SDWebImage源碼解析(二)
1 概述
SDWebImage使用了不少工具類來對圖片的處理。好比獲取圖片類型、圖片放大縮小、GIF圖片處理、圖片解壓縮處理等。接下來我就要分析下面這幾個工具類的實現。html
2 NSData+ImageContentType分析
這個類提供了一個類方法sd_imageFormatForImageData。經過這個方法傳入圖片的NSData數據，而後返回圖片類型。圖片類型經過SDImageFormat來定義。git
/**
不一樣圖片類型的枚舉
- SDImageFormatUndefined: 未知
- SDImageFormatJPEG: JPG
- SDImageFormatPNG: PNG
- SDImageFormatGIF: GIF
- SDImageFormatTIFF: TIFF
- SDImageFormatWebP: WEBP
*/
typedef NS_ENUM(NSInteger, SDImageFormat) {
SDImageFormatUndefined = -1,
SDImageFormatJPEG = 0,
SDImageFormatPNG,
SDImageFormatGIF,
SDImageFormatTIFF,
SDImageFormatWebP
};
/**
根據圖片NSData獲取圖片的類型
@param data NSData數據
@return 圖片數據類型
*/
+ (SDImageFormat)sd_imageFormatForImageData:(nullable NSData *)data {
if (!data) {
return SDImageFormatUndefined;
}
uint8_t c;
//獲取圖片數據的第一個字節數據
[data getBytes:&c length:1];
//根據字母的ASC碼比較
switch (c) {
case 0xFF:
return SDImageFormatJPEG;
case 0x89:
return SDImageFormatPNG;
case 0x47:
return SDImageFormatGIF;
case 0x49:
case 0x4D:
return SDImageFormatTIFF;
case 0x52:
// R as RIFF for WEBP
if (data.length < 12) {
return SDImageFormatUndefined;
}
NSString *testString = [[NSString alloc] initWithData:[data subdataWithRange:NSMakeRange(0, 12)] encoding:NSASCIIStringEncoding];
if ([testString hasPrefix:@"RIFF"] && [testString hasSuffix:@"WEBP"]) {
return SDImageFormatWebP;
}
}
return SDImageFormatUndefined;
}
3 SDWebImageCompat分析
SDWebImageCompat就提供一個全局方法SDScaledImageForKey。這個方法根據原始圖片繪製一張放大或者縮小的圖片。github
/**
給定一張圖片，經過scale屬性返回一個放大的圖片。
@param key 圖片名稱
@param image 資源圖片
@return 處理之後的圖片
*/
inline UIImage *SDScaledImageForKey(NSString * _Nullable key, UIImage * _Nullable image) {
//異常處理
if (!image) {
return nil;
}
#if SD_MAC
return image;
#elif SD_UIKIT || SD_WATCH
//若是是動態圖片，好比GIF圖片，則迭代處理
if ((image.images).count > 0) {
NSMutableArray<UIImage *> *scaledImages = [NSMutableArray array];
//迭代處理每一張圖片
for (UIImage *tempImage in image.images) {
[scaledImages addObject:SDScaledImageForKey(key, tempImage)];
}
//把處理結束的圖片再合成一張動態圖片
return [UIImage animatedImageWithImages:scaledImages duration:image.duration];
}
else {//非動態圖片
#if SD_WATCH
if ([[WKInterfaceDevice currentDevice] respondsToSelector:@selector(screenScale)]) {
#elif SD_UIKIT
if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
#endif
CGFloat scale = 1;
// 「@2x.png」的長度爲7，因此此處添加了這個判斷，很巧妙
if (key.length >= 8) {
NSRange range = [key rangeOfString:@"@2x."];
if (range.location != NSNotFound) {
scale = 2.0;
}
range = [key rangeOfString:@"@3x."];
if (range.location != NSNotFound) {
scale = 3.0;
}
}
//返回對應分辨率下面的圖片
UIImage *scaledImage = [[UIImage alloc] initWithCGImage:image.CGImage scale:scale orientation:image.imageOrientation];
image = scaledImage;
}
return image;
}
#endif
}
4 UIImage+MultiFormat分類分析
UIImage+MultiFormat分類實現了NSData與UIImage對象之間的相互轉換。而且是根據圖片類型作轉換。好比GIF的UIImage轉換爲GIF格式的NSData。
而且還有UIImage的Orientation和alpha的處理。chrome
/**
根據image的data數據。生成對應的image對象
@param data 圖片的數據
@return image對象
*/
+ (nullable UIImage *)sd_imageWithData:(nullable NSData *)data {
if (!data) {
return nil;
}
UIImage *image;
