Captain9911

SDWebImage的常用方法

  • Oct 31, 2022

关键词：SDWebImage

同时缓存多张图片

#import <SDWebImage/SDWebImagePrefetcher.h>

[[SDWebImagePrefetcher sharedImagePrefetcher] prefetchURLs:urlArray];

使用缓存图片

#import <SDWebImage/UIImageView+WebCache.h>

[_wMapImageView sd_setImageWithURL:data.imageUrl placeholderImage:kPlaceholderImage];

单独异步下载图片

不会缓存

SDWebImageDownloader *downloader = [SDWebImageDownloader sharedDownloader];
[downloader downloadImageWithURL:imageURL options:0 progress:^(NSInteger receivedSize, NSInteger expectedSize, NSURL * _Nullable targetURL) {
    // progression tracking code
    
} completed:^(UIImage * _Nullable image, NSData * _Nullable data, NSError * _Nullable error, BOOL finished) {
    if (image && finished) {
        // do something with image
    }
}];

单独异步缓存图片

//缓存到内存和磁盘
[[SDImageCache sharedImageCache] storeImage:myImage forKey:myCacheKey];
//只缓存到内存
[[SDImageCache sharedImageCache] storeImage:myImage forKey:myCacheKey toDisk:NO];

自定义缓存key

有时候url中的一部分是动态变化的，只需要把不变的部分作为key

SDWebImageManager.sharedManager.cacheKeyFilter = ^(NSURL *url) {
 url = [[NSURL alloc] initWithScheme:url.scheme host:url.host path:url.path];
 return [url absoluteString];
};
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