退出自定义模式视图控制器

Question

I am loading a UIImagePickerController in this way:

- (void) launchCamera {

// Set up the camera
CustomCamera *cameraController = [[CustomCamera alloc] init];
cameraController.sourceType = UIImagePickerControllerSourceTypeCamera;
cameraController.delegate = self;

cameraController.showsCameraControls = NO;
cameraController.navigationBarHidden = YES;
cameraController.toolbarHidden = YES;

// overlay on top of camera lens view
UIImageView *cameraOverlayView = [[UIImageView alloc] initWithImage:[UIImage   imageNamed:@"camera_overlay.png"]];
cameraOverlayView.alpha = 0.0f;
cameraController.cameraOverlayView = cameraOverlayView;

// animate the fade in after the shutter opens
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDelay:2.2f];
cameraOverlayView.alpha = 1.0f;
[UIView commitAnimations];

[customCamera presentModalViewController:cameraController animated:YES];
}

The problem is that I don't know how to dismiss it. When I try

 [cameraController dismissViewControllerAnimated:YES completion: nil];

The cameracontroller still is not removed from the screen

Answer 1

To present a view controller modally, you should use this method:

 - (void)presentViewController:(UIViewController *)viewControllerToPresent animated:(BOOL)flag completion:(void (^)(void))completion NS_AVAILABLE_IOS(5_0);

To dismiss a modal view controller, you should use this method:

- (void)dismissViewControllerAnimated:(BOOL)flag completion:(void (^)(void))completion NS_AVAILABLE_IOS(5_0);

Per the inline comment above these methods ( UIViewController.h ):

The next two methods are replacements for presentModalViewController:animated and dismissModalViewControllerAnimated: The completion handler, if provided, will be invoked after the presented controllers viewDidAppear: callback is invoked.

Here's what's wrong with your code:

You're using the deprecated method to present your modal view controller and trying to dismiss it with the new method... this won't work.

Answer 2

change this

[customCamera presentModalViewController:cameraController animated:YES];

with this

[self presentViewController:cameraController animated:YES completion:nil];

and dismiss code type this

[self dismissViewControllerAnimated:YES  completion:nil];

Answer 3

I hope this will help you

[self dismissViewControllerAnimated:YES  completion:nil];

happy coding...

Answer 4

If you are adding ViewController as modal - use:

 [self dismissModalViewControllerAnimated:YES];

inside your view controller.

Please be aware of fact the both functions with "Modal" in name were deprecated in iOS 6.0. Use presentViewController:animated:completion: instead.