| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
/*
** lineFrame: 虛線的 frame
** length: 虛線中短線的寬度
** spacing: 虛線中短線之間的間距
** color: 虛線中短線的顏色
*/
+ (UIView *)createDashedLineWithFrame:(CGRect)lineFrame
lineLength:(int)length
lineSpacing:(int)spacing
lineColor:(UIColor *)color{
UIView *dashedLine = [[UIView alloc] initWithFrame:lineFrame];
dashedLine.backgroundColor = [UIColor clearColor];
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
[shapeLayer setBounds:dashedLine.bounds];
[shapeLayer setPosition:CGPointMake(CGRectGetWidth(dashedLine.frame) / 2, CGRectGetHeight(dashedLine.frame))];
[shapeLayer setFillColor:[UIColor clearColor].CGColor];
[shapeLayer setStrokeColor:color.CGColor];
[shapeLayer setLineWidth:CGRectGetHeight(dashedLine.frame)];
[shapeLayer setLineJoin:kCALineJoinRound];
[shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:length], [NSNumber numberWithInt:spacing], nil]];
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, 0, 0);
CGPathAddLineToPoint(path, NULL, CGRectGetWidth(dashedLine.frame), 0);
[shapeLayer setPath:path];
CGPathRelease(path);
[dashedLine.layer addSublayer:shapeLayer];
return dashedLine;
}
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 |
//磁盤總空間
+ (CGFloat)diskOfAllSizeMBytes{
CGFloat size = 0.0;
NSError *error;
NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
if (error) {
#ifdef DEBUG
NSLog(@"error: %@", error.localizedDescription);
#endif
}else{
NSNumber *number = [dic objectForKey:NSFileSystemSize];
size = [number floatValue]/1024/1024;
}
return size;
}
|
2. 獲取磁盤可用空間大小 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 |
//磁盤可用空間
+ (CGFloat)diskOfFreeSizeMBytes{
CGFloat size = 0.0;
NSError *error;
NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
if (error) {
#ifdef DEBUG
NSLog(@"error: %@", error.localizedDescription);
#endif
}else{
NSNumber *number = [dic objectForKey:NSFileSystemFreeSize];
size = [number floatValue]/1024/1024;
}
return size;
}
|
3. 獲取指定路徑下某個文件的大小 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 |
//獲取文件大小
+ (long long)fileSizeAtPath:(NSString *)filePath{
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:filePath]) return 0;
return [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize];
}
|
4. 獲取文件夾下全部文件的大小 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 |
//獲取文件夾下全部文件的大小
+ (long long)folderSizeAtPath:(NSString *)folderPath{
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:folderPath]) return 0;
NSEnumerator *filesEnumerator = [[fileManager subpathsAtPath:folderPath] objectEnumerator];
NSString *fileName;
long long folerSize = 0;
while ((fileName = [filesEnumerator nextObject]) != nil) {
NSString *filePath = [folderPath stringByAppendingPathComponent:fileName];
folerSize += [self fileSizeAtPath:filePath];
}
return folerSize;
}
|
5. 獲取字符串(或漢字)首字母 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
//獲取字符串(或漢字)首字母
+ (NSString *)firstCharacterWithString:(NSString *)string{
NSMutableString *str = [NSMutableString stringWithString:string];
CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformMandarinLatin, NO);
CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformStripDiacritics, NO);
NSString *pingyin = [str capitalizedString];
return [pingyin substringToIndex:1];
}
|
6. 將字符串數組按照元素首字母順序進行排序分組 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 |
//將字符串數組按照元素首字母順序進行排序分組
+ (NSDictionary *)dictionaryOrderByCharacterWithOriginalArray:(NSArray *)array{
if (array.count == 0) {
return nil;
}
for (id obj in array) {
if (![obj isKindOfClass:[NSString class]]) {
return nil;
}
}
UILocalizedIndexedCollation *indexedCollation = [UILocalizedIndexedCollation currentCollation];
NSMutableArray *objects = [NSMutableArray arrayWithCapacity:indexedCollation.sectionTitles.count];
//建立27個分組數組
for (int i = 0; i < indexedCollation.sectionTitles.count; i++) {
NSMutableArray *obj = [NSMutableArray array];
[objects addObject:obj];
}
NSMutableArray *keys = [NSMutableArray arrayWithCapacity:objects.count];
//按字母順序進行分組
NSInteger lastIndex = -1;
for (int i = 0; i < array.count; i++) {
NSInteger index = [indexedCollation sectionForObject:array[i] collationStringSelector:@selector(uppercaseString)];
[[objects objectAtIndex:index] addObject:array[i]];
lastIndex = index;
}
//去掉空數組
for (int i = 0; i < objects.count; i++) {
NSMutableArray *obj = objects[i];
if (obj.count == 0) {
[objects removeObject:obj];
}
}
//獲取索引字母
