检测是否通过推送通知打开了React Native iOS应用程序

Question

检测应用程序是否通过推送通知启动/打开,描述了如何通过用户点击推送通知来检测本机iOS应用程序是否已打开(即启动或仅启动).

我如何在React Native中做同样的事情？PushNotificationIOS让我附上通知听众......

PushNotificationIOS.addEventListener('notification', function (notification) {
    console.log('got a notification', notification);
});

但是当应用程序在前台收到推送通知时,以及当我通过推送通知打开应用程序时,这都会触发.

如何特别检测第二种情况？

Answer 1

这里有两种情况需要以不同的方式检测:

1. 该应用程序已被完全终止(例如,通过重新启动手机,或者通过双攻的家,然后滑动它关闭在后台运行的应用程序的列表),并正在推出由用户的水龙头上的推送通知.这可以通过该React.PushNotificationIOS.getInitialNotification方法检测(并获取通知的数据).
2. 应用程序已被暂停,并且用户点击推送通知后再次激活该应用程序.只是像在本机应用程序,你可以告诉大家,这种情况正在发生,因为iOS的通过抽头通知您的应用程序时,它被打开(即使它是一个老的通知),使您的通知处理程序,以火,当你的应用程序是在UIApplicationStateInactive状态(或'background'state,正如React Native的AppStateIOS类所称的那样).

用于处理这两种情况的代码(您可以将其放在您index.ios.js或在应用程序启动时运行的其他位置):

import React from 'react';
import { PushNotificationIOS, AppState } from 'react-native';

function appOpenedByNotificationTap(notification) {
  // This is your handler. The tapped notification gets passed in here.
  // Do whatever you like with it.
  console.log(notification);
}

PushNotificationIOS.getInitialNotification().then(function (notification) {
  if (notification != null) {
    appOpenedByNotificationTap(notification);
  }
});

let backgroundNotification;

PushNotificationIOS.addEventListener('notification', function (notification) {
  if (AppState.currentState === 'background') {
    backgroundNotification = notification;
  }
});

AppState.addEventListener('change', function (new_state) {
  if (new_state === 'active' && backgroundNotification != null) {
    appOpenedByNotificationTap(backgroundNotification);
    backgroundNotification = null;
  }
});

Answer 2

对于本地通知

getInitialNotification 不适用于本地通知.

不幸的是,从React Native的0.28开始,using 在本地推送通知启动时PushNotificationIOS.getInitialNotification()总是返回一个null值.

正因为如此,你需要捕捉推送通知作为launchOption你的AppDelegate.m并把它传递到本地做出反应作为appProperty.

以下是从冷启动或后台/非活动状态接收本地推送通知所需的全部内容.

AppDelegate.m (原生iOS代码)

// Inside of your didFinishLaunchingWithOptions method...

// Create a Mutable Dictionary to hold the appProperties to pass to React Native.
NSMutableDictionary *appProperties = [NSMutableDictionary dictionary];

if (launchOptions != nil) {
  // Get Local Notification used to launch application.
  UILocalNotification *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];

  if (notification) {
    // Instead of passing the entire Notification, we'll pass the userInfo,
    // where a Record ID could be stored, for example.
    NSDictionary *notificationUserInfo = [notification userInfo];

    [ appProperties setObject:notificationUserInfo  forKey:@"initialNotificationUserInfo" ];
  }
}

// Your RCTRootView stuff...

rootView.appProperties = appProperties;

index.ios.js (React Native)

componentDidMount() {
  if (this.props.initialNotificationUserInfo) {
    console.log("Launched from Notification from Cold State");
    // This is where you could get a Record ID from this.props.initialNotificationUserInfo
    // and redirect to the appropriate page, for example.
  }

  PushNotificationIOS.addEventListener('localNotification', this._onLocalNotification);
}

componentWillUnmount() {
  PushNotificationIOS.removeEventListener('localNotification', this._onLocalNotification);
}

_onLocalNotification( notification ) {
  if (AppState.currentState != 'active') {
    console.log("Launched from Notification from Background or Inactive state.");
  }
  else {
    console.log("Not Launched from Notification");
  }
}

确保导入PushNotificationIOS和AppState从react-native.

我还没有使用远程推送通知进行测试.也许@MarkAmery的方法可以很好地使用远程推送通知,但不幸的是,从React Native的当前状态来看,这是我能够从冷状态工作获得本地推送通知的唯一方法.

这在React Native中是高度无证的,所以我在他们的GitHub repo上创建了一个问题,以引起对它的注意,并希望纠正它.如果您正在处理此问题,请转到此处并竖起大拇指,使其渗透到顶部.

https://github.com/facebook/react-native/issues/8580