如何在Expo/React Native中保持我的计时器应用程序在后台运行

import * as TaskManager from 'expo-task-manager';
import * as Notifications from 'expo-notifications';

TaskManager.defineTask('myTaskName', async () => {
  // 这里执行你的后台任务，比如更新计时器状态
  console.log('后台任务运行中...');
  
  // 示例：发送通知
  await Notifications.scheduleNotificationAsync({
    content: {
      title: '计时器提醒',
      body: '你的计时器已经运行了XX时间。',
    },
    trigger: null, // 立即触发
  });
});

// 启动后台任务
TaskManager.scheduleTaskAsync('myTaskName', {
  interval: 'minute', // 每分钟运行一次
  persistence: TaskManager.PERSISTENCE_FOREVER, // 持久化任务
});

{
  "expo": {
    "android": {
      "permissions": ["android.permission.WAKE_LOCK"]
    },
    "ios": {
      "infoPlist": {
        "UIBackgroundModes": ["processing"]
      }
    }
  }
}

import * as Notifications from 'expo-notifications';

const registerForPushNotificationsAsync = async () => {
  const { status: existingStatus } = await Notifications.getPermissionsAsync();
  let finalStatus = existingStatus;

  if (existingStatus !== 'granted') {
    const { status } = await Notifications.requestPermissionsAsync();
    finalStatus = status;
  }

  if (finalStatus !== 'granted') {
    alert('Failed to get push token for push notification!');
    return;
  }
};