for (NSMutableArray *obj in objects) {
NSString *str = obj[0];
NSString *key = [self firstCharacterWithString:str];
[keys addObject:key];
}
NSMutableDictionary *dic = [NSMutableDictionary dictionary];
[dic setObject:objects forKey:keys];
return dic;
}
//獲取字符串(或漢字)首字母
+ (NSString *)firstCharacterWithString:(NSString *)string{
NSMutableString *str = [NSMutableString stringWithString:string];
CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformMandarinLatin, NO);
CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformStripDiacritics, NO);
NSString *pingyin = [str capitalizedString];
return [pingyin substringToIndex:1];
}
|
使用以下: [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 |
NSArray *arr = @[@"guangzhou", @"shanghai", @"北京", @"henan", @"hainan"];
NSDictionary *dic = [Utilities dictionaryOrderByCharacterWithOriginalArray:arr];
NSLog(@"\n\ndic: %@", dic);
|
輸出結果以下: 
輸出結果
7. 獲取當前時間 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 |
//獲取當前時間
//format: @"yyyy-MM-dd HH:mm:ss"、@"yyyy年MM月dd日 HH時mm分ss秒"
+ (NSString *)currentDateWithFormat:(NSString *)format{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:format];
return [dateFormatter stringFromDate:[NSDate date]];
}
|
8. 計算上第二天期距離如今多久, 如 xx 小時前、xx 分鐘前等 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 |
/**
* 計算上第二天期距離如今多久
*
* @param lastTime 上第二天期(須要和格式對應)
* @param format1 上第二天期格式
* @param currentTime 最近日期(須要和格式對應)
* @param format2 最近日期格式
*
* @return xx分鐘前、xx小時前、xx天前
*/
+ (NSString *)timeIntervalFromLastTime:(NSString *)lastTime
lastTimeFormat:(NSString *)format1
ToCurrentTime:(NSString *)currentTime
currentTimeFormat:(NSString *)format2{
//上次時間
NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc]init];
dateFormatter1.dateFormat = format1;
NSDate *lastDate = [dateFormatter1 dateFromString:lastTime];
//當前時間
NSDateFormatter *dateFormatter2 = [[NSDateFormatter alloc]init];
dateFormatter2.dateFormat = format2;
NSDate *currentDate = [dateFormatter2 dateFromString:currentTime];
return [Utilities timeIntervalFromLastTime:lastDate ToCurrentTime:currentDate];
}
+ (NSString *)timeIntervalFromLastTime:(NSDate *)lastTime ToCurrentTime:(NSDate *)currentTime{
NSTimeZone *timeZone = [NSTimeZone systemTimeZone];
//上次時間
NSDate *lastDate = [lastTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:lastTime]];
//當前時間
NSDate *currentDate = [currentTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:currentTime]];
//時間間隔
NSInteger intevalTime = [currentDate timeIntervalSinceReferenceDate] - [lastDate timeIntervalSinceReferenceDate];
//秒、分、小時、天、月、年
NSInteger minutes = intevalTime / 60;
NSInteger hours = intevalTime / 60 / 60;
NSInteger day = intevalTime / 60 / 60 / 24;
NSInteger month = intevalTime / 60 / 60 / 24 / 30;
NSInteger yers = intevalTime / 60 / 60 / 24 / 365;
if (minutes <= 10) {
return @"剛剛";
}else if (minutes < 60){
return [NSString stringWithFormat: @"%ld分鐘前",(long)minutes];
}else if (hours < 24){
return [NSString stringWithFormat: @"%ld小時前",(long)hours];
}else if (day < 30){
return [NSString stringWithFormat: @"%ld天前",(long)day];
}else if (month < 12){
NSDateFormatter * df =[[NSDateFormatter alloc]init];
df.dateFormat = @"M月d日";
NSString * time = [df stringFromDate:lastDate];
return time;
}else if (yers >= 1){
NSDateFormatter * df =[[NSDateFormatter alloc]init];
df.dateFormat = @"yyyy年M月d日";
NSString * time = [df stringFromDate:lastDate];
return time;
}
return @"";
}
|
使用以下: [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 |
NSLog(@"\n\nresult: %@", [Utilities timeIntervalFromLastTime:@"2015年12月8日 15:50"
lastTimeFormat:@"yyyy年MM月dd日 HH:mm"
ToCurrentTime:@"2015/12/08 16:12"
currentTimeFormat:@"yyyy/MM/dd HH:mm"]);
|
輸出結果以下:
輸出結果
9. 判斷手機號碼格式是否正確 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 |
//判斷手機號碼格式是否正確
+ (BOOL)valiMobile:(NSString *)mobile{
mobile = [mobile stringByReplacingOccurrencesOfString:@" " withString:@""];
if (mobile.length != 11)
{
return NO;
}else{
/**
* 移動號段正則表達式
*/
NSString *CM_NUM = @"^((13[4-9])|(147)|(15[0-2,7-9])|(178)|(18[2-4,7-8]))\\d{8}|(1705)\\d{7}$";
/**
* 聯通號段正則表達式
*/
NSString *CU_NUM = @"^((13[0-2])|(145)|(15[5-6])|(176)|(18[5,6]))\\d{8}|(1709)\\d{7}$";
/**
* 電信號段正則表達式
*/
NSString *CT_NUM = @"^((133)|(153)|(177)|(18[0,1,9]))\\d{8}$";
NSPredicate *pred1 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM_NUM];
BOOL isMatch1 = [pred1 evaluateWithObject:mobile];
NSPredicate *pred2 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU_NUM];