//獲取data的圖片類型，png，gif，jpg
SDImageFormat imageFormat = [NSData sd_imageFormatForImageData:data];
if (imageFormat == SDImageFormatGIF) {
//gif處理：返回一張只包含數據第一張image 的gif圖片
image = [UIImage sd_animatedGIFWithData:data];
}
#ifdef SD_WEBP
else if (imageFormat == SDImageFormatWebP)
{
image = [UIImage sd_imageWithWebPData:data];
}
#endif
else {
image = [[UIImage alloc] initWithData:data];
#if SD_UIKIT || SD_WATCH
//獲取方向
UIImageOrientation orientation = [self sd_imageOrientationFromImageData:data];
//若是不是向上的，還須要再次生成圖片
if (orientation != UIImageOrientationUp) {
image = [UIImage imageWithCGImage:image.CGImage
scale:image.scale
orientation:orientation];
}
#endif
}
return image;
}
#if SD_UIKIT || SD_WATCH
/**
根據圖片數據獲取圖片的方向
@param imageData 圖片數據
@return 方向
*/
+(UIImageOrientation)sd_imageOrientationFromImageData:(nonnull NSData *)imageData {
//默認是向上的
UIImageOrientation result = UIImageOrientationUp;
CGImageSourceRef imageSource = CGImageSourceCreateWithData((__bridge CFDataRef)imageData, NULL);
if (imageSource) {
//獲取圖片的屬性列表
CFDictionaryRef properties = CGImageSourceCopyPropertiesAtIndex(imageSource, 0, NULL);
if (properties) {
CFTypeRef val;
int exifOrientation;
//獲取圖片方向
val = CFDictionaryGetValue(properties, kCGImagePropertyOrientation);
if (val) {
CFNumberGetValue(val, kCFNumberIntType, &exifOrientation);
result = [self sd_exifOrientationToiOSOrientation:exifOrientation];
} // else - if it's not set it remains at up
CFRelease((CFTypeRef) properties);
} else {
//NSLog(@"NO PROPERTIES, FAIL");
}
CFRelease(imageSource);
}
return result;
}
/**
根據不一樣的值返回不一樣的圖片方向
@param exifOrientation 輸入值
@return 圖片的方向
*/
+ (UIImageOrientation) sd_exifOrientationToiOSOrientation:(int)exifOrientation {
UIImageOrientation orientation = UIImageOrientationUp;
switch (exifOrientation) {
case 1:
orientation = UIImageOrientationUp;
break;
case 3:
orientation = UIImageOrientationDown;
break;
case 8:
orientation = UIImageOrientationLeft;
break;
case 6:
orientation = UIImageOrientationRight;
break;
case 2:
orientation = UIImageOrientationUpMirrored;
break;
case 4:
orientation = UIImageOrientationDownMirrored;
break;
case 5:
orientation = UIImageOrientationLeftMirrored;
break;
case 7:
orientation = UIImageOrientationRightMirrored;
break;
default:
break;
}
return orientation;
}
#endif
- (nullable NSData *)sd_imageData {
return [self sd_imageDataAsFormat:SDImageFormatUndefined];
}
/**
根據指定的圖片類型，把image對象轉換爲對應格式的data
@param imageFormat 指定的image格式
@return 返回data對象
*/
- (nullable NSData *)sd_imageDataAsFormat:(SDImageFormat)imageFormat {
NSData *imageData = nil;
if (self) {
#if SD_UIKIT || SD_WATCH
int alphaInfo = CGImageGetAlphaInfo(self.CGImage);
//是否有透明度
BOOL hasAlpha = !(alphaInfo == kCGImageAlphaNone ||
alphaInfo == kCGImageAlphaNoneSkipFirst ||
alphaInfo == kCGImageAlphaNoneSkipLast);
//只有png圖片有alpha屬性
BOOL usePNG = hasAlpha;
// the imageFormat param has priority here. But if the format is undefined, we relly on the alpha channel
//是不是PNG類型的圖片
if (imageFormat != SDImageFormatUndefined) {
