ios - 图像未加载图像

Question

我只想为UIButton设置图像并为其创建一个IBOutlet。我在它上面有一个加载程序，当加载图像时，加载程序将停止并为该按钮分配一个新图像。调用代码时，占位符图像将保留，并且 url 图像不会加载

  [_Image1 sd_setBackgroundImageWithURL:[NSURL URLWithString:[arrayGallery valueForKey:@"link"][0]] forState:UIControlStateNormal placeholderImage:[UIImage imageNamed:@"blurred-background"] completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
        [_ImageLoader1 stopAnimating];
        [_ImageLoader1 removeFromSuperview];
    }];

Answer 1

您正在使用完成 block 从 url 下载图像。所以你需要按照下面的方式做。

 [_Image1 sd_setBackgroundImageWithURL:[NSURL URLWithString:[arrayGallery valueForKey:@"link"][0]] forState:UIControlStateNormal placeholderImage:[UIImage imageNamed:@"blurred-background"] completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {

            [_Image1 setImage:btnImage forState:UIControlStateNormal];//Don't forgot to check for error if error is nil or image is not nil then only set image

            [_ImageLoader1 stopAnimating];
            [_ImageLoader1 removeFromSuperview];
  }];