将 UIImage 从 UIImagePickerController 添加到 UIButton

Question

我有一个 UIButton，用户单击它可以调出 UIImagePickerController。处理完毕后，它会将编辑后的 ​​UIImage 返回给委托处理程序，然后委托处理程序将用新图像填充 UIButton。

然而，在实践中，如果用户从他们的库中选择图像，它就可以正常工作。但是，如果他们使用相机拍照并对其进行编辑，则该图像不会到达 UIButton。但是，如果我将相同的图像放入 UIImageView 中进行测试，它就会显示出来。

此外，这在模拟器中工作正常，但在设备上不起作用。这是某种内存问题吗？这是我的代码：

- (IBAction)takePictureButtonTapped
{
    UIActionSheet *popupQuery = [[UIActionSheet alloc]
                                 initWithTitle:nil
                                 delegate:self
                                 cancelButtonTitle:@"Cancel"
                                 destructiveButtonTitle:nil
                                 otherButtonTitles:@"Take a Photo", @"Upload from Library", nil];

    popupQuery.actionSheetStyle = UIActionSheetStyleBlackOpaque;
    [popupQuery showInView:self.view];
    [popupQuery release];

}

- (void)actionSheet:(UIActionSheet *)actionSheet
clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSLog(@"actionSheet:clickedButtonAtIndex:%d", buttonIndex);
    if(buttonIndex == 2)
    {
        // cancel
        [imagePickerController release];
    }
    else
    {
        imagePickerController = [[[UIImagePickerController alloc] init] autorelease];
        imagePickerController.delegate = self;
        imagePickerController.allowsEditing = YES;

        if (buttonIndex == 0)
        {
            // Take a photo
            // Set up the image picker controller and add it to the view
            imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
        }
        else if (buttonIndex == 1)
        {
            // Upload from Library
            imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

            if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary] == NO)
                imagePickerController.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
        }


        [self presentModalViewController:imagePickerController animated:YES];
    }
}

- (void)imagePickerController:(UIImagePickerController *)picker
        didFinishPickingImage:(UIImage *)img
                  editingInfo:(NSDictionary *)editInfo
{
    NSLog(@"imagePickerController::didFinishPickingImage:%@", img);
    itemImage = img;
    [itemImage retain];
    [imageButton setBackgroundImage:itemImage forState:UIControlStateNormal];
    [[picker parentViewController] dismissModalViewControllerAnimated:YES];
}

我已经尝试过 setImage、setBackgroundImage 对于所有状态，但它们都不起作用。然而，如果我将相同的图像放入 UIImageView 中，那就没问题了。

有什么想法吗？

Answer 1

我发现它无法正常工作的原因是因为我使用的是已弃用的 didFinishPickingImage:editingInfo: 。我应该使用 imagePickerController:didFinishPickingMediaWithInfo: 来代替。现在一切正常！

由于某种原因，XCode 没有警告我该弃用。