Navigation bar in iOS 6 look like bar in iOS 7

问题

Is there any way to make navigation bar elements (back button) in iOS 6 look like navigation bar elements in iOS 7 ? And also buttons and other iOS 7 elements of UI.

回答1:

Instead of putting code into every view controller that you need to customize, I would recommend doing this for the entire application by putting something like this in your application:didFinishLaunchingWithOptions: method in the App Delegate

// Nav bar
[[UINavigationBar appearance] setBackgroundImage:[[UIImage imageNamed:@"navBar.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(10, 5, 10, 5)] forBarMetrics:UIBarMetricsDefault];

// Back buttons
[[UIBarButtonItem appearance] setBackButtonBackgroundImage:[UIImage imageNamed:@"backNavButton.png"] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

// Toolbar
[[UIToolbar appearance] setBackgroundImage:[[UIImage imageNamed:@"toolbar.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(10, 5, 10, 5)] forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsDefault];

回答2:

You can customize the navigation bar by setting the background Image like this

[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"topbar.png"] forBarMetrics:UIBarMetricsDefault];

And you can add a customize bar with setLeftBarButtonItems method like this.

[self.navigationItem setLeftBarButtonItems:];

来源：https://stackoverflow.com/questions/19179528/navigation-bar-in-ios-6-look-like-bar-in-ios-7