我在我的imageView上使用SDWebImage进行以下调用,它在Swift2上运行良好,但在上出错XCode8beta5使用Swift3编译:imageView.sd_setImage(with:url,placeholderImage:placeholder,completed:{(image:UIImage?,error:Error?,cacheType:SDImageCacheType,imageURL:URL?)in...});错误是:Ambiguoususeof'sd_setImage(with:placeholderImage:completed:)'我怀疑已完成的处