如何基于@react-native-firebase/messaging实现React Native持续提醒式通知管理（自定义声音，需用户操作后停止）

Hey there! Let's walk through whether your current approach will work, and how to tweak it to make sure you get that persistent, custom sound reminder until the user interacts with the notification.

First, Your Core Idea Is On Track #

Skipping the default FCM notification payload and handling everything via local notifications + custom sound loops is the right call here—system default notifications don't support repeating alerts until user action, so building this logic yourself is necessary. Your playSampleSound module is absolutely a key part of making this work, but we need to fix some gaps in your current code to ensure reliability across all app states (foreground, background, killed).

Issues With Your Current Code Example #

Let's break down the problems in the snippet you shared:

• Background Timer Limitations: Using setInterval directly inside setBackgroundMessageHandler won't work reliably long-term. Both Android and iOS restrict background task execution to save battery—your timer will likely be killed by the OS after a short while, especially if the app is fully closed.
• No Stop Condition: There's no logic to cancel the timer when the user taps the notification. Even after the user interacts with the alert, the sound would keep looping indefinitely (until the OS kills it).
• Duplicate Timers: If multiple notifications come in before the user handles the first one, you'll spawn multiple overlapping timers, leading to chaotic sound playback.
• App Killed State Uncertainty: When the app is fully killed, setBackgroundMessageHandler might not trigger at all on some devices (depending on manufacturer battery optimizations), so you need a fallback to initialize the alert loop when the app is relaunched via notification tap.

How To Refine Your Implementation #

Here's what you need to add/modify to make this solid:

1. Use System-Level Scheduling Instead of setInterval
   For background/killed app states, rely on platform-specific scheduling APIs:

   • Android: Use AlarmManager to schedule periodic sound triggers. Wrap your sound playback in a foreground service (you'll need the FOREGROUND_SERVICE permission) to prevent the OS from killing it.
   • iOS: Use the UserNotifications framework to schedule local notification triggers, or AVAudioPlayer with a configured AVAudioSession set to the playback category (enable background audio in your Xcode project's Background Modes).

2. Track Notification State
   Store whether a notification is unread/untapped using something like AsyncStorage or a lightweight local database. This lets you:

   • Avoid spawning duplicate timers for the same notification.
   • Cancel the timer immediately when the user taps the notification (update the state and stop the scheduler).

3. Handle Notification Tap Properly
   In your PushNotification.configure setup, add logic to the onNotification callback to detect when the user taps the alert:

   PushNotification.configure({
     onNotification: (notification) => {
       if (notification.userInteraction) {
         // User tapped the notification—stop the sound loop
         clearInterval(yourTimerId); // Or cancel platform scheduler
         markNotificationAsHandled(notification.id); // Update your stored state
       }
     },
     // ... other configs
   });
   

4. Fallback for App Killed State
   When the app is launched from a notification tap, check your stored state for unhandled notifications. If any exist, either stop the sound loop immediately or resume it only if the notification is still unprocessed.

5. Ensure Sound Playback Works in Background
   Your playSampleSound module needs to be optimized for background use:

   • Android: Use MediaPlayer instead of a lightweight sound API, and run it inside a foreground service with a persistent notification (required to keep the service alive).
   • iOS: Configure your AVAudioSession to allow background playback (you can add this via a native React Native module or custom iOS code).

Final Verdict #

Yes, your playSampleSound module is a critical component of this feature—but it needs to be paired with system-level scheduling, state tracking, and proper background permissions to work reliably across all app states. With these adjustments, you'll be able to deliver that persistent custom sound alert until the user interacts with the notification.

内容的提问来源于stack exchange，提问作者Anuj Raghuvanshi