50、cocoapods升級
在終端執行 sudo gem install -n / usr / local / bin cocoapods --pre
51、設置啓動頁後，依然顯示之前的
刪除app，手機重啓，重新安裝
52、判斷圖片類型
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//通過圖片Data數據第一個字節 來獲取圖片擴展名
- (NSString *)contentTypeForImageData:(NSData *)data
{
uint8_t c;
[data getBytes:&c length:1];
switch
(c)
{
case
0xFF:
return
@
"jpeg"
;
case
0x89:
return
@
"png"
;
case
0x47:
return
@
"gif"
;
case
0x49:
case
0x4D:
return
@
"tiff"
;
case
0x52:
if
([data length] < 12) {
return
nil;
}
NSString *testString = [[NSString alloc] initWithData:[data subdataWithRange:NSMakeRange(0, 12)] encoding:NSASCIIStringEncoding];
if
([testString hasPrefix:@
"RIFF"
]
&& [testString hasSuffix:@
"WEBP"
])
{
return
@
"webp"
;
}
return
nil;
}
return
nil;
}
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53、獲取手機和app信息
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NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
CFShow(infoDictionary);
// app名稱
NSString *app_Name = [infoDictionary objectForKey:@
"CFBundleDisplayName"
];
// app版本
NSString *app_Version = [infoDictionary objectForKey:@
"CFBundleShortVersionString"
];
// app build版本
NSString *app_build = [infoDictionary objectForKey:@
"CFBundleVersion"
];
//手機***
NSString* identifierNumber = [[UIDevice currentDevice] uniqueIdentifier];
NSLog(@
"手機***: %@"
,identifierNumber);
//手機別名： 用戶定義的名稱
NSString* userPhoneName = [[UIDevice currentDevice] name];
NSLog(@
"手機別名: %@"
, userPhoneName);
//設備名稱
NSString* deviceName = [[UIDevice currentDevice] systemName];
NSLog(@
"設備名稱: %@"
,deviceName );
//手機系統版本
NSString* phoneVersion = [[UIDevice currentDevice] systemVersion];
NSLog(@
"手機系統版本: %@"
, phoneVersion);
//手機型號
NSString* phoneModel = [[UIDevice currentDevice] model];
NSLog(@
"手機型號: %@"
,phoneModel );
//地方型號 （國際化區域名稱）
NSString* localPhoneModel = [[UIDevice currentDevice] localizedModel];
NSLog(@
"國際化區域名稱: %@"
,localPhoneModel );
NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
// 當前應用名稱
NSString *appCurName = [infoDictionary objectForKey:@
"CFBundleDisplayName"
];
NSLog(@
"當前應用名稱：%@"
,appCurName);
// 當前應用軟件版本 比如：1.0.1
NSString *appCurVersion = [infoDictionary objectForKey:@
"CFBundleShortVersionString"
];
NSLog(@
"當前應用軟件版本:%@"
,appCurVersion);
// 當前應用版本號碼 int類型
NSString *appCurVersionNum = [infoDictionary objectForKey:@
"CFBundleVersion"
];
NSLog(@
"當前應用版本號碼：%@"
,appCurVersionNum);
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54、獲取一個類的所有屬性
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id LenderClass = objc_getClass(
"Lender"
);
unsigned int outCount, i;
objc_property_t *properties = class_copyPropertyList(LenderClass, &outCount);
for
(i = 0; i < outCount; i++) {
objc_property_t property = properties[i];
fprintf(stdout,
"%s %s\n"
, property_getName(property), property_getAttributes(property));
}
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55、image圓角
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- (UIImage *)circleImage
{
// NO代表透明
UIGraphicsBeginImageContextWithOptions(self.size, NO, 1);
// 獲得上下文
CGContextRef ctx = UIGraphicsGetCurrentContext();
// 添加一個圓
CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
// 方形變圓形
CGContextAddEllipseInRect(ctx, rect);
// 裁剪
CGContextClip(ctx);
// 將圖片畫上去
[self drawInRect:rect];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return
image;
}
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56、image拉伸
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+ (UIImage *)resizableImage:(NSString *)imageName
{
UIImage *image = [UIImage imageNamed:imageName];
CGFloat imageW = image.size.width;
CGFloat imageH = image.size.height;
return
[image resizableImageWithCapInsets:UIEdgeInsetsMake(imageH * 0.5, imageW * 0.5, imageH * 0.5, imageW * 0.5) resizingMode:UIImageResizingModeStretch];
}
