ibireme/YYWebImage

// load from remote url
imageView.yy_imageURL = [NSURL URLWithString:@"http://github.com/logo.png"];
	
// load from local url
imageView.yy_imageURL = [NSURL fileURLWithPath:@"/tmp/logo.png"];

// just replace `UIImageView` with `YYAnimatedImageView`
UIImageView *imageView = [YYAnimatedImageView new];
imageView.yy_imageURL = [NSURL URLWithString:@"http://github.com/ani.webp"];

// progressive
[imageView yy_setImageWithURL:url options:YYWebImageOptionProgressive];
	
// progressive with blur and fade animation (see the demo at the top of this page)
[imageView yy_setImageWithURL:url options:YYWebImageOptionProgressiveBlur ｜ YYWebImageOptionSetImageWithFadeAnimation];

// 1. download image from remote
// 2. get download progress
// 3. resize image and add round corner
// 4. set image with a fade animation
	
[imageView yy_setImageWithURL:url
   placeholder:nil
   options:YYWebImageOptionSetImageWithFadeAnimation
   progress:^(NSInteger receivedSize, NSInteger expectedSize) {
       progress = (float)receivedSize / expectedSize;
   }
   transform:^UIImage *(UIImage *image, NSURL *url) {
       image = [image yy_imageByResizeToSize:CGSizeMake(100, 100) contentMode:UIViewContentModeCenter];
       return [image yy_imageByRoundCornerRadius:10];
   }
   completion:^(UIImage *image, NSURL *url, YYWebImageFromType from, YYWebImageStage stage, NSError *error) {
       if (from == YYWebImageFromDiskCache) {
           NSLog(@"load from disk cache");
       }
   }];

YYImageCache *cache = [YYWebImageManager sharedManager].cache;
    
// get cache capacity
cache.memoryCache.totalCost;
cache.memoryCache.totalCount;
cache.diskCache.totalCost;
cache.diskCache.totalCount;
    
// clear cache
[cache.memoryCache removeAllObjects];
[cache.diskCache removeAllObjects];
    
// clear disk cache with progress
[cache.diskCache removeAllObjectsWithProgressBlock:^(int removedCount, int totalCount) {
   // progress
} endBlock:^(BOOL error) {
   // end
}];

// 加载网络图片
imageView.yy_imageURL = [NSURL URLWithString:@"http://github.com/logo.png"];
	
// 加载本地图片
imageView.yy_imageURL = [NSURL fileURLWithPath:@"/tmp/logo.png"];

// 只需要把 `UIImageView` 替换为 `YYAnimatedImageView` 即可。
UIImageView *imageView = [YYAnimatedImageView new];
imageView.yy_imageURL = [NSURL URLWithString:@"http://github.com/ani.webp"];

// 渐进式：边下载边显示
[imageView yy_setImageWithURL:url options:YYWebImageOptionProgressive];
	
// 渐进式加载，增加模糊效果和渐变动画 （见本页最上方的GIF演示）
[imageView yy_setImageWithURL:url options:YYWebImageOptionProgressiveBlur ｜ YYWebImageOptionSetImageWithFadeAnimation];

// 1. 下载图片
// 2. 获得图片下载进度
// 3. 调整图片大小、加圆角
// 4. 显示图片时增加一个淡入动画，以获得更好的用户体验
	
[imageView yy_setImageWithURL:url
   placeholder:nil
   options:YYWebImageOptionSetImageWithFadeAnimation
   progress:^(NSInteger receivedSize, NSInteger expectedSize) {
       progress = (float)receivedSize / expectedSize;
   }
   transform:^UIImage *(UIImage *image, NSURL *url) {
       image = [image yy_imageByResizeToSize:CGSizeMake(100, 100) contentMode:UIViewContentModeCenter];
       return [image yy_imageByRoundCornerRadius:10];
   }
   completion:^(UIImage *image, NSURL *url, YYWebImageFromType from, YYWebImageStage stage, NSError *error) {
       if (from == YYWebImageFromDiskCache) {
           NSLog(@"load from disk cache");
       }
   }];

YYImageCache *cache = [YYWebImageManager sharedManager].cache;
    
// 获取缓存大小
cache.memoryCache.totalCost;
cache.memoryCache.totalCount;
cache.diskCache.totalCost;
cache.diskCache.totalCount;
    
// 清空缓存
[cache.memoryCache removeAllObjects];
[cache.diskCache removeAllObjects];
    
// 清空磁盘缓存，带进度回调
[cache.diskCache removeAllObjectsWithProgressBlock:^(int removedCount, int totalCount) {
   // progress
} endBlock:^(BOOL error) {
   // end
}];