BOOL isMatch2 = [pred2 evaluateWithObject:mobile];
NSPredicate *pred3 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT_NUM];
BOOL isMatch3 = [pred3 evaluateWithObject:mobile];
if (isMatch1 || isMatch2 || isMatch3) {
return YES;
}else{
return NO;
}
}
}
|
10. 判斷郵箱格式是否正確 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 |
//利用正則表達式驗證
+ (BOOL)isAvailableEmail:(NSString *)email {
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
return [emailTest evaluateWithObject:email];
}
|
11. 將十六進制顏色轉換爲 UIColor 對象 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 |
//將十六進制顏色轉換爲 UIColor 對象
+ (UIColor *)colorWithHexString:(NSString *)color{
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// String should be 6 or 8 characters
if ([cString length] < 6) {
return [UIColor clearColor];
}
// strip "0X" or "#" if it appears
if ([cString hasPrefix:@"0X"])
cString = [cString substringFromIndex:2];
if ([cString hasPrefix:@"#"])
cString = [cString substringFromIndex:1];
if ([cString length] != 6)
return [UIColor clearColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
//r
NSString *rString = [cString substringWithRange:range];
//g
range.location = 2;
NSString *gString = [cString substringWithRange:range];
//b
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
unsigned int r, g, b;
[[NSScanner scannerWithString:rString] scanHexInt:&r];
[[NSScanner scannerWithString:gString] scanHexInt:&g];
[[NSScanner scannerWithString:bString] scanHexInt:&b];
return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
}
|
12. 對圖片進行濾鏡處理 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 |
#pragma mark - 對圖片進行濾鏡處理
// 懷舊 --> CIPhotoEffectInstant 單色 --> CIPhotoEffectMono
// 黑白 --> CIPhotoEffectNoir 褪色 --> CIPhotoEffectFade
// 色調 --> CIPhotoEffectTonal 沖印 --> CIPhotoEffectProcess
// 歲月 --> CIPhotoEffectTransfer 鉻黃 --> CIPhotoEffectChrome
// CILinearToSRGBToneCurve, CISRGBToneCurveToLinear, CIGaussianBlur, CIBoxBlur, CIDiscBlur, CISepiaTone, CIDepthOfField
+ (UIImage *)filterWithOriginalImage:(UIImage *)image filterName:(NSString *)name{
CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc] initWithImage:image];
CIFilter *filter = [CIFilter filterWithName:name];
[filter setValue:inputImage forKey:kCIInputImageKey];
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
return resultImage;
}
|
13. 對圖片進行模糊處理 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 |
#pragma mark - 對圖片進行模糊處理
// CIGaussianBlur ---> 高斯模糊
// CIBoxBlur ---> 均值模糊(Available in iOS 9.0 and later)
// CIDiscBlur ---> 環形卷積模糊(Available in iOS 9.0 and later)
// CIMedianFilter ---> 中值模糊, 用於消除圖像噪點, 無需設置radius(Available in iOS 9.0 and later)
// CIMotionBlur ---> 運動模糊, 用於模擬相機移動拍攝時的掃尾效果(Available in iOS 9.0 and later)
+ (UIImage *)blurWithOriginalImage:(UIImage *)image blurName:(NSString *)name radius:(NSInteger)radius{
CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc] initWithImage:image];
CIFilter *filter;
if (name.length != 0) {
filter = [CIFilter filterWithName:name];
[filter setValue:inputImage forKey:kCIInputImageKey];
if (![name isEqualToString:@"CIMedianFilter"]) {
[filter setValue:@(radius) forKey:@"inputRadius"];
}
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
return resultImage;
}else{
return nil;
}
}
|
14. 調整圖片飽和度、亮度、對比度 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
/**
* 調整圖片飽和度, 亮度, 對比度
*
* @param image 目標圖片
* @param saturation 飽和度
* @param brightness 亮度: -1.0 ~ 1.0
* @param contrast 對比度
*
*/
+ (UIImage *)colorControlsWithOriginalImage:(UIImage *)image
saturation:(CGFloat)saturation
brightness:(CGFloat)brightness
contrast:(CGFloat)contrast{
CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc] initWithImage:image];
CIFilter *filter = [CIFilter filterWithName:@"CIColorControls"];
[filter setValue:inputImage forKey:kCIInputImageKey];
[filter setValue:@(saturation) forKey:@"inputSaturation"];
[filter setValue:@(brightness) forKey:@"inputBrightness"];// 0.0 ~ 1.0
[filter setValue:@(contrast) forKey:@"inputContrast"];
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
return resultImage;
}
|
15. 建立一張實時模糊效果 View (毛玻璃效果) [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 |
//Avilable in iOS 8.0 and later
+ (UIVisualEffectView *)effectViewWithFrame:(CGRect)frame{
UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect];
effectView.frame = frame;
return effectView;
}
|
16. 全屏截圖 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 9 |