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57、JSON字符串轉字典
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+ (NSDictionary *)parseJSONStringToNSDictionary:(NSString *)JSONString {
NSData *JSONData = [JSONString dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *responseJSON = [NSJSONSerialization JSONObjectWithData:JSONData options:NSJSONReadingMutableLeaves error:nil];
return
responseJSON;
}
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58、身份證號驗證
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- (BOOL)validateIdentityCard {
BOOL flag;
if
(self.length <= 0) {
flag = NO;
return
flag;
}
NSString *regex2 = @
"^(\\d{14}|\\d{17})(\\d|[xX])$"
;
NSPredicate *identityCardPredicate = [NSPredicate predicateWithFormat:@
"SELF MATCHES %@"
,regex2];
return
[identityCardPredicate evaluateWithObject:self];
}
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59、獲取設備mac地址
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+ (NSString *)macAddress {
int mib[6];
size_t len;
char *buf;
unsigned char *ptr;
struct if_msghdr *ifm;
struct sockaddr_dl *sdl;
mib[0] = CTL_NET;
mib[1] = AF_ROUTE;
mib[2] = 0;
mib[3] = AF_LINK;
mib[4] = NET_RT_IFLIST;
if
((mib[5] = if_nametoindex(
"en0"
)) == 0) {
printf(
"Error: if_nametoindex error\n"
);
return
NULL;
}
if
(sysctl(mib, 6, NULL, &len, NULL, 0) < 0) {
printf(
"Error: sysctl, take 1\n"
);
return
NULL;
}
if
((buf = malloc(len)) == NULL) {
printf(
"Could not allocate memory. Rrror!\n"
);
return
NULL;
}
if
(sysctl(mib, 6, buf, &len, NULL, 0) < 0) {
printf(
"Error: sysctl, take 2"
);
return
NULL;
}
ifm = (struct if_msghdr *)buf;
sdl = (struct sockaddr_dl *)(ifm + 1);
ptr = (unsigned char *)LLADDR(sdl);
NSString *outstring = [NSString stringWithFormat:@
"X:X:X:X:X:X"
,
*ptr, *(ptr+1), *(ptr+2), *(ptr+3), *(ptr+4), *(ptr+5)];
free(buf);
return
outstring;
}
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60、導入自定義字體庫
1、找到你想用的字體的 ttf 格式，拖入工程
2、在工程的plist中增加一行數組，「Fonts provided by application」
3、爲這個key添加一個item，value爲你剛纔導入的ttf文件名
4、直接使用即可：label.font = [UIFont fontWithName:@"你剛纔導入的ttf文件名" size:20.0]；
61、拿到當前正在顯示的控制器，不管是push進去的，還是present進去的都能拿到
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- (UIViewController *)getVisibleViewControllerFrom:(UIViewController*)vc {
if
([vc isKindOfClass:[UINavigationController class]]) {
return
[self getVisibleViewControllerFrom:[((UINavigationController*) vc) visibleViewController]];
}
else
if
([vc isKindOfClass:[UITabBarController class]]){
return
[self getVisibleViewControllerFrom:[((UITabBarController*) vc) selectedViewController]];
}
else
{
if
(vc.presentedViewController) {
return
[self getVisibleViewControllerFrom:vc.presentedViewController];
}
else
{
return
vc;
}
}
}
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62、runtime爲一個類動態添加屬性
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// 動態添加屬性的本質是: 讓對象的某個屬性與值產生關聯
objc_setAssociatedObject(self, WZBPlaceholderViewKey, placeholderView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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63、獲取runtime爲一個類動態添加的屬性
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objc_getAssociatedObject(self, WZBPlaceholderViewKey);
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64、KVO監聽某個對象的屬性
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// 添加監聽者
[self addObserver:self forKeyPath:property options:NSKeyValueObservingOptionNew context:nil];
// 當監聽的屬性值變化的時候會來到這個方法
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if
([keyPath isEqualToString:@
"property"
]) {
[self textViewTextChange];
}
else
{
}
}
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65、Reachability判斷網絡狀態
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NetworkStatus status = [[Reachability reachabilityForInternetConnection] currentReachabilityStatus];
if
