iOS 获取网络图片的大小

最新推荐文章于 2019-03-26 15:55:03 发布

shengdaVolleyball

最新推荐文章于 2019-03-26 15:55:03 发布

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分类专栏： ImageView 文章标签： ios 网络 url 图片

本文链接：https://blog.youkuaiyun.com/shengdaVolleyball/article/details/51919918

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- (CGSize)getImageSizeWithURL:(NSURL *)url
{
    CGImageSourceRef image = CGImageSourceCreateWithURL((CFURLRef)url, NULL);
    CGFloat width = 0.0f, height = 0.0f;

    if (image){
        CFDictionaryRef imageAcc = CGImageSourceCopyPropertiesAtIndex(image, 0, NULL);

        if (imageAcc != NULL){

            CFNumberRef widthNumber  = CFDictionaryGetValue(imageAcc, kCGImagePropertyPixelWidth);

            if (widthNumber != NULL) {

                CFNumberGetValue(widthNumber, kCFNumberFloatType, &width);
            }
            CFNumberRef heightNumber = CFDictionaryGetValue(imageAcc, kCGImagePropertyPixelHeight);

            if (heightNumber != NULL) {

                CFNumberGetValue(heightNumber, kCFNumberFloatType, &height);
            }
            CFRelease(imageAcc);
        }
        CFRelease(image);
        NSLog(@"Image dimensions: %.0f x %.0f px", width, height);
    }

    return CGSizeMake(width, height);
}