__weaktypeof(cell) weakCell= cell;
[cell.specialPerformanceProductImageViewsd_setImageWithURL:[NSURLURLWithString:[productImageUrlEncodedURLString]]placeholderImage:[UIImageimageNamed:@"default_liebiao"]options:SDWebImageRetryFailed|SDWebImageLowPrioritycompleted:^(UIImage*image,NSError*error,SDImageCacheTypecacheType,NSURL*imageURL)
{
if(image && cacheType ==SDImageCacheTypeNone)
{
weakCell.specialPerformanceProductImageView.alpha=0.0f;
[UIViewanimateWithDuration:1.0animations:^{
weakCell.specialPerformanceProductImageView.alpha=1.0f;
}];
}else
{
weakCell.specialPerformanceProductImageView.alpha=1.0f;
}
}];
//改成到库里面的方案
https://segmentfault.com/q/1010000007486755【经验证 向上滑 还有点问题。要多加判断。】
