关于你的SDWebImageManager

[Xmanzn]

@implementation SDWebImageManager

• (id)sharedManager {
  static dispatch_once_t once;
  static id instance;
  dispatch_once(&once, ^{
  instance = [self new];
  });
  return instance;

  @dsxNiubility @ NSURLCache *cache = [NSURLCache sharedURLCache];

}
你在这里自己加的NSURLCache *cache = [NSURLCache sharedURLCache]; 有必要么

[dsxNiubility]

恩，可以直接去SDImageCache里取的。当时对原生的api比较熟，顺手就那么写了。