每次我使用相机拍照,然后保存时,图像总是横向的。这意味着我的Xib中的UIImageView是错误的。它的肖像——这正是我想要和期望的。我可以通过将图像旋转90度来纠正这一问题,但即使这样,我也不能禁用显示原始横向照片和动画旋转本身的动画。如何确保相机的UIImageView在保存时实际上处于纵向模式,而不是横向模式,以及如何在CGAffineTransformationMakeRotation期间禁用动画??
我发现这篇文章非常有用,它描述了在UIImage中添加一个类别,以便在保存图像之前对其进行旋转:
http://www.platinumball.net/blog/2009/03/30/iphone-uiimage-rotation-and-mirroring/
一旦实现了这个类别,你就会做这样的事情:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *originalImage, *editedImage, *rotatedImage;
editedImage = (UIImage *)[info objectForKey:UIImagePickerControllerEditedImage];
originalImage = (UIImage *)[info objectForKey:UIImagePickerControllerOriginalImage];
if (editedImage)
{
rotatedImage = [editedImage rotate:UIImageOrientationRight];
}
else
{
rotatedImage = [originalImage rotate:UIImageOrientationRight];
}
NSString *f = @"/set/this/to/your/file/name";
[UIImagePNGRepresentation(rotatedImage) writeToFile:f atomically:YES];
[[picker parentViewController] dismissModalViewControllerAnimated:YES];
[picker release];
}