导入 

#import 
    
     @interface UIImage (ImgSize)/** *  根据图片url获取网络图片尺寸 */+ (CGSize)getImageSizeWithURL:(id)URL;@end
    

#import "UIImage+ImgSize.h"#import 
    
     @implementation UIImage (ImgSize)+ (CGSize)getImageSizeWithURL:(id)URL{    NSURL * url = nil;    if ([URL isKindOfClass:[NSURL class]]) {        url = URL;    }    if ([URL isKindOfClass:[NSString class]]) {        url = [NSURL URLWithString:URL];    }    if (!URL) {        return CGSizeZero;    }    CGImageSourceRef imageSourceRef = CGImageSourceCreateWithURL((CFURLRef)url, NULL);    CGFloat width = 0, height = 0;    if (imageSourceRef) {        CFDictionaryRef imageProperties = CGImageSourceCopyPropertiesAtIndex(imageSourceRef, 0, NULL);        // 以下是对手机32位、64位的处理（由网友评论区拿到的：小怪兽饲养猿）        if (imageProperties != NULL) {            CFNumberRef widthNumberRef = CFDictionaryGetValue(imageProperties, kCGImagePropertyPixelWidth);#if defined(__LP64__) && __LP64__            if (widthNumberRef != NULL) {                CFNumberGetValue(widthNumberRef, kCFNumberFloat64Type, &width);            }            CFNumberRef heightNumberRef = CFDictionaryGetValue(imageProperties, kCGImagePropertyPixelHeight);            if (heightNumberRef != NULL) {                CFNumberGetValue(heightNumberRef, kCFNumberFloat64Type, &height);            }#else            if (widthNumberRef != NULL) {                CFNumberGetValue(widthNumberRef, kCFNumberFloat32Type, &width);            }            CFNumberRef heightNumberRef = CFDictionaryGetValue(imageProperties, kCGImagePropertyPixelHeight);            if (heightNumberRef != NULL) {                CFNumberGetValue(heightNumberRef, kCFNumberFloat32Type, &height);            }#endif            CFRelease(imageProperties);        }                CFRelease(imageSourceRef);    }    return CGSizeMake(width, height);}@end