A lightweight tab bar controller geared for maximum customizability. It simply handles the job of switching views and leave everything else for you to customize. Supports using a NIB file to create the main view.

Features:

• Support both nib-based mode and loadView-based mode within a single class.
• Doesn't impose any kinds of graphics on your application. Roll your own graphics and animations and just send a signal using standard IBAction hooks or a single super method call.
• Automatically handles navigation bar property changes when the user switches tab if and when this controller is used inside a UINavigationController
• Also handles child UINavigationController in tabs as well by automatically calling popToRootViewController on multiple taps

Usage:

CocoaPods: pod 'OZTabBarController', '~> 0.2.0'

Nib-based

Use the initWithViewControllers: method or use the designated intializer initWithNibName:bundle:viewControllers: to create a tab view with the specified view controllers and load view form the specified NIB file.

Or just extends the OZTabBarController class directly and add a NIB file with the same name to your project.

The NIB file should have these connections:

• The standard view property for the view controller.
• The childViewContainer property should be connected to a UIView that will be used to place child tab's views.
• userDidTapTabButton action should be connected from a UIControl which should triggers the respective tab displays. Set the tag property to index of the tab you wish to display after clicking the button (or whatever action you have wired for your control.)

Tag offsets

Because tab indexes are zero-based and you might need to use view tags for other purposes, OZTabBarController now supports a tagOffset property. You can override this property to specify the number the controller should subtracts from the view tag to obtain the tab index.

For example, if you have your tab buttons' tags set to 100, 101, 102, .. you can set tagOffset to 100 by placing the following override block on your ViewControler.m file:

- (NSInteger)tagOffset {
      return 100;
}

or simply place self.tagOffset = 100 in your subclass's init method.

loadView-based

If you don't use interface builder and just build your views from loadView just make sure:

• That you call the designated initializer, which is initWithNibName:bundle:viewControllers:
• That you have set the childViewContainer property to a UIView instance to which the child tab view should be put to display.
• That you call either setSelectedTabIndex or setSelectedViewControler to display the tab as needed.

iOS 7 notes

If you are using OZTabBarController inside a UINavigationController and find that the view extends underneath the navigation bar, you can override the following method to prevent this behavior.

- (UIRectEdge)edgesForExtendedLayout {
  return UIRectEdgeNone;
}

Or use the respective setter to set the value as early as possible in your view controller lifecycle.

Refer to this SO question for more information.

License:

BSD2 (See LICENSE file for details)