将图片居中裁剪成标准正方形

/*以原图最短边为边长&＃xff0c;居中裁剪 image 为正方形*/
&＃43; (UIImage *)centerClipImage:(UIImage *)image;

/*以原图最短边为边长&＃xff0c;居中裁剪 image 为正方形*/
&＃43; (UIImage *)centerClipImage:(UIImage *)image
{if (!image) {return nil;}UIImage *srcImage &＃61; image;CGFloat val &＃61; 0.f;CGRect rect &＃61; CGRectZero;CGSize srcSize &＃61; srcImage.size;if ([&＃64;(srcSize.width) compare:&＃64;(srcSize.height)] &＃61;&＃61; NSOrderedAscending) { // w hval &＃61; srcSize.height;rect &＃61; CGRectMake((srcSize.width - val) / 2.f, 0.f, val, val);}else { // w &＃61; hreturn image;}CGImageRef cg &＃61; CGImageCreateWithImageInRect(srcImage.CGImage, rect);UIImage *clippedImage &＃61; [UIImage imageWithCGImage:cg];CGImageRelease(cg);return clippedImage;
}