[[SDWebImageDownloader sharedDownloader] downloadImageWithURL:photo.imamgeURL options:0 progress: ^(NSInteger receivedSize, NSInteger expectedSize) { float progress = [@(receivedSize) floatValue]/[@(expectedSize) floatValue]; progressView.progress = progress; } completed:^(UIImage *image, NSData *data, NSError *error, BOOL finished) { if( error ){ return; } if( finished ){ //dispatch_afterを使って遅延させ