UIImagePNGRepresentation…writeToFile始终为横向

如何解决UIImagePNGRepresentation…writeToFile始终为横向

|| 每次使用相机拍照时，将其保存后，图像始终处于横向。这意味着我的Xib中的UIImageView是错误的方法。它的肖像-这是我想要和期望的。我可以通过将图像旋转90度来纠正此问题，但即使如此，我也无法禁用显示原始风景照片和动画旋转本身的动画。如何确保保存时来自摄像机的UIImageView实际上处于纵向模式而不是横向模式，以及如何在CGAffineTranformationMakeRotation期间禁用动画？     

解决方法

        我发现这篇文章非常有帮助，它描述了在保存图像之前向UIImage添加类别以进行图像旋转： http://www.platinumball.net/blog/2009/03/30/iphone-uiimage-rotation-and-mirroring/ 然后，在实现类别之后，您将执行以下操作：

- (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];
}