UIImage 剪裁的方法
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
