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Presenting a Modal View Controller hides the Navigation Bar

Asked 2011-08-11T23:14:02.903
17

I have a navigation based app with a navigation bar, but there are a few instances where instead of pushing a view controller onto the stack, I need to present the view controller modally. The problem is that when I dismiss the modal view controller, everything functions as expected except that the navigation bar is hidden and the (parent view) has been resized, which is the expected behavior according to the docs. So I figured I could simply call a built-in method to unhide the navigation bar. I have already tried

[self.navigationController setNavigationBarHidden:NO];

as well as the animated version without success.

The documentation talks about this in the method

presentModalViewController: animated:

in the discussion section where it says,

On iPhone and iPod touch devices, the view of modalViewController is always presented full screen" and "Sets the modalViewController property to the specified view controller. Resizes its view and attaches it to the view hierarchy."However, the docs didn't clue me in as to how to undo this process after dismissing a modal view.

Has anyone else experienced this and found a solution?

Edit: I am having this same problem, so instead of asking my own question I am sponsoring a bounty on this one. This is my specific situation:

In my case, I am presenting an Image Picker in a Modal View Controller, over a Navigation Controller:

-(void) chooseImage {
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
        imagepicker = [[UIImagePickerController alloc] init];
        imagepicker.allowsEditing = NO;
        imagepicker.delegate = self;
        imagepicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        imagepicker.navigationBar.opaque = true;
        imagepicker.wantsFullScreenLayout = NO;
objective-c ios cocoa-touch uinavigationbar modalviewcontroller
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2 Answers

11

Simply try following code it will work

SettingsViewController *settings    =   [[SettingsViewController alloc] init];
UINavigationController *navcont = [[UINavigationController alloc] initWithRootViewController:settings];
[self presentModalViewController:navcont animated:YES];
[settings release];
[navcont release];

One need to present the navigation controller in order to have navigation bar on the presented controller

answered 2012-10-16T08:51:26.903
1

Check this out. This is Apple's Documentation under UIViewController Class Reference:

It clearly mentions that modal view always presents in full screen mode, so it is obvious that navigation bar will be hidden. So put the seperate navigation bar on modal view to navigate back.

presentModalViewController:animated:
Presents a modal view managed by the given view controller to the user.

- (void)presentModalViewController:(UIViewController *)modalViewController animated:(BOOL)animated
Parameters
modalViewController
The view controller that manages the modal view.
animated
If YES, animates the view as it’s presented; otherwise, does not.
Discussion
On iPhone and iPod touch devices, the view of modalViewController is always presented full screen. On iPad, the presentation depends on the value in the modalPresentationStyle property.

Sets the modalViewController property to the specified view controller. Resizes its view and attaches it to the view hierarchy. The view is animated according to the transition style specified in the modalTransitionStyle property of the controller in the modalViewController parameter.

Availability
Available in iOS 2.0 and later.

Hope this helps you understand that hiding the whole view along with navigation controller is default behaviour for modal view so try putting a seperate navigation bar in modal view to navigate.

You can check it further on this link

http://developer.apple.com/library/ios/#documentation/uikit/reference/UIViewController_Class/Reference/Reference.html

answered 2011-08-12T05:26:53.807

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