UIImagePickerController和keypress

Question

我已经创建了一个UIImagePickerController的简单子类，如下所示：

@interface CustomImagePicker : UIImagePickerController <UITextViewDelegate> {
}

-(void) viewDidAppear:(BOOL)animated{
    // make sure to call the same method on the super class!!!
    //
    [super viewDidAppear:animated];

    UITextView *textView = [[[UITextView alloc] init] autorelease];
    [self.view addSubview:textView];

    [textView becomeFirstResponder];
    [textView setDelegate:self];
    [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(keyPressed:) name: UITextViewTextDidChangeNotification object: nil];

}

- (void)textViewDidChange:(UITextView *)textView{
    NSLog(@"Picture Taken 2");

    [self takePicture];
}

-(void) keyPressed: (NSNotification*) notification
{
    NSLog(@"Picture Taken 1");
    [self takePicture];
}

在我的主窗口中，我以模态方式打开它：

   camera = [[CustomImagePicker alloc] init]; 
            camera.delegate = self; 
            camera.sourceType = UIImagePickerControllerSourceTypeCamera; 
            camera.allowsEditing = NO; 
            camera.showsCameraControls = NO;
            camera.wantsFullScreenLayout = NO;
            //camera.cameraOverlayView  = myView;

            [self presentModalViewController:camera animated:YES]; 

按键或textviewDidChange都没有被调用。

任何人都有这方面的经验吗？

提前致谢！

Answer 1

我认为你不能继承UIImagePickerController的子类。

以下文件 - http://developer.apple.com/library/ios/#documentation/uikit/reference/UIImagePickerController_Class/UIImagePickerController/UIImagePickerController.html 指定 “重要：UIImagePickerController类仅支持纵向模式。此类旨在按原样使用，不支持子类化。”

Answer 2

我相信它应该有用。需要一些详细信息。

换句话说，尝试使用UITextViewDelegate

UITextView *textView = [[[UITextView alloc] init] autorelease];
[self.view addSubview:textView];

[textView becomeFirstResponder];
[textView setDelegate:self];

并实施;你班上的- (void)textViewDidChange:(UITextView *)textView;方法。

供参考：http://developer.apple.com/library/ios/#documentation/uikit/reference/UITextViewDelegate_Protocol/Reference/UITextViewDelegate.html