firebase.notifications().getInitialNotification()
是 Firebase Cloud Messaging (FCM) 的一个方法,用于获取应用程序启动时收到的初始通知。这个方法主要用于处理应用程序从后台恢复到前台时,展示通知的逻辑。
当应用程序在 iOS 的后台时,firebase.notifications().getInitialNotification()
可能不起作用的原因主要有以下几点:
getInitialNotification()
方法。import firebase from 'firebase/app';
import 'firebase/messaging';
if (firebase.apps.length === 0) {
firebase.initializeApp({
// Your Firebase config
});
}
const messaging = firebase.messaging();
messaging.onBackgroundMessage((remoteMessage) => {
console.log('[FCM] Background message received:', remoteMessage);
});
messaging.onMessage((remoteMessage) => {
console.log('[FCM] Foreground message received:', remoteMessage);
const initialNotification = messaging.getInitialNotification();
if (initialNotification) {
console.log('[FCM] Initial notification:', initialNotification);
// Handle initial notification
}
});
import { PermissionsAndroid } from 'react-native';
const requestNotificationPermission = async () => {
try {
const granted = await PermissionsAndroid.request(
PermissionsAndroid.PERMISSIONS.ACCESS_NOTIFICATION_POLICY,
{
title: 'Notification Permission',
message: 'This app needs access to send you notifications',
buttonNeutral: 'Ask Me Later',
buttonNegative: 'Cancel',
buttonPositive: 'OK',
}
);
if (granted === PermissionsAndroid.RESULTS.GRANTED) {
console.log('Notification permission granted');
} else {
console.log('Notification permission denied');
}
} catch (err) {
console.warn(err);
}
};
requestNotificationPermission();
if (firebase.apps.length === 0) {
firebase.initializeApp({
apiKey: "YOUR_API_KEY",
authDomain: "YOUR_AUTH_DOMAIN",
projectId: "YOUR_PROJECT_ID",
storageBucket: "YOUR_STORAGE_BUCKET",
messagingSenderId: "YOUR_MESSAGING_SENDER_ID",
appId: "YOUR_APP_ID",
});
}
通过以上方法,可以有效解决 firebase.notifications().getInitialNotification()
在 iOS 后台不起作用的问题。
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