usePNG = (imageFormat == SDImageFormatPNG);
}
//根據不一樣的圖片類型獲取到對應的圖片data
if (usePNG) {
imageData = UIImagePNGRepresentation(self);
} else {
imageData = UIImageJPEGRepresentation(self, (CGFloat)1.0);
}
#else
NSBitmapImageFileType imageFileType = NSJPEGFileType;
if (imageFormat == SDImageFormatGIF) {
imageFileType = NSGIFFileType;
} else if (imageFormat == SDImageFormatPNG) {
imageFileType = NSPNGFileType;
}
imageData = [NSBitmapImageRep representationOfImageRepsInArray:self.representations
usingType:imageFileType
properties:@{}];
#endif
}
return imageData;
}
5 UIImage+GIF分類分析
UIImage+GIF實現了對GIF圖片的NSData的處理。而且處理方法就是取出GIF圖片的第一張UIImage來顯示。若是真的要顯示動態圖片的話，咱們須要使用FLAnimatedImageView來顯示。app
/**
根據gif圖片的data生成對應的gif的UIImage對象。並且只會取GIF圖片的第一張UIImage。
@param data gif圖片的data對象
@return 生成的image對象。這裏只獲取gif圖片的第一張圖像，若是要實現gif完整圖像，使用FLAnimatedImageView
*/
+ (UIImage *)sd_animatedGIFWithData:(NSData *)data {
if (!data) {
return nil;
}
CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)data, NULL);
//獲取GIF圖片包含的UIImage數量
size_t count = CGImageSourceGetCount(source);
UIImage *staticImage;
//若是隻有一張UIImage
if (count <= 1) {
staticImage = [[UIImage alloc] initWithData:data];
} else {
#if SD_WATCH
CGFloat scale = 1;
scale = [WKInterfaceDevice currentDevice].screenScale;
#elif SD_UIKIT
CGFloat scale = 1;
scale = [UIScreen mainScreen].scale;
#endif
//獲取第一張UIImage對象
CGImageRef CGImage = CGImageSourceCreateImageAtIndex(source, 0, NULL);
#if SD_UIKIT || SD_WATCH
//獲取gif圖片的第一張圖片
UIImage *frameImage = [UIImage imageWithCGImage:CGImage scale:scale orientation:UIImageOrientationUp];
//用第一張圖片生成一個新的gif圖片
staticImage = [UIImage animatedImageWithImages:@[frameImage] duration:0.0f];
#elif SD_MAC
staticImage = [[UIImage alloc] initWithCGImage:CGImage size:NSZeroSize];
#endif
CGImageRelease(CGImage);
}
CFRelease(source);
return staticImage;
}
/**
判斷一張圖片是否是GIF圖片
@return bool值
*/
- (BOOL)isGIF {
return (self.images != nil);
}
6 SDWebImageDecoder分析
經過這個類實現圖片的解壓縮操做。對於太大的圖片，先按照必定比例縮小圖片而後再解壓縮。工具
#if SD_UIKIT || SD_WATCH
//每一個像素佔用的字節數
static const size_t kBytesPerPixel = 4;
//色彩空間佔用的字節數
static const size_t kBitsPerComponent = 8;
/**
解壓縮圖片
@param image UIImage對象
@return 返回解壓縮之後的圖片
*/
+ (nullable UIImage *)decodedImageWithImage:(nullable UIImage *)image {
//圖片是否可以加壓縮
if (![UIImage shouldDecodeImage:image]) {
return image;
}
// autorelease the bitmap context and all vars to help system to free memory when there are memory warning.
// on iOS7, do not forget to call [[SDImageCache sharedImageCache] clearMemory];
/*
*解壓縮操做放入一個自動釋放池裏面。一遍自動釋放全部的變量。
*/
@autoreleasepool{
CGImageRef imageRef = image.CGImage;
//獲取圖片的色彩空間
CGColorSpaceRef colorspaceRef = [UIImage colorSpaceForImageRef:imageRef];
//寬度和高度
size_t width = CGImageGetWidth(imageRef);
size_t height = CGImageGetHeight(imageRef);
//圖片佔用的字節數
size_t bytesPerRow = kBytesPerPixel * width;
// kCGImageAlphaNone is not supported in CGBitmapContextCreate.
// Since the original image here has no alpha info, use kCGImageAlphaNoneSkipLast
// to create bitmap graphics contexts without alpha info.
