iphone - 从 UITabBarController 中消除 UIImagePickerController

Question

我有一个选项卡栏应用程序，其中一个选项卡使用导航 Controller 在一系列 View 中移动。在最终 View 上，有一个添加照片的按钮，其中呈现了一个 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 View ，但没有选项卡栏。我确信我错过了一些基本的东西，但是任何有关如何正确释放 UIImagePickerController 的建议将不胜感激。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 View 添加为窗口的 subview 。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(delegate)方法。在这里我只是展示其中之一来展示如何关闭选择器。

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

    [[imagePicker parentViewController] dismissModalViewControllerAnimated:YES]; 

}