本文介绍了一个UIImage的扩展方法，该方法允许开发者轻松地裁剪UIImage到指定的CGRect边界。此功能无视图片的方向设置，适用于iOS应用开发。
在UIImage上扩展一个函数
@interface UIImage (Resize)
- (UIImage *)croppedImage:(CGRect)bounds;
@end
@implementation UIImage (Resize)
// Returns a copy of this image that is cropped to the given bounds.
// The bounds will be adjusted using CGRectIntegral.
// This method ignores the image's imageOrientation setting.
- (UIImage *)croppedImage:(CGRect)bounds {
CGImageRef imageRef = CGImageCreateWithImageInRect([self CGImage], bounds);
UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
return croppedImage;
}
@end
转载于:https://www.cnblogs.com/liuxingzi/archive/2013/04/10/3404337.html
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