//全屏截圖
+ (UIImage *)shotScreen{
UIWindow *window = [UIApplication sharedApplication].keyWindow;
UIGraphicsBeginImageContext(window.bounds.size);
[window.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
|
17. 截取一張 view 生成圖片 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
//截取view生成一張圖片
+ (UIImage *)shotWithView:(UIView *)view{
UIGraphicsBeginImageContext(view.bounds.size);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
|
18. 截取view中某個區域生成一張圖片 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 |
//截取view中某個區域生成一張圖片
+ (UIImage *)shotWithView:(UIView *)view scope:(CGRect)scope{
CGImageRef imageRef = CGImageCreateWithImageInRect([self shotWithView:view].CGImage, scope);
UIGraphicsBeginImageContext(scope.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGRect rect = CGRectMake(0, 0, scope.size.width, scope.size.height);
CGContextTranslateCTM(context, 0, rect.size.height);//下移
CGContextScaleCTM(context, 1.0f, -1.0f);//上翻
CGContextDrawImage(context, rect, imageRef);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRelease(imageRef);
CGContextRelease(context);
return image;
}
|
19. 壓縮圖片到指定尺寸大小 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
//壓縮圖片到指定尺寸大小
+ (UIImage *)compressOriginalImage:(UIImage *)image toSize:(CGSize)size{
UIImage *resultImage = image;
UIGraphicsBeginImageContext(size);
[resultImage drawInRect:CGRectMake(0, 0, size.width, size.height)];
UIGraphicsEndImageContext();
return resultImage;
}
|
20. 壓縮圖片到指定文件大小 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 |
//壓縮圖片到指定文件大小
+ (NSData *)compressOriginalImage:(UIImage *)image toMaxDataSizeKBytes:(CGFloat)size{
NSData *data = UIImageJPEGRepresentation(image, 1.0);
CGFloat dataKBytes = data.length/1000.0;
CGFloat maxQuality = 0.9f;
CGFloat lastData = dataKBytes;
while (dataKBytes > size && maxQuality > 0.01f) {
maxQuality = maxQuality - 0.01f;
data = UIImageJPEGRepresentation(image, maxQuality);
dataKBytes = data.length/1000.0;
if (lastData == dataKBytes) {
break;
}else{
lastData = dataKBytes;
}
}
return data;
}
|
21. 獲取設備 IP 地址 須要先引入下頭文件: [Objective-C] 查看源文件 複製代碼 ?
| 1 2 |
#import <ifaddrs.h>
#import <arpa/inet.h>
|
代碼: [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 |
//獲取設備 IP 地址
+ (NSString *)getIPAddress {
NSString *address = @"error";
struct ifaddrs *interfaces = NULL;
struct ifaddrs *temp_addr = NULL;
int success = 0;
success = getifaddrs(&interfaces);
if (success == 0) {
temp_addr = interfaces;
while(temp_addr != NULL) {
if(temp_addr->ifa_addr->sa_family == AF_INET) {
if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
}
}
temp_addr = temp_addr->ifa_next;
}
}
freeifaddrs(interfaces);
return address;
}
|
22. 判斷字符串中是否含有空格 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
+ (BOOL)isHaveSpaceInString:(NSString *)string{
NSRange _range = [string rangeOfString:@" "];
if (_range.location != NSNotFound) {
return YES;
}else {
return NO;
}
}
|
23. 判斷字符串中是否含有某個字符串 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
+ (BOOL)isHaveString:(NSString *)string1 InString:(NSString *)string2{
NSRange _range = [string2 rangeOfString:string1];
if (_range.location != NSNotFound) {
return YES;
}else {
return NO;
}
}
|
24. 判斷字符串中是否含有中文 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 9 |
+ (BOOL)isHaveChineseInString:(NSString *)string{
for(NSInteger i = 0; i < [string length]; i++){
int a = [string characterAtIndex:i];
if (a > 0x4e00 && a < 0x9fff) {
return YES;
}
}
return NO;
}
|
25. 判斷字符串是否所有爲數字 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 |
+ (BOOL)isAllNum:(NSString *)string{
unichar c;
for (int i=0; i<string.length; i++) {
c=[string characterAtIndex:i];
if (!isdigit(c)) {
return NO;
}
}
return YES;
}
|
26. 繪製虛線 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
/*
** lineFrame: 虛線的 frame
** length: 虛線中短線的寬度
** spacing: 虛線中短線之間的間距
** color: 虛線中短線的顏色
*/
+ (UIView *)createDashedLineWithFrame:(CGRect)lineFrame
lineLength:(int)length
lineSpacing:(int)spacing
lineColor:(UIColor *)color{
UIView *dashedLine = [[UIView alloc] initWithFrame:lineFrame];
dashedLine.backgroundColor = [UIColor clearColor];
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
[shapeLayer setBounds:dashedLine.bounds];
[shapeLayer setPosition:CGPointMake(CGRectGetWidth(dashedLine.frame) / 2, CGRectGetHeight(dashedLine.frame))];
[shapeLayer setFillColor:[UIColor clearColor].CGColor];
[shapeLayer setStrokeColor:color.CGColor];
