SDWebImageView图片裁剪

遇到问题 设置了一个宽高 固定的(1:1 )的 图片 用 sdwebimage 加载的时候显示出来的图片会被压缩或者拉伸,想让显示 一部分的图片(保持图片不变形) 所以对图片进行剪裁代码如下

 [cell.imagesd_setImageWithURL:imageUrl placeholderImage:[UIImageimageNamed:@"futrue"] completed:^(UIImage *image,NSError *error, SDImageCacheType cacheType,NSURL *imageURL) {
                CGSize newSize;
                CGImageRef imageRef =nil;
                
                if ((image.size.width / image.size.height) < 1) {
                    newSize.width = image.size.width;
                    newSize.height = image.size.width ;
                    
                    imageRef = CGImageCreateWithImageInRect([imageCGImage], CGRectMake(0,fabs(image.size.height - newSize.height) / 2, newSize.width, newSize.height));
                    
                } else {
                    newSize.height = image.size.height;
                    newSize.width = image.size.height *1;
                    
                    imageRef = CGImageCreateWithImageInRect([imageCGImage], CGRectMake(fabs(image.size.width - newSize.width) / 2, 0, newSize.width, newSize.height));
                    
                }

                
                
                cell.image.image =[UIImageimageWithCGImage:imageRef];
                
           }];

后来发现对 iimageView 做入下处理 就可实现

      showSpecialityCatoryImage.contentMode =UIViewContentModeScaleAspectFill;
      showSpecialityCatoryImage.clipsToBounds = YES