How do i set transparency level for Navigation Bar when using NavigationController?

Discussion in 'iOS Programming' started by thedon1, Sep 22, 2013.

  1. thedon1 macrumors 6502

    Joined:
    Jun 26, 2010
    #1
    Hi guys, i'm using Xcode 5 and am having some trouble that Apple WWDC video hasn't fully cleared up.

    I want a semi transparent status bar. I know if i add a navigation bar, the status bar will take the same translucency and tint. This sounds good.

    I currently have a Navigation Controller which shows the Navigation Bar. My screen (UIViewController) is linked to this.

    I tick translucent in the attributes inspector for the navigation bar in the Navigation Controller.

    My connected ViewController then shows the translucent status and navigation bar as expected.

    When I go back to the Navigation Controller and change the alpha of the navigation bar, this has no impact on the connected View.


    How can I change the level of transparency when using a Navigation Controller?
     
  2. thedon1 thread starter macrumors 6502

    Joined:
    Jun 26, 2010
    #2
    OK i'm answering my own question here, I hope it's useful to others.

    It looks like you can assign a background image to the navigation bar and whatever alpha/ opacity that image has, will be picked up by the status bar.

    Create your image 640x128.

    Use this code
    Code:
     [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"image.png"] forBarMetrics:UIBarMetricsDefault];
    This will make the picture the background of the navigation bar and the status bar.
     

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