[shapeLayer setLineWidth:CGRectGetHeight(dashedLine.frame)];
[shapeLayer setLineJoin:kCALineJoinRound];
[shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:length], [NSNumber numberWithInt:spacing], nil]];
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, 0, 0);
CGPathAddLineToPoint(path, NULL, CGRectGetWidth(dashedLine.frame), 0);
[shapeLayer setPath:path];
CGPathRelease(path);
[dashedLine.layer addSublayer:shapeLayer];
return dashedLine;
}
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 |
//磁盤總空間
+ (CGFloat)diskOfAllSizeMBytes{
CGFloat size = 0.0;
NSError *error;
NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
if (error) {
#ifdef DEBUG
NSLog(@"error: %@", error.localizedDescription);
#endif
}else{
NSNumber *number = [dic objectForKey:NSFileSystemSize];
size = [number floatValue]/1024/1024;
}
return size;
}
|
2. 獲取磁盤可用空間大小 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 |
//磁盤可用空間
+ (CGFloat)diskOfFreeSizeMBytes{
CGFloat size = 0.0;
NSError *error;
NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
if (error) {
#ifdef DEBUG
NSLog(@"error: %@", error.localizedDescription);
#endif
}else{
NSNumber *number = [dic objectForKey:NSFileSystemFreeSize];
size = [number floatValue]/1024/1024;
}
return size;
}
|
3. 獲取指定路徑下某個文件的大小 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 |
//獲取文件大小
+ (long long)fileSizeAtPath:(NSString *)filePath{
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:filePath]) return 0;
return [[fileManager attributesOfItemAtPath:filePath error:nil] fileSize];
}
|
4. 獲取文件夾下全部文件的大小 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 |
//獲取文件夾下全部文件的大小
+ (long long)folderSizeAtPath:(NSString *)folderPath{
NSFileManager *fileManager = [NSFileManager defaultManager];
if (![fileManager fileExistsAtPath:folderPath]) return 0;
NSEnumerator *filesEnumerator = [[fileManager subpathsAtPath:folderPath] objectEnumerator];
NSString *fileName;
long long folerSize = 0;
while ((fileName = [filesEnumerator nextObject]) != nil) {
NSString *filePath = [folderPath stringByAppendingPathComponent:fileName];
folerSize += [self fileSizeAtPath:filePath];
}
return folerSize;
}
|
5. 獲取字符串(或漢字)首字母 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
//獲取字符串(或漢字)首字母
+ (NSString *)firstCharacterWithString:(NSString *)string{
NSMutableString *str = [NSMutableString stringWithString:string];
CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformMandarinLatin, NO);
CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformStripDiacritics, NO);
NSString *pingyin = [str capitalizedString];
return [pingyin substringToIndex:1];
}
|
6. 將字符串數組按照元素首字母順序進行排序分組 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 |
//將字符串數組按照元素首字母順序進行排序分組
+ (NSDictionary *)dictionaryOrderByCharacterWithOriginalArray:(NSArray *)array{
if (array.count == 0) {
return nil;
}
for (id obj in array) {
if (![obj isKindOfClass:[NSString class]]) {
return nil;
}
}
UILocalizedIndexedCollation *indexedCollation = [UILocalizedIndexedCollation currentCollation];
NSMutableArray *objects = [NSMutableArray arrayWithCapacity:indexedCollation.sectionTitles.count];
//建立27個分組數組
for (int i = 0; i < indexedCollation.sectionTitles.count; i++) {
NSMutableArray *obj = [NSMutableArray array];
[objects addObject:obj];
}
NSMutableArray *keys = [NSMutableArray arrayWithCapacity:objects.count];
//按字母順序進行分組
NSInteger lastIndex = -1;
for (int i = 0; i < array.count; i++) {
NSInteger index = [indexedCollation sectionForObject:array[i] collationStringSelector:@selector(uppercaseString)];
[[objects objectAtIndex:index] addObject:array[i]];
lastIndex = index;
}
//去掉空數組
for (int i = 0; i < objects.count; i++) {
NSMutableArray *obj = objects[i];
if (obj.count == 0) {
[objects removeObject:obj];
}
}
//獲取索引字母
for (NSMutableArray *obj in objects) {
NSString *str = obj[0];
NSString *key = [self firstCharacterWithString:str];
[keys addObject:key];
}
NSMutableDictionary *dic = [NSMutableDictionary dictionary];
[dic setObject:objects forKey:keys];
return dic;
}
//獲取字符串(或漢字)首字母
+ (NSString *)firstCharacterWithString:(NSString *)string{
NSMutableString *str = [NSMutableString stringWithString:string];
CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformMandarinLatin, NO);
CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformStripDiacritics, NO);
NSString *pingyin = [str capitalizedString];
return [pingyin substringToIndex:1];
}
|