//建立一個繪製圖片的上下文
CGContextRef context = CGBitmapContextCreate(NULL,
width,
height,
kBitsPerComponent,
bytesPerRow,
colorspaceRef,
kCGBitmapByteOrderDefault|kCGImageAlphaNoneSkipLast);
if (context == NULL) {
return image;
}
// Draw the image into the context and retrieve the new bitmap image without alpha
//繪製一個和圖片大小同樣的圖片
CGContextDrawImage(context, CGRectMake(0, 0, width, height), imageRef);
//建立一個麼有alpha通道的圖片
CGImageRef imageRefWithoutAlpha = CGBitmapContextCreateImage(context);
//獲得解壓縮之後的圖片
UIImage *imageWithoutAlpha = [UIImage imageWithCGImage:imageRefWithoutAlpha
scale:image.scale
orientation:image.imageOrientation];
CGContextRelease(context);
CGImageRelease(imageRefWithoutAlpha);
return imageWithoutAlpha;
}
}
/*
*定義一張圖片能夠佔用的最大空間
*/
static const CGFloat kDestImageSizeMB = 60.0f;
static const CGFloat kSourceImageTileSizeMB = 20.0f;
static const CGFloat kBytesPerMB = 1024.0f * 1024.0f;
//1MB能夠存儲多少像素
static const CGFloat kPixelsPerMB = kBytesPerMB / kBytesPerPixel;
//若是像素小於這個值，則不解壓縮
static const CGFloat kDestTotalPixels = kDestImageSizeMB * kPixelsPerMB;
static const CGFloat kTileTotalPixels = kSourceImageTileSizeMB * kPixelsPerMB;
static const CGFloat kDestSeemOverlap = 2.0f; // the numbers of pixels to overlap the seems where tiles meet.
/**
若是原始圖片佔用的空間太大。則按照必定的比例解壓縮。從而不讓解壓縮之後的圖片佔用的空間太大。
@param image UIImage對象
@return 返回處理結束的UIImage對象
*/
+ (nullable UIImage *)decodedAndScaledDownImageWithImage:(nullable UIImage *)image {
//圖片是否支持解壓縮
if (![UIImage shouldDecodeImage:image]) {
return image;
}
//圖片不須要處理。直接解壓縮
if (![UIImage shouldScaleDownImage:image]) {
return [UIImage decodedImageWithImage:image];
}
CGContextRef destContext;
// autorelease the bitmap context and all vars to help system to free memory when there are memory warning.
// on iOS7, do not forget to call [[SDImageCache sharedImageCache] clearMemory];
@autoreleasepool {
CGImageRef sourceImageRef = image.CGImage;
CGSize sourceResolution = CGSizeZero;
//獲取原始圖片的寬度和高度
sourceResolution.width = CGImageGetWidth(sourceImageRef);
sourceResolution.height = CGImageGetHeight(sourceImageRef);
//獲取原始圖片的總像素
float sourceTotalPixels = sourceResolution.width * sourceResolution.height;
// Determine the scale ratio to apply to the input image
// that results in an output image of the defined size.
// see kDestImageSizeMB, and how it relates to destTotalPixels.
//根據必定的比例設置目標圖片的寬度和高度
float imageScale = kDestTotalPixels / sourceTotalPixels;
CGSize destResolution = CGSizeZero;
destResolution.width = (int)(sourceResolution.width*imageScale);
destResolution.height = (int)(sourceResolution.height*imageScale);
// current color space
//獲取原始圖片的像素空間。默認是RGB
CGColorSpaceRef colorspaceRef = [UIImage colorSpaceForImageRef:sourceImageRef];
//每一行像素佔用的內存空間大小
size_t bytesPerRow = kBytesPerPixel * destResolution.width;
// Allocate enough pixel data to hold the output image.
//目標圖片佔用的總內存空間大小。一行佔用內存空間大小*高度
void* destBitmapData = malloc( bytesPerRow * destResolution.height );
if (destBitmapData == NULL) {
return image;
}
//根據各類設置建立一個上下文環境
destContext = CGBitmapContextCreate(destBitmapData,
destResolution.width,
destResolution.height,
kBitsPerComponent,
bytesPerRow,
colorspaceRef,
kCGBitmapByteOrderDefault|kCGImageAlphaNoneSkipLast);
if (destContext == NULL) {
free(destBitmapData);
return image;
}
//設置目標圖片的質量
CGContextSetInterpolationQuality(destContext, kCGInterpolationHigh);
CGRect sourceTile = CGRectZero;
sourceTile.size.width = sourceResolution.width;
sourceTile.size.height = (int)(kTileTotalPixels / sourceTile.size.width );
sourceTile.origin.x = 0.0f;
CGRect destTile;
destTile.size.width = destResolution.width;
destTile.size.height = sourceTile.size.height * imageScale;
destTile.origin.x = 0.0f;
float sourceSeemOverlap = (int)((kDestSeemOverlap/destResolution.height)*sourceResolution.height);
CGImageRef sourceTileImageRef;
int iterations = (int)( sourceResolution.height / sourceTile.size.height );
int remainder = (int)sourceResolution.height % (int)sourceTile.size.height;
if(remainder) {
iterations++;
}
// Add seem overlaps to the tiles, but save the original tile height for y coordinate calculations.
