CODEWITHSUNDEEP
iosobjective-cuiviewuinavigationcontrolleruinavigationbar
Maheswaran Ravisankar
Maheswaran Ravisankar

Reputation: 17920

Navigation Bar move up while pop animation of Navigation Controller

In my root view, I create a navigation controller and add it 20 px below the status bar.

My Navigation View controller

The status bar appears normal.

enter image description here

When I click Back, (Freezed Animation for screenshot).

The view moves up when the animation is happening. And After it completes, the status bar appears back.

enter image description here

Code: This is how I add the navigation controller to my VC

In RootView: 

navController = [[UINavigationController alloc]initWithRootViewController:myView];

navController.navigationBar.translucent = YES;
navController.view.autoresizingMask = UIViewAutoresizingNone;

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
    CGRect frame=navController.view.frame;

    frame.origin.y += 20;
    frame.size.height-=20;
    navController.view.frame=frame;
}

Upvotes: 0

Views: 1742

Answers (2)

Maheswaran Ravisankar
Maheswaran Ravisankar

Reputation: 17920

This answer helped me a lot.

Push / Pop View Controller With Navigation Bar from View Controller Without Navigation Bar

I add my navigation controller with first VC, and it wants the navigation bar hidden

I had it as animated:NO in below snippet.. The correct usage has to be using the animation boolean from the delegate itself.

In VC1: The Navigation Bar should be hidden

I have to hide the navigation bar like below.

-(void)viewWillAppear:(BOOL)animated {
    // Hide the bar with animation how viewWillAppear is called
    [self.navigationController setNavigationBarHidden:YES animated:animated];
}

When I push VC2 to VC1, I need to enable the navigation bar back. So in VC1 itself, during the disappear iI do the below.

-(void)viewWillDisappear:(BOOL)animated{
    // Show the bar with animation how viewWillDisappear is called
    [self.navigationController setNavigationBarHidden:NO animated:animated];
}

In VC2: The Navigation Bar should be shown

When I press back in VC2, I actually have to hide the navigation bar again. So, I do it in viewWillDisappear.

-(void)viewWillDisappear:(BOOL)animated{
    // Hide the bar with animation how viewWillAppear is called
    [self.navigationController setNavigationBarHidden:YES animated:animated];
}

The Main key is animated:animated and not animated:NO .. Unbelievable.!

Upvotes: 1

J. Lopes
J. Lopes

Reputation: 1345

So I believe this is your problem

frame.origin.y += 20;
frame.size.height-=20;
navController.view.frame=frame;

It has been called every time your view load. I believe if you go forward and backward many times the view is going up on your window. is it? If yes. Make sure that will be called just once.

I hope this helps you.

Upvotes: 1

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