如何從SDWebImage獲取圖像大小？

Question

我正在使用SDWebImage從url獲取圖像。 我想獲得遠程圖像的大小，以便進行一些布局計算。 由於我只知道圖像的url，我如何從SDWebImage對象中獲取它？

Answer 1

請嘗試這個，它可能適合你

-(UIImage *)downloadImageAsync:(NSString *)imageKey
 {
     NSLog(@"image key : %@",imageKey);
      __block UIImage *returnedImage;
     SDWebImageManager *manager = [SDWebImageManager sharedManager];
     [manager downloadWithURL:[NSURL URLWithString:imageKey] options:0 progress:^(NSUInteger receivedSize, long long expectedSize){
    NSLog(@"received size %d expected size %lld", receivedSize, expectedSize);

    }completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType,BOOL finished){
      if(image && finished) {
        returnedImage = image;
      }
   }];

   if(returnedImage == nil) {
      NSLog(@"Returned Image Nil");
   }
    return returnedImage;
}