float sourceTileHeightMinusOverlap = sourceTile.size.height;
sourceTile.size.height += sourceSeemOverlap;
destTile.size.height += kDestSeemOverlap;
for( int y = 0; y < iterations; ++y ) {
@autoreleasepool {
sourceTile.origin.y = y * sourceTileHeightMinusOverlap + sourceSeemOverlap;
destTile.origin.y = destResolution.height - (( y + 1 ) * sourceTileHeightMinusOverlap * imageScale + kDestSeemOverlap);
sourceTileImageRef = CGImageCreateWithImageInRect( sourceImageRef, sourceTile );
if( y == iterations - 1 && remainder ) {
float dify = destTile.size.height;
destTile.size.height = CGImageGetHeight( sourceTileImageRef ) * imageScale;
dify -= destTile.size.height;
destTile.origin.y += dify;
}
CGContextDrawImage( destContext, destTile, sourceTileImageRef );
CGImageRelease( sourceTileImageRef );
}
}
CGImageRef destImageRef = CGBitmapContextCreateImage(destContext);
CGContextRelease(destContext);
if (destImageRef == NULL) {
return image;
}
//生成處理結束之後的圖片
UIImage *destImage = [UIImage imageWithCGImage:destImageRef scale:image.scale orientation:image.imageOrientation];
CGImageRelease(destImageRef);
if (destImage == nil) {
return image;
}
return destImage;
}
}
/**
imge是否可以加壓縮
@param image 圖片
@return 可否解壓縮
*/
+ (BOOL)shouldDecodeImage:(nullable UIImage *)image {
// Prevent "CGBitmapContextCreateImage: invalid context 0x0" error
if (image == nil) {
return NO;
}
// do not decode animated images
//若是是動態圖片不處理
if (image.images != nil) {
return NO;
}
CGImageRef imageRef = image.CGImage;
//獲取image的alpha通道。經過通道獲取圖片數據
CGImageAlphaInfo alpha = CGImageGetAlphaInfo(imageRef);
BOOL anyAlpha = (alpha == kCGImageAlphaFirst ||
alpha == kCGImageAlphaLast ||
alpha == kCGImageAlphaPremultipliedFirst ||
alpha == kCGImageAlphaPremultipliedLast);
// do not decode images with alpha
//若是有alpha通道值，則不處理
if (anyAlpha) {
return NO;
}
return YES;
}
/**
是否須要減小原始圖片的大小
@param image UIImage對象
@return 是否支持scale
*/
+ (BOOL)shouldScaleDownImage:(nonnull UIImage *)image {
BOOL shouldScaleDown = YES;
CGImageRef sourceImageRef = image.CGImage;
CGSize sourceResolution = CGSizeZero;
sourceResolution.width = CGImageGetWidth(sourceImageRef);
sourceResolution.height = CGImageGetHeight(sourceImageRef);
//圖片總共像素
float sourceTotalPixels = sourceResolution.width * sourceResolution.height;
//若是圖片的總像素大於必定比例，則須要作簡化處理
float imageScale = kDestTotalPixels / sourceTotalPixels;
if (imageScale < 1) {
shouldScaleDown = YES;
} else {
shouldScaleDown = NO;
}
return shouldScaleDown;
}
/**
獲取圖片的色彩空間
@param imageRef 圖片
@return 色彩空間
*/
+ (CGColorSpaceRef)colorSpaceForImageRef:(CGImageRef)imageRef {
// current
CGColorSpaceModel imageColorSpaceModel = CGColorSpaceGetModel(CGImageGetColorSpace(imageRef));
CGColorSpaceRef colorspaceRef = CGImageGetColorSpace(imageRef);
BOOL unsupportedColorSpace = (imageColorSpaceModel == kCGColorSpaceModelUnknown ||
imageColorSpaceModel == kCGColorSpaceModelMonochrome ||
imageColorSpaceModel == kCGColorSpaceModelCMYK ||
imageColorSpaceModel == kCGColorSpaceModelIndexed);
