Clarify swizzling requirement for APNs token registration in AppDelegate

[Preacher999987]

Clarify swizzling requirement for APNs token registration in AppDelegate

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[gemini-code-assist]

Summary of Changes

Hello @Preacher999987, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on improving the clarity of documentation within the AppDelegate.swift file in the MessagingExampleSwift project. The primary goal is to correct and clarify the understanding of how APNs device token registration interacts with Firebase Messaging, specifically addressing the requirement for a certain AppDelegate method even when method swizzling is enabled.

Highlights

• Documentation Clarity: Updated comments in AppDelegate.swift to explicitly state that the application(_:didRegisterForRemoteNotificationsWithDeviceToken:) method must still be declared, even when Firebase Messaging's method swizzling is enabled. This clarifies that Firebase uses this method internally to intercept and register the APNs device token, and its omission would prevent token reception.

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[gemini-code-assist]

Code Review

This pull request provides a helpful clarification in the comments regarding the necessity of implementing application(_:didRegisterForRemoteNotificationsWithDeviceToken:) even when method swizzling is enabled in Firebase Messaging. The previous comment was misleading, and this change improves the clarity of the example code. I have one minor suggestion regarding code formatting to maintain consistency.

[gemini-code-assist]

This line contains a tab character, which is likely unintentional for a blank line. Swift style guides, such as the Google Swift Style Guide, recommend using spaces over tabs for consistency. Mixed whitespace can lead to formatting issues across different editors and environments. Please remove the tab character to make this a truly empty line.