使用以下: [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 |
NSArray *arr = @[@"guangzhou", @"shanghai", @"北京", @"henan", @"hainan"];
NSDictionary *dic = [Utilities dictionaryOrderByCharacterWithOriginalArray:arr];
NSLog(@"\n\ndic: %@", dic);
|
輸出結果以下:
輸出結果
7. 獲取當前時間 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 |
//獲取當前時間
//format: @"yyyy-MM-dd HH:mm:ss"、@"yyyy年MM月dd日 HH時mm分ss秒"
+ (NSString *)currentDateWithFormat:(NSString *)format{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:format];
return [dateFormatter stringFromDate:[NSDate date]];
}
|
8. 計算上第二天期距離如今多久, 如 xx 小時前、xx 分鐘前等 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 |
/**
* 計算上第二天期距離如今多久
*
* @param lastTime 上第二天期(須要和格式對應)
* @param format1 上第二天期格式
* @param currentTime 最近日期(須要和格式對應)
* @param format2 最近日期格式
*
* @return xx分鐘前、xx小時前、xx天前
*/
+ (NSString *)timeIntervalFromLastTime:(NSString *)lastTime
lastTimeFormat:(NSString *)format1
ToCurrentTime:(NSString *)currentTime
currentTimeFormat:(NSString *)format2{
//上次時間
NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc]init];
dateFormatter1.dateFormat = format1;
NSDate *lastDate = [dateFormatter1 dateFromString:lastTime];
//當前時間
NSDateFormatter *dateFormatter2 = [[NSDateFormatter alloc]init];
dateFormatter2.dateFormat = format2;
NSDate *currentDate = [dateFormatter2 dateFromString:currentTime];
return [Utilities timeIntervalFromLastTime:lastDate ToCurrentTime:currentDate];
}
+ (NSString *)timeIntervalFromLastTime:(NSDate *)lastTime ToCurrentTime:(NSDate *)currentTime{
NSTimeZone *timeZone = [NSTimeZone systemTimeZone];
//上次時間
NSDate *lastDate = [lastTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:lastTime]];
//當前時間
NSDate *currentDate = [currentTime dateByAddingTimeInterval:[timeZone secondsFromGMTForDate:currentTime]];
//時間間隔
NSInteger intevalTime = [currentDate timeIntervalSinceReferenceDate] - [lastDate timeIntervalSinceReferenceDate];
//秒、分、小時、天、月、年
NSInteger minutes = intevalTime / 60;
NSInteger hours = intevalTime / 60 / 60;
NSInteger day = intevalTime / 60 / 60 / 24;
NSInteger month = intevalTime / 60 / 60 / 24 / 30;
NSInteger yers = intevalTime / 60 / 60 / 24 / 365;
if (minutes <= 10) {
return @"剛剛";
}else if (minutes < 60){
return [NSString stringWithFormat: @"%ld分鐘前",(long)minutes];
}else if (hours < 24){
return [NSString stringWithFormat: @"%ld小時前",(long)hours];
}else if (day < 30){
return [NSString stringWithFormat: @"%ld天前",(long)day];
}else if (month < 12){
NSDateFormatter * df =[[NSDateFormatter alloc]init];
df.dateFormat = @"M月d日";
NSString * time = [df stringFromDate:lastDate];
return time;
}else if (yers >= 1){
NSDateFormatter * df =[[NSDateFormatter alloc]init];
df.dateFormat = @"yyyy年M月d日";
NSString * time = [df stringFromDate:lastDate];
return time;
}
return @"";
}
|
使用以下: [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 |
NSLog(@"\n\nresult: %@", [Utilities timeIntervalFromLastTime:@"2015年12月8日 15:50"
lastTimeFormat:@"yyyy年MM月dd日 HH:mm"
ToCurrentTime:@"2015/12/08 16:12"
currentTimeFormat:@"yyyy/MM/dd HH:mm"]);
|
輸出結果以下:
輸出結果
9. 判斷手機號碼格式是否正確 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 |
//判斷手機號碼格式是否正確
+ (BOOL)valiMobile:(NSString *)mobile{
mobile = [mobile stringByReplacingOccurrencesOfString:@" " withString:@""];
if (mobile.length != 11)
{
return NO;
}else{
/**
* 移動號段正則表達式
*/
NSString *CM_NUM = @"^((13[4-9])|(147)|(15[0-2,7-9])|(178)|(18[2-4,7-8]))\\d{8}|(1705)\\d{7}$";
/**
* 聯通號段正則表達式
*/
NSString *CU_NUM = @"^((13[0-2])|(145)|(15[5-6])|(176)|(18[5,6]))\\d{8}|(1709)\\d{7}$";
/**
* 電信號段正則表達式
*/
NSString *CT_NUM = @"^((133)|(153)|(177)|(18[0,1,9]))\\d{8}$";
NSPredicate *pred1 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM_NUM];
BOOL isMatch1 = [pred1 evaluateWithObject:mobile];
NSPredicate *pred2 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU_NUM];
BOOL isMatch2 = [pred2 evaluateWithObject:mobile];
NSPredicate *pred3 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT_NUM];
BOOL isMatch3 = [pred3 evaluateWithObject:mobile];
if (isMatch1 || isMatch2 || isMatch3) {
return YES;
}else{
return NO;
}
}
}
|
10. 判斷郵箱格式是否正確 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 |
//利用正則表達式驗證
+ (BOOL)isAvailableEmail:(NSString *)email {
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
return [emailTest evaluateWithObject:email];
}
|
11. 將十六進制顏色轉換爲 UIColor 對象 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 |
//將十六進制顏色轉換爲 UIColor 對象
