带有 setTimeout 和推送通知的后台应用程序

Question

We're running into an issue where Push Notification code is being executed before the setTimeout handler is executed when the app is coming into the foreground. Here is the sequence of events:

1. User launches the app. setTimeout(this.logout, 10000) gets called.
2. App is put into the background. Timer continues to count down.
3. Wait for 10 seconds to pass. Because the app is in the background, this.logout callback will not be invoked until the app is bought back into the foreground.
4. Push notification is sent to device.
5. Now, user taps on the Push Notification, which opens the app.
6. Push Notification code is executed
7. this.logout code is executed immediately.

The result is that the user is kicked out of the app before he can view the Push Notification.

Is there a way to somehow re-arrange the events in the Event Queue so that this.logout is executed first and Push Notification handling code executed second?

Edit: We're using the Expo Push Notifications SDK

Sample Code

componentDidMount() {
  this.notifications = Notifications.addListener(this.handleNotification);
  this.timeout = setTimeout(this.logout, 10000);
}

componentWillUnmount() {
  Notifications.remove(this.notifications);
}

this.handleNotification = () => { ... }
this.logout = () => { ... }

Answer 1

我通过关闭 setTimeout 计时器并使用时间戳 (Date.now() - startTime) 来查找经过的时间来解决它。