导航栏的颜色不会变回吗？ IOS 7

Question

I have several tableviews with navigation controller. The navigation bar is white for all the views except the last one, which is red. I have

[[[self navigationController] navigationBar] setTintColor:[UIColor redColor];

in the viewDidLoad of the last tableview and

[[[self navigationController] navigationBar] setTintColor:[UIColor whiteColor];

in the viewDidLoad of other table views.

It works fine until I get to the last view and the color of the navigation bar changes to red. When I go back to the previous views, all the previous views' navigation bar has changed to red. Where should I put those codes so the color will remain unchanged?

Thanks,

Answer 1

Put that in viewWillAppear: . Code in this method will be run every time the view reappear.

Answer 2

Use viewDidLoad for initialization purposes only as it is called one time. Adding your code in viewWillAppear method should fix your problem as it gets called every time the view appears.

However, I like using the UIAppearance to customize the appearance of all instances of a class by creating another method -

-(void) setupAppearance {

    UINavigationBar *navigationBarAppearance = [UINavigationBar appearance];

    navigationBarAppearance.barTintColor = [UIColor redColor];

    // Another method 
    // [UINavigationBar appearance].barTintColor = [UIColor redColor];
}