Скачать или смотреть Navigating from a Bar Button to a Navigation Controller in iOS: Show the Navigation Bar

Discover how to properly navigate from a Bar Button item to a Navigation Controller in iOS using Swift. Ensure the navigation bar is displayed with our simple solution.
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This video is based on the question https://stackoverflow.com/q/66085765/ asked by the user 'Jacob' ( https://stackoverflow.com/u/14959930/ ) and on the answer https://stackoverflow.com/a/66086226/ provided by the user 'D. Mika' ( https://stackoverflow.com/u/7472819/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Navigating from a Bar Button to Navigation Controller in iOS: Show the Navigation Bar

When developing an iOS application, you might encounter scenarios where you need to navigate from one view controller to another using a Bar Button item. A common problem arises when you transition to a new navigation controller and find that the navigation bar is unexpectedly hidden. In this post, we will address this issue and show you an effective solution to ensure your navigation bar is visible when presenting a new view controller.

The Problem

You have set up a Bar Button item that, when tapped, is supposed to navigate to a new view controller embedded within a navigation controller. However, instead of seeing the navigation bar, it disappears upon the transition. This can be frustrating and may lead to a poor user experience since the navigation controls are essential for seamless app navigation.

The original code snippet provided for navigating looked like this:

[[See Video to Reveal this Text or Code Snippet]]

While this code changes the root view controller, it does not properly present your navigation controller, resulting in a missing navigation bar.

The Solution: Presenting the View Controller Correctly

Instead of modifying the window.rootViewController, you should utilize the present method to display your view controller properly. This will maintain the navigation bar and show it as expected.

Step-by-Step Code Adjustment

Present the View Controller:
Update your navigation code to use the present method as follows:

[[See Video to Reveal this Text or Code Snippet]]

Check the Identifier:
Ensure that AdPostViewController is indeed the identifier for your navigation controller in your storyboard. This step is crucial to avoid misnavigation or runtime errors.

Understanding the Changes

Why Use Present?: By presenting the view controller, you keep the current hierarchy intact, which allows the navigation bar to be displayed correctly. Changing window.rootViewController removes the current context, leading to issues like the hidden navigation bar.

Modal Transition Style: The modalTransitionStyle provides a smooth transition effect (like a cross-dissolve), which enhances the user experience during navigation.

Conclusion

Navigating from a Bar Button item to a Navigation Controller in iOS doesn't have to cause issues with the navigation bar disappearing. By properly using the present method, you can maintain the navigation context and display your navigation controls seamlessly. Always check your storyboard identifiers and remember to choose the right presentation method to enhance your app’s usability.

Implement these tips in your iOS development projects to improve navigation and maintain a user-friendly interface. Happy coding!