我在Stackoverflow中查看过很多问题,但没有一个问题解决了我的问题。
所以,我使用Apple的AVCam样本: http://developer.apple.com/library/ios/#samplecode/AVCam/Introduction/Intro.html
因此,当我拍照并将其保存在图像库中时,它很好,但是当我通过裁剪在屏幕上显示它并使用
将其发送到服务器时NSData* pictureData = UIImageJPEGRepresentation(self.snappedPictureView.image, 0.9);
它将它旋转90度!
以下是我裁剪的代码:
UIImage* cropped = [image imageByCroppingRect:CGRectMake(0, 0, (image.size.width * 300)/self.view.frame.size.width, (image.size.height * 300)/self.view.frame.size.height)];
imageByCroppingRect is:
- (UIImage *) imageByCroppingRect:(CGRect)area
{
UIImage *croppedImage;
CGImageRef imageRef = CGImageCreateWithImageInRect([self CGImage], area);
// or use the UIImage wherever you like
croppedImage = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
return croppedImage;
}
答案 0 :(得分:2)
裁剪图像时,您丢失与该图像关联的元数据,告诉它旋转它的正确方法。
相反,您的代码应保留图像的原始旋转,如下所示:
- (UIImage *) imageByCroppingRect:(CGRect)rect {
CGImageRef imageRef = CGImageCreateWithImageInRect([self CGImage], rect);
UIImage *result = [UIImage imageWithCGImage:imageRef scale:self.scale orientation:self.imageOrientation];
CGImageRelease(imageRef);
return result;
}