Objectivec 保存 UIImage，以错误的方向加载它

我使用以下代码保存和加载从库中拾取或使用相机拍摄的图像:

//saving an image
- (void)saveImage:(UIImage*)image:(NSString*)imageName {
    NSData *imageData = UIImagePNGRepresentation(image); //convert image into .png format.
    NSFileManager *fileManager = [NSFileManager defaultManager];//create instance of NSFileManager
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); //create an array and store result of our search for the documents directory in it
    NSString *documentsDirectory = [paths objectAtIndex:0]; //create NSString object, that holds our exact path to the documents directory
    NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", imageName]]; //add our image to the path
    [fileManager createFileAtPath:fullPath contents:imageData attributes:nil]; //finally save the path (image)
    NSLog(@"image saved");
}

//loading an image
- (UIImage*)loadImage:(NSString*)imageName {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", imageName]];
    return [UIImage imageWithContentsOfFile:fullPath];
}

这是我如何设置拾取的图像以在我的UIImageView中显示:

imgView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

然而，当我选取图像并将其设置为显示在我的UIImageView中时，这是可以的，但当我加载该图像时，它通常是错误的方向.有什么 idea 吗？有没有人经历过，或者知道我如何解决这个问题？

谢谢

编辑:

所以看起来，如果你加载一张照片，它是一张倒挂在肖像上的照片，它加载在那个方向上，如果你在横向拍摄一张照片，它加载在那个方向上.有什么办法吗？无论加载的方向是什么，它们总是以UIImageOrientationUp返回.