+ (UIColor *)colorWithHexString:(NSString *)color{
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// String should be 6 or 8 characters
if ([cString length] < 6) {
return [UIColor clearColor];
}
// strip "0X" or "#" if it appears
if ([cString hasPrefix:@"0X"])
cString = [cString substringFromIndex:2];
if ([cString hasPrefix:@"#"])
cString = [cString substringFromIndex:1];
if ([cString length] != 6)
return [UIColor clearColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
//r
NSString *rString = [cString substringWithRange:range];
//g
range.location = 2;
NSString *gString = [cString substringWithRange:range];
//b
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
unsigned int r, g, b;
[[NSScanner scannerWithString:rString] scanHexInt:&r];
[[NSScanner scannerWithString:gString] scanHexInt:&g];
[[NSScanner scannerWithString:bString] scanHexInt:&b];
return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
}
|
12. 對圖片進行濾鏡處理 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 |
#pragma mark - 對圖片進行濾鏡處理
// 懷舊 --> CIPhotoEffectInstant 單色 --> CIPhotoEffectMono
// 黑白 --> CIPhotoEffectNoir 褪色 --> CIPhotoEffectFade
// 色調 --> CIPhotoEffectTonal 沖印 --> CIPhotoEffectProcess
// 歲月 --> CIPhotoEffectTransfer 鉻黃 --> CIPhotoEffectChrome
// CILinearToSRGBToneCurve, CISRGBToneCurveToLinear, CIGaussianBlur, CIBoxBlur, CIDiscBlur, CISepiaTone, CIDepthOfField
+ (UIImage *)filterWithOriginalImage:(UIImage *)image filterName:(NSString *)name{
CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc] initWithImage:image];
CIFilter *filter = [CIFilter filterWithName:name];
[filter setValue:inputImage forKey:kCIInputImageKey];
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
return resultImage;
}
|
13. 對圖片進行模糊處理 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 |
#pragma mark - 對圖片進行模糊處理
// CIGaussianBlur ---> 高斯模糊
// CIBoxBlur ---> 均值模糊(Available in iOS 9.0 and later)
// CIDiscBlur ---> 環形卷積模糊(Available in iOS 9.0 and later)
// CIMedianFilter ---> 中值模糊, 用於消除圖像噪點, 無需設置radius(Available in iOS 9.0 and later)
// CIMotionBlur ---> 運動模糊, 用於模擬相機移動拍攝時的掃尾效果(Available in iOS 9.0 and later)
+ (UIImage *)blurWithOriginalImage:(UIImage *)image blurName:(NSString *)name radius:(NSInteger)radius{
CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc] initWithImage:image];
CIFilter *filter;
if (name.length != 0) {
filter = [CIFilter filterWithName:name];
[filter setValue:inputImage forKey:kCIInputImageKey];
if (![name isEqualToString:@"CIMedianFilter"]) {
[filter setValue:@(radius) forKey:@"inputRadius"];
}
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
return resultImage;
}else{
return nil;
}
}
|
14. 調整圖片飽和度、亮度、對比度 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
/**
* 調整圖片飽和度, 亮度, 對比度
*
* @param image 目標圖片
* @param saturation 飽和度
* @param brightness 亮度: -1.0 ~ 1.0
* @param contrast 對比度
*
*/
+ (UIImage *)colorControlsWithOriginalImage:(UIImage *)image
saturation:(CGFloat)saturation
brightness:(CGFloat)brightness
contrast:(CGFloat)contrast{
CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc] initWithImage:image];
CIFilter *filter = [CIFilter filterWithName:@"CIColorControls"];
[filter setValue:inputImage forKey:kCIInputImageKey];
[filter setValue:@(saturation) forKey:@"inputSaturation"];
[filter setValue:@(brightness) forKey:@"inputBrightness"];// 0.0 ~ 1.0
[filter setValue:@(contrast) forKey:@"inputContrast"];
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
return resultImage;
}
|
15. 建立一張實時模糊效果 View (毛玻璃效果) [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 |
//Avilable in iOS 8.0 and later
+ (UIVisualEffectView *)effectViewWithFrame:(CGRect)frame{
UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect];
effectView.frame = frame;
return effectView;
}
|
16. 全屏截圖 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 9 |
//全屏截圖
+ (UIImage *)shotScreen{
UIWindow *window = [UIApplication sharedApplication].keyWindow;
UIGraphicsBeginImageContext(window.bounds.size);
[window.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
|
17. 截取一張 view 生成圖片 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
//截取view生成一張圖片
+ (UIImage *)shotWithView:(UIView *)view{
UIGraphicsBeginImageContext(view.bounds.size);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
|
18. 截取view中某個區域生成一張圖片 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 |
//截取view中某個區域生成一張圖片
+ (UIImage *)shotWithView:(UIView *)view scope:(CGRect)scope{
