Using Navigation Controllers

Push/pop navigation is one of the common types of navigation in iPhone apps, and it is easy to set up. A navigation controller manages a stack of view controllers. It is always initialized with a view controller and view controllers can be pushed onto the stack or removed from the stack.

Follow the steps below to set up a navigation controller using both Storyboard and programatically.

Using Navigation Controllers in Storyboard

Step 1: Embed a View Controller in a Navigation Controller

What changes? Notice there is another View Controller added, including another scene. There is also a gray arrow that indicates that the Nav controller is now the main entry point, or Initial View Controller. A link is also established between the Nav and the original View Controller.

Step 2: Create push segues to any view controller

First make sure you have two View Controllers. Control-Drag from the source View Controller to the Destination View Controller. Choosing show will implement a standard segue (Pronounced seg-way). Read more about Showing View Controller from the Apple Developer documentation.

Step 3: Popping a View Controller

By default, navigation controllers provide a navigation bar with a back button. If you want to go back to the previous view controller using code, then you can call the popViewController method, as shown below.

//In Swift
navigationController!.popViewController(animated: true)

//In Objective-C
[self.navigationController popViewControllerAnimated:YES];

more

UIView.animate(withDuration: 0.3, animations: { 
    // Animate view properties here...
    }) { (Bool) in
        // Code to run after animation has finished...
}

[UIView animateWithDuration:0.4
     animations:^{
       //your animation here
      }
     completion:^(BOOL finished){ 
       NSLog(@"Animation finished"); 
 }];