从 UITabBarController 中关闭 UIImagePickerController

Question

我有一个标签栏应用程序，其中一个标签使用导航控制器在一系列视图中移动。在最终视图上，有一个添加照片的按钮，它呈现了一个 UIImagePickerController。到目前为止，一切都很好 - 但是当我完成选择图像或取消操作时，会加载上一个视图，但没有标签栏。我确定我缺少一些基本的东西，但是任何关于如何正确释放 UIImagePickerController 的建议都将不胜感激。代码如下：

ImagePickerViewController *aController = [[ImagePickerViewController alloc];             initWithNibName:@"ImagePickerViewController" bundle:[NSBundle mainBundle]];  
[self presentModalViewController:aController animated:YES];  
[aController release];  

//viewDidLoad
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.delegate = self;

if([UIImagePickerController isSourceTypeAvailable:  UIImagePickerControllerSourceTypeCamera]){
      imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
 } else {
      imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;  
 }

 [window addSubview:imagePickerController.view];

//ImagePickerViewController imagePickerControllerDidCancel - FinalViewController is the last view in the stack controlled by a navigation controller which contains the button to present the UIImagePickerController

[picker dismissModalViewControllerAnimated:YES];
FinalViewController *aController = [[FinalViewController alloc initWithNibName:@"FinalViewController" bundle:[NSBundle mainBundle]];
[picker presentModalViewController:aController animated:YES];
[aController release];

Answer 1

您不需要将选取器视图添加为窗口的子视图。 当用户按下按钮时，执行类似于以下 snapPicture 方法的操作：

- (IBAction) snapPicture{


            UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
            // Set up the source 
            if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
                ipc.sourceType = UIImagePickerControllerSourceTypeCamera; 
                ipc.allowsEditing = NO;
            }
            else {
                    ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;  
                 }

            ipc.delegate = self;
            [self presentModalViewController:ipc animated:YES]; 
            [ipc release];


}

然后，实现选择器委托方法。这里我只是展示其中一个来展示如何关闭选择器。

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)imagePicker 
{ 

    [[imagePicker parentViewController] dismissModalViewControllerAnimated:YES]; 

}