(status == NotReachable) {
NSLog(@
"當前設備無網絡"
);
}
if
(status == ReachableViaWiFi) {
NSLog(@
"當前wifi網絡"
);
}
if
(status == NotReachable) {
NSLog(@
"當前蜂窩移動網絡"
);
}
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66、AFNetworking監聽網絡狀態
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// 監聽網絡狀況
AFNetworkReachabilityManager *mgr = [AFNetworkReachabilityManager sharedManager];
[mgr setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
switch
(status) {
case
AFNetworkReachabilityStatusUnknown:
break
;
case
AFNetworkReachabilityStatusNotReachable: {
[SVProgressHUD showInfoWithStatus:@
"當前設備無網絡"
];
}
break
;
case
AFNetworkReachabilityStatusReachableViaWiFi:
[SVProgressHUD showInfoWithStatus:@
"當前Wi-Fi網絡"
];
break
;
case
AFNetworkReachabilityStatusReachableViaWWAN:
[SVProgressHUD showInfoWithStatus:@
"當前蜂窩移動網絡"
];
break
;
default
:
break
;
}
}];
[mgr startMonitoring];
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67、透明顏色不影響子視圖透明度
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[UIColor colorWithRed: green: blue: alpha:];
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68、取圖片某一點的顏色
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if
(point.x < 0 || point.y < 0)
return
nil;
CGImageRef imageRef = self.CGImage;
NSUInteger width = CGImageGetWidth(imageRef);
NSUInteger height = CGImageGetHeight(imageRef);
if
(point.x >= width || point.y >= height)
return
nil;
unsigned char *rawData = malloc(height * width * 4);
if
(!rawData)
return
nil;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
NSUInteger bytesPerPixel = 4;
NSUInteger bytesPerRow = bytesPerPixel * width;
NSUInteger bitsPerComponent = 8;
CGContextRef context = CGBitmapContextCreate(rawData,
width,
height,
bitsPerComponent,
bytesPerRow,
colorSpace,
kCGImageAlphaPremultipliedLast
| kCGBitmapByteOrder32Big);
if
(!context) {
free(rawData);
return
nil;
}
CGColorSpaceRelease(colorSpace);
CGContextDrawImage(context, CGRectMake(0, 0, width, height), imageRef);
CGContextRelease(context);
int byteIndex = (bytesPerRow * point.y) + point.x * bytesPerPixel;
CGFloat red = (rawData[byteIndex] * 1.0) / 255.0;
CGFloat green = (rawData[byteIndex + 1] * 1.0) / 255.0;
CGFloat blue = (rawData[byteIndex + 2] * 1.0) / 255.0;
CGFloat alpha = (rawData[byteIndex + 3] * 1.0) / 255.0;
UIColor *result = nil;
result = [UIColor colorWithRed:red green:green blue:blue alpha:alpha];
free(rawData);
return
result;
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69、判斷該圖片是否有透明度通道
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- (BOOL)hasAlphaChannel
{
CGImageAlphaInfo alpha = CGImageGetAlphaInfo(self.CGImage);
return
(alpha == kCGImageAlphaFirst ||
alpha == kCGImageAlphaLast ||
alpha == kCGImageAlphaPremultipliedFirst ||
alpha == kCGImageAlphaPremultipliedLast);
}
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70、獲得灰度圖
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+ (UIImage*)covertToGrayImageFromImage:(UIImage*)sourceImage
{
int width = sourceImage.size.width;
int height = sourceImage.size.height;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();
CGContextRef context = CGBitmapContextCreate (nil,width,height,8,0,colorSpace,kCGImageAlphaNone);
CGColorSpaceRelease(colorSpace);
if
(context == NULL) {
return
nil;
}
CGContextDrawImage(context,CGRectMake(0, 0, width, height), sourceImage.CGImage);
CGImageRef contextRef = CGBitmapContextCreateImage(context);
UIImage *grayImage = [UIImage imageWithCGImage:contextRef];
CGContextRelease(context);
CGImageRelease(contextRef);
return
grayImage;
}
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71、根據bundle中的文件名讀取圖片
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+ (UIImage *)imageWithFileName:(NSString *)name {
NSString *extension = @
"png"
;
NSArray *components = [name componentsSeparatedByString:@
"."
