ZWZNavigationControllerDemo

Custom UINavigationController subclass which allows animated transitions on navigation bar background color.

Usage

Storyboard

If you've set up a Navigation Controller in your Storyboard, you'll need to specify ZWZNavigationBar as the custom class for the Navigation Bar in your Navigation Controller scene.

Programmatically

If you're initializing your Navigation Controller programmatically, you'll need to use the initWithNavigationBarClass:toolbarClass: initializer, passing [ZWZNavigationBar class] for the *navigationBarClass* parameter.

You'll need to import ZWZNavigationController.h when you want to change navigation bar background color, as described below.

Configuration

The best place to set navigation bar background color for a view controller is the view controller's 'viewDidLoad:' method

- (void)viewDidLoad {
    [super viewDidLoad];
    [(ZWZNavigationController *)self.navigationController setNavigationBarBackgroudColor:[UIColor colorWithRed:arc4random_uniform(255)/255.0
                                                                                                         green:arc4random_uniform(255)/255.0
                                                                                                          blue:arc4random_uniform(255)/255.0
                                                                                                         alpha:1]
                                                                       forViewController:self];
}

If you want to change the navigation bar background color after view did appeared, use the 'setBarBackgroundColor:animationDuration:options:usingSpring:'

Animated:

    ZWZNavigationController *nvc = (ZWZNavigationController *)self.navigationController;
    [nvc.zwzNavigationBar setBarBackgroundColor:color
                              animationDuration:0.35
                                        options:UIViewAnimationOptionCurveEaseInOut
                                    usingSpring:NO];

Not Animated:

    ZWZNavigationController *nvc = (ZWZNavigationController *)self.navigationController;
    [nvc.zwzNavigationBar setBarBackgroundColor:color
                              animationDuration:0
                                        options:0
                                    usingSpring:NO];

About

WenZheng Zhang

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