ios7导航栏高度突然改变

Question

hi i want to solution in ios7's problem.

My classes is

AlphaViewController : UIViewController,
BetaViewController : UIViewController

when AlphaViewController will appear, Alpha's navigation bar hight is 44.0f . looks like too. and Supported Orientation is Portrait.

then I use presentmodalViewController for BetaViewController . BetaViewController 's navigation bar will be hide in viewWillAppear . and Supported Orientation is LandScape.

then I use popViewController function. so AlphaViewController will be appear again. I use self.navigationController.navigationBarHidden = YES;

But suddenly Alpha's navigation bar hight is changed. It looks like 22.0f . I don't know reason..

my english is not good. thanks to read.

Answer 1

first of all presentModalViewController: is deprecated since ios6 so you may not use it for presenting an view controller.

When you present a viewController from an navigationController if you want the navigation bar to be present on AlphaViewController you dont need to hide or un hide. Since you are presenting the BetaViewController navigation bar will not appear and when you dismiss it will be visible again in AlphaViewController .