0

I have a tab bar application with several controllers. Some are UINavigationControllers, some just simple UIViewControllers. The central button presents the UIImagePickerController to allow the user to take a picture. When I present the Image Picker from a simple UIViewControllers, it works fine. But when I present it while a UINavigationController is currently the selectedViewController, the dismall of the picker removes the UINavigationBar of the controller.

I read that with UINavigationControllers, the modal view must be presented from the navigationController, but it does not work either. Here are bunches of code :

    UIImagePickerController* picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    if (TARGET_IPHONE_SIMULATOR)
    {
        picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    }
    else
    {
        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
        {
            picker.sourceType = UIImagePickerControllerSourceTypeCamera;
        }
        else
        {
            UIAlertView* alert = [[UIAlertView alloc]
                                  initWithTitle:@"Erreur"
                                  message:@"Pour pouvoir poster des photos, votre device doit posséder un appareil photo"
                                  delegate:self
                                  cancelButtonTitle:@"OK"
                                  otherButtonTitles:nil];
            [alert show];
            return;
        }
    }
    if ([self.selectedViewController respondsToSelector:@selector(presentViewController:animated:completion:)])
    {
        [self.selectedViewController presentViewController:picker animated:YES completion:nil];
    }
    else
    {
        [self.selectedViewController presentModalViewController:picker animated:YES];
    }

the dismall :

[self.selectedViewController dismissModalViewControllerAnimated:YES];

Has anyone got this strange behavior (guess it has something to do with the fact that UIImagePickerController delegate must implement UINavigationControllerDelegate) and know how to resolve that? Thanks.

4

2 回答 2

1

You can redirect to pickerController using this

[self presentViewController:picker animated:YES completion:^{}];

And its delegate method

-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info
{
    NSData *dataImage = UIImageJPEGRepresentation([info objectForKey:@"UIImagePickerControllerOriginalImage"],1);
    [picker dismissViewControllerAnimated:YES completion:^{}];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [picker dismissViewControllerAnimated:YES completion:nil];
}

Or

Make sure that you are not setting any setHidden in your Code.

于 2012-11-27T16:24:43.947 回答
1

It was actually really more simple : in the viewWillAppear, I set the hidden property to NO and in the viewWillDisappear I set it to YES. The thing is : when the modal controller is presented, the viewWillDisappear was called. But when it was dismissed, the viewWillAppear was not called... Not really the expected behavior, but still. Thanks guys.

于 2012-11-30T13:54:16.423 回答