if (unsupportedColorSpace) {
colorspaceRef = CGColorSpaceCreateDeviceRGB();
CFAutorelease(colorspaceRef);
}
return colorspaceRef;
}
#elif SD_MAC
+ (nullable UIImage *)decodedImageWithImage:(nullable UIImage *)image {
return image;
}
+ (nullable UIImage *)decodedAndScaledDownImageWithImage:(nullable UIImage *)image {
return image;
}
7 總結
下面是幾個分類工具的使用。ui
/**
根據圖片數據獲取圖片類型
*/
- (IBAction)getImageType:(id)sender {
NSData *imageData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"rock.gif" ofType:nil]];
SDImageFormat formate = [NSData sd_imageFormatForImageData:imageData];
NSString *message = [NSString stringWithFormat:@"%d",formate];
showMessage(message,self);
}
/**
獲取一張圖片對應的兩倍或者三倍屏幕對應的圖片
*/
- (IBAction)getScaleImage:(id)sender {
UIImage *sourceImage = [UIImage imageNamed:@"2.png"];
UIImage *dis2ScaleImage = SDScaledImageForKey(@"dist@2x.png", sourceImage);
UIImage *dis3ScaleImage = SDScaledImageForKey(@"dist@3x.png", sourceImage);
NSString *documentPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];
//NSLog(@"document:%@",documentPath);
NSString *path1 = [documentPath stringByAppendingPathComponent:@"dist.png"];
[UIImagePNGRepresentation(sourceImage) writeToFile:path1 atomically:YES];
NSString *path2 = [documentPath stringByAppendingPathComponent:@"dist@2x.png"];
[UIImagePNGRepresentation(dis2ScaleImage) writeToFile:path2 atomically:YES];
NSString *path3 = [documentPath stringByAppendingPathComponent:@"dist@3x.png"];
[UIImagePNGRepresentation(dis3ScaleImage) writeToFile:path3 atomically:YES];
}
/**
解壓縮圖片
@param sender 解壓縮圖片
*/
- (IBAction)unZipImage:(id)sender {
UIImage *sourceImage = [UIImage imageNamed:@"2.png"];
UIImage *distImage = [UIImage decodedAndScaledDownImageWithImage:sourceImage];
NSString *documentPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];
NSString *path1 = [documentPath stringByAppendingPathComponent:@"distImage.png"];
[UIImagePNGRepresentation(distImage) writeToFile:path1 atomically:YES];
NSString *path2 = [documentPath stringByAppendingPathComponent:@"sourceImage.png"];
[UIImagePNGRepresentation(sourceImage) writeToFile:path2 atomically:YES];
}
相關文章
- 1. SDWebImage 源碼解析
- 2. SDWebImage源碼解析
- 3. SDWebImage 源碼解讀（二）：Manager
- 4. SDWebImage源碼解析(一)
- 5. SDWebImage源碼解析(三)
- 6. SDWebImage源碼解析(四)
- 7. SDWebImage 源碼分析
- 8. SDWebImage源碼分析
- 9. SDWebImage源碼解析之SDWebImageManager的註解
- 10. SDWebImage源碼解讀
- 更多相關文章...
- • XML DOM 解析器 - XML DOM 教程
- • TCP報文格式解析 - TCP/IP教程
- • Java Agent入門實戰（二）-Instrumentation源碼概述
- • Scala 中文亂碼解決
相關標籤/搜索
每日一句
-
每一个你不满意的现在，都有一个你没有努力的曾经。
最新文章
- 1. eclipse設置粘貼字符串自動轉義
- 2. android客戶端學習-啓動模擬器異常Emulator: failed to initialize HAX: Invalid argument
- 3. android.view.InflateException: class com.jpardogo.listbuddies.lib.views.ListBuddiesLayout問題
- 4. MYSQL8.0數據庫恢復 MYSQL8.0ibd數據恢復 MYSQL8.0恢復數據庫
- 5. 你本是一個肉體，是什麼驅使你前行【1】
- 6. 2018.04.30
- 7. 2018.04.30
- 8. 你本是一個肉體，是什麼驅使你前行【3】
- 9. 你本是一個肉體，是什麼驅使你前行【2】
- 10. 【資訊】LocalBitcoins達到每週交易比特幣的7年低點
歡迎關注本站公眾號,獲取更多信息