];
if
([components count] >= 2) {
NSUInteger lastIndex = components.count - 1;
extension = [components objectAtIndex:lastIndex];
name = [name substringToIndex:(name.length-(extension.length+1))];
}
// 如果爲Retina屏幕且存在對應圖片，則返回Retina圖片，否則查找普通圖片
if
([UIScreen mainScreen].scale == 2.0) {
name = [name stringByAppendingString:@
"@2x"
];
NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:extension];
if
(path != nil) {
return
[UIImage imageWithContentsOfFile:path];
}
}
if
([UIScreen mainScreen].scale == 3.0) {
name = [name stringByAppendingString:@
"@3x"
];
NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:extension];
if
(path != nil) {
return
[UIImage imageWithContentsOfFile:path];
}
}
NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:extension];
if
(path) {
return
[UIImage imageWithContentsOfFile:path];
}
return
nil;
}
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72、合併兩個圖片
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+ (UIImage*)mergeImage:(UIImage*)firstImage withImage:(UIImage*)secondImage {
CGImageRef firstImageRef = firstImage.CGImage;
CGFloat firstWidth = CGImageGetWidth(firstImageRef);
CGFloat firstHeight = CGImageGetHeight(firstImageRef);
CGImageRef secondImageRef = secondImage.CGImage;
CGFloat secondWidth = CGImageGetWidth(secondImageRef);
CGFloat secondHeight = CGImageGetHeight(secondImageRef);
CGSize mergedSize = CGSizeMake(MAX(firstWidth, secondWidth), MAX(firstHeight, secondHeight));
UIGraphicsBeginImageContext(mergedSize);
[firstImage drawInRect:CGRectMake(0, 0, firstWidth, firstHeight)];
[secondImage drawInRect:CGRectMake(0, 0, secondWidth, secondHeight)];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return
image;
}
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73、根據bundle中的圖片名創建imageview
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+ (id)imageViewWithImageNamed:(NSString*)imageName
{
return
[[UIImageView alloc] initWithImage:[UIImage imageNamed:imageName]];
}
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74、爲imageView添加倒影
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CGRect frame = self.frame;
frame.origin.y += (frame.size.height + 1);
UIImageView *reflectionImageView = [[UIImageView alloc] initWithFrame:frame];
self.clipsToBounds = TRUE;
reflectionImageView.contentMode = self.contentMode;
[reflectionImageView setImage:self.image];
reflectionImageView.transform = CGAffineTransformMakeScale(1.0, -1.0);
CALayer *reflectionLayer = [reflectionImageView layer];
CAGradientLayer *gradientLayer = [CAGradientLayer layer];
gradientLayer.bounds = reflectionLayer.bounds;
gradientLayer.position = CGPointMake(reflectionLayer.bounds.size.width / 2, reflectionLayer.bounds.size.height * 0.5);
gradientLayer.colors = [NSArray arrayWithObjects:
(id)[[UIColor clearColor] CGColor],
(id)[[UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:0.3] CGColor], nil];
gradientLayer.startPoint = CGPointMake(0.5,0.5);
gradientLayer.endPoint = CGPointMake(0.5,1.0);
reflectionLayer.mask = gradientLayer;
[self.superview addSubview:reflectionImageView];
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75、畫水印
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// 畫水印
- (void) setImage:(UIImage *)image withWaterMark:(UIImage *)mark inRect:(CGRect)rect
{
if
([[[UIDevice currentDevice] systemVersion] floatValue] >= 4.0)
{
UIGraphicsBeginImageContextWithOptions(self.frame.size, NO, 0.0);
}
//原圖
[image drawInRect:self.bounds];
//水印圖
[mark drawInRect:rect];
UIImage *newPic = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
self.image = newPic;
}
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76、讓label的文字內容顯示在左上／右上／左下／右下／中心頂／中心底部
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