Скачать или смотреть Fixing iOS Swift Firebase User Login Checks for iOS 12 Devices

Discover how to ensure users do not have to log in every time in your iOS application using Firebase authentication, especially for iOS 12.
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Ensuring Seamless User Experience with Firebase Authentication in iOS 12

When developing an app using Firebase for user authentication, one common hurdle developers face is managing user sessions across different iOS versions. If your app runs perfectly on iOS 13 but forces users to log in every time on iOS 12 devices, you might be encountering a problem with how the app loads the user session. In this guide, we will address the issue and provide a solution to ensure a smooth user experience across all supported iOS versions.

Understanding the Issue

The primary issue arises due to the introduction of the SceneDelegate class in iOS 13, which changes how applications manage their user interfaces. While SceneDelegate is designed to handle UX for iOS 13 and later, using it on devices running iOS 12 or below can lead to problems where users aren't recognized once they have logged in. This results in a frustrating experience, where users have to re-enter their credentials every time they open the app.

The Solution: Moving Logic to AppDelegate

To solve this problem, it is essential to make sure the login-checking logic is incorporated into the AppDelegate for iOS 12 and earlier. You will implement the same functionality that you wrote in the SceneDelegate but without relying on the newer APIs.

Here's how to effectively manage user sessions across different iOS versions.

Step-by-Step Guide

Open Your AppDelegate.swift file: Locate the file where you configure your application's launch.

Implement didFinishLaunchingWithOptions Method: Replace the existing logic or add the following code within the didFinishLaunchingWithOptions method. This will ensure that every time the app launches, Firebase checks if the user is logged in.

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

Key Code Explanation

Check Current User: The line let currentUser = Auth.auth().currentUser checks if there is an active user session.

Instantiate Navigation Controller: If the user is logged in, we create a navigation controller that leads directly to the app's main interface, allowing them to bypass the login screen.

Window Initialization: window = UIWindow() initializes a new window where your app's interface will be displayed.

Conclusion

By moving the user session check into the AppDelegate for iOS 12 users, you can streamline the user experience across different iOS versions. This fix not only resolves the immediate issue but also enhances overall user satisfaction by eliminating unnecessary login prompts. Implement this solution today to make your app more robust and user-friendly!

If you have any further questions or experiences related to this topic, feel free to share in the comments below!