CGImageRef imageRef = CGImageCreateWithImageInRect([self shotWithView:view].CGImage, scope);
UIGraphicsBeginImageContext(scope.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGRect rect = CGRectMake(0, 0, scope.size.width, scope.size.height);
CGContextTranslateCTM(context, 0, rect.size.height);//下移
CGContextScaleCTM(context, 1.0f, -1.0f);//上翻
CGContextDrawImage(context, rect, imageRef);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRelease(imageRef);
CGContextRelease(context);
return image;
}
|
19. 壓縮圖片到指定尺寸大小 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
//壓縮圖片到指定尺寸大小
+ (UIImage *)compressOriginalImage:(UIImage *)image toSize:(CGSize)size{
UIImage *resultImage = image;
UIGraphicsBeginImageContext(size);
[resultImage drawInRect:CGRectMake(0, 0, size.width, size.height)];
UIGraphicsEndImageContext();
return resultImage;
}
|
20. 壓縮圖片到指定文件大小 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 |
//壓縮圖片到指定文件大小
+ (NSData *)compressOriginalImage:(UIImage *)image toMaxDataSizeKBytes:(CGFloat)size{
NSData *data = UIImageJPEGRepresentation(image, 1.0);
CGFloat dataKBytes = data.length/1000.0;
CGFloat maxQuality = 0.9f;
CGFloat lastData = dataKBytes;
while (dataKBytes > size && maxQuality > 0.01f) {
maxQuality = maxQuality - 0.01f;
data = UIImageJPEGRepresentation(image, maxQuality);
dataKBytes = data.length/1000.0;
if (lastData == dataKBytes) {
break;
}else{
lastData = dataKBytes;
}
}
return data;
}
|
21. 獲取設備 IP 地址 須要先引入下頭文件: [Objective-C] 查看源文件 複製代碼 ?
| 1 2 |
#import <ifaddrs.h>
#import <arpa/inet.h>
|
代碼: [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 |
//獲取設備 IP 地址
+ (NSString *)getIPAddress {
NSString *address = @"error";
struct ifaddrs *interfaces = NULL;
struct ifaddrs *temp_addr = NULL;
int success = 0;
success = getifaddrs(&interfaces);
if (success == 0) {
temp_addr = interfaces;
while(temp_addr != NULL) {
if(temp_addr->ifa_addr->sa_family == AF_INET) {
if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
}
}
temp_addr = temp_addr->ifa_next;
}
}
freeifaddrs(interfaces);
return address;
}
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22. 判斷字符串中是否含有空格 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
+ (BOOL)isHaveSpaceInString:(NSString *)string{
NSRange _range = [string rangeOfString:@" "];
if (_range.location != NSNotFound) {
return YES;
}else {
return NO;
}
}
|
23. 判斷字符串中是否含有某個字符串 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 |
+ (BOOL)isHaveString:(NSString *)string1 InString:(NSString *)string2{
NSRange _range = [string2 rangeOfString:string1];
if (_range.location != NSNotFound) {
return YES;
}else {
return NO;
}
}
|
24. 判斷字符串中是否含有中文 [Objective-C] 查看源文件 複製代碼 ?
| 1 2 3 4 5 6 7 8 9 |
+ (BOOL)isHaveChineseInString:(NSString *)string{
for(NSInteger i = 0; i < [string length]; i++){
int a = [string characterAtIndex:i];
if (a > 0x4e00 && a < 0x9fff) {
return YES;
}
}
return NO;
}
|
25. 判斷字符串是否所有爲數字 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 |
+ (BOOL)isAllNum:(NSString *)string{
unichar c;
for (int i=0; i<string.length; i++) {
c=[string characterAtIndex:i];
if (!isdigit(c)) {
return NO;
}
}
return YES;
}
|
26. 繪製虛線 [Objective-C] 查看源文件 複製代碼 ?
| 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
/*
** lineFrame: 虛線的 frame
** length: 虛線中短線的寬度
** spacing: 虛線中短線之間的間距
** color: 虛線中短線的顏色
*/
+ (UIView *)createDashedLineWithFrame:(CGRect)lineFrame
lineLength:(int)length
lineSpacing:(int)spacing
lineColor:(UIColor *)color{
UIView *dashedLine = [[UIView alloc] initWithFrame:lineFrame];
dashedLine.backgroundColor = [UIColor clearColor];
CAShapeLayer *shapeLayer = [CAShapeLayer layer];
[shapeLayer setBounds:dashedLine.bounds];
[shapeLayer setPosition:CGPointMake(CGRectGetWidth(dashedLine.frame) / 2, CGRectGetHeight(dashedLine.frame))];
[shapeLayer setFillColor:[UIColor clearColor].CGColor];
[shapeLayer setStrokeColor:color.CGColor];
[shapeLayer setLineWidth:CGRectGetHeight(dashedLine.frame)];
[shapeLayer setLineJoin:kCALineJoinRound];
[shapeLayer setLineDashPattern:[NSArray arrayWithObjects:[NSNumber numberWithInt:length], [NSNumber numberWithInt:spacing], nil]];
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, 0, 0);
CGPathAddLineToPoint(path, NULL, CGRectGetWidth(dashedLine.frame), 0);
[shapeLayer setPath:path];
CGPathRelease(path);
[dashedLine.layer addSublayer:shapeLayer];
return dashedLine;
}
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