我正在开发一个裁剪图像的应用程序。我正在使用以下代码来调用裁剪方法:
UIImage* croppedImage = [self imageCrop:imageView toRect:CGRectMake(10.0, 50.0, 320, 100)];
这是该方法的代码:
{
//create a context to do our clipping in
CGRect newRect = CGRectApplyAffineTransform(rect, imageViewToCrop.transform);
UIImage *imageToCrop = imageViewToCrop.image;
UIGraphicsBeginImageContext(newRect.size);
CGContextRef currentContext = UIGraphicsGetCurrentContext();
//create a rect with the size we want to crop the image to
//the X and Y here are zero so we start at the beginning of our
//newly created context
CGRect clippedRect = CGRectMake(0, 0, rect.size.width, rect.size.height);
CGContextClipToRect( currentContext, clippedRect);
//draw the image to our clipped context using our offset rect
CGContextDrawImage(currentContext, newRect, imageToCrop.CGImage);
//pull the image from our cropped context
UIImage *cropped = UIGraphicsGetImageFromCurrentImageContext();
//pop the context to get back to the default
UIGraphicsEndImageContext();
return cropped;
}
问题是当我将此图像设置为 UIImageView 时,我发现返回的图像向左旋转。我不能让它旋转起来。任何人都可以知道这个问题吗?