iPhone SDK - 如何在UINavigationController中顯示用相機拍攝的照片？

Question

這是我到目前爲止的代碼：

/* class: myViewController 
@interface myViewController: UIViewController 
     <UIImagePickerControllerDelegate, UINavigationControllerDelegate> 
*/ 
- (IBAction) getPicture { 
    UIImagePickerController * picker = [[UIImagePickerController alloc] init]; 
     picker.delegate = self; 
     picker.sourceType = UIImagePickerControllerSourceTypeCamera; 
     [self presentModalViewController:picker animated:YES]; 
} 

- (void) imagePickerController:(UIImagePickerController *)thePicker 
        didFinishPickingMediaWithInfo:(NSDictionary *)imageInfo 
{ 
    [[thePicker parentViewController] dismissModalViewControllerAnimated:YES]; 
     UIImage *img = [imageInfo 
          objectForKey:@"UIImagePickerControllerOriginalImage"]; 
    self.myImageView.image = img; 
} 

所以基本上我想從iPhone的相機拍照，並在一個UIImageView顯示。只要類myViewController作爲獨立視圖顯示，此功能就可以很好地工作。如果我將視圖放在UINavigationController中，UIImageView在用相機拍攝後不會顯示圖像。但是如果我從圖書館中選擇一張照片，一切都很好。

那麼，爲什麼UIImageView不會在UINavigationController中顯示用相機拍攝的圖像呢？

Answer 1

嘗試以下行切換：

[thePicker dismissModalViewControllerAnimated:YES]; 
UIImage *img = [imageInfo objectForKey:@"UIImagePickerControllerOriginalImage"]; 
self.myImageView.image = img; 

以下幾點：

UIImage *img = [imageInfo objectForKey:@"UIImagePickerControllerOriginalImage"]; 
self.myImageView.image = img; 
[thePicker dismissModalViewControllerAnimated:YES]; 

也許圖像被釋放，因爲該視圖的解聘的你

self.myImageView.image = img; 

保留之前

Answer 2

對我來說，你會忽略錯誤的視圖控制器。切忌：

[thePicker dismissModalViewControllerAnimated:YES]; 

讀：

[self dismissModalViewControllerAnimated:YES];