iOS消息推送的基本流程
1.注册：为应用程序申请消息推送服务。此时你的设备会向APNs服务器发送注册请求。2. APNs服务器接受请求，并将deviceToken返给你设备上的应用程序 3.客户端应用程序将deviceToken发送给后台服务器程序，后台接收并储存。 4.后台服务器向APNs服务器发送推送消息 5.APNs服务器将消息发给deviceToken对应设备上的应用程序
使用leanclound进行消息推送
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接入Leanclound
1.首先需要创建一个react-native项目
react-native init projectName
2.在leancloud创建一个同名项目,并记录好appid和appkey
3.项目创建成功后,安装推送所需的模块（需要cd到工程目录）
1.使用yarn安装
yarn add leancloud-storage
yarn add leancloud-installation
2.使用npm安装
npm install leancloud-storage --save
npm install leancloud-installation --save
4.在项目目录下新建一个文件夹,名字为pushservice,在里面添加一个js文件PushService.js,处理消息推送的逻辑,
1.在index.js初始化leanclound
import AV from 'leancloud-storage'
...
/*
*添加注册的appid和appkey
*/
const appId = 'HT23EhDdzAfFlK9iMTDl10tE-gzGzoHsz'
const appKey = 'TyiCPb5KkEmj7XDYzwpGIFtA'
/*
*初始化
*/
AV.initialize(appId,appKey);
/*
*把Installation设为全局变量,在其他文件方便使用
*/
global.Installation = require('leancloud-installation')(AV);
...
2.iOS端配置
首先，在项目中引入RCTPushNotification,详情请参考:Linking Libraries - React Native docs
步骤一：将PushNotification项目拖到iOS主目录,PushNotification路径:当前项目/node_modules/react-native/Libraries/PushNotificationIOS目录下
步骤二：添加libRCTPushNotification静态库，添加方法：工程Targets-Build Phases-link binary with Libraries 点击添加，搜索libRCTPushNotification.a并添加
步骤三:开启推送功能，方法：工程Targets-Capabilities 找到Push Notification并打开
步骤四:在Appdelegate.m文件添加代码
#import <React/RCTPushNotificationManager.h>
...
//注册推送通知
-(void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings{
[RCTPushNotificationManager didRegisterUserNotificationSettings:notificationSettings];
}
// Required for the register event.
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
[RCTPushNotificationManager didRegisterForRemoteNotificationsWithDeviceToken:deviceToken];
}
// Required for the notification event. You must call the completion handler after handling the remote notification.
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
NSLog(@"收到通知:%@",userInfo);
[RCTPushNotificationManager didReceiveRemoteNotification:userInfo fetchCompletionHandler:completionHandler];
}
// Required for the registrationError event.
- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error
{
NSLog(@"error == %@" , error);
[RCTPushNotificationManager didFailToRegisterForRemoteNotificationsWithError:error];
}
// Required for the localNotification event.
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
NSLog(@"接受通知:%@",notification);
[RCTPushNotificationManager didReceiveLocalNotification:notification];
}
5. 获取deviceToken,并将deviceToken插入到_Installation
找到PushService文件，编写代码
//引用自带PushNotificationIOS
const PushNotificationIOS = require('react-native').PushNotificationIOS;
...
class PushService {
//初始化推送
init_pushService = () => {
//添加监听事件
PushNotificationIOS. addEventListener('register',this.register_push);
//请求权限
PushNotificationIOS.requestPermissions();
}
//获取权限成功的回调
register_push = (deviceToken) => {
//判断是否成功获取到devicetoken
if (deviceToken) {
this.saveDeviceToken(deviceToken);
}
}
//保存devicetoken到Installation表中
saveDeviceToken = (deviceToken) => {
global.Installation.getCurrent()
.then(installation => {
installation.set('deviceType', 'ios');
installation.set('apnsTopic', '工程bundleid');
installation.set('deviceToken', deviceToken);
return installation.save();
});
}
}
修改App.js文件 在componentDidMount初始化推送
import PushService from './pushservice/PushService';
...
componentDidMount () {
//初始化
PushService.init_pushService();
}
运行项目，必须真机才能获取到deviceToken,模拟器获取不到,看看是否保存的deviceToken,如果保存成功,leandclound后台能发现_Installation表多了一条数据
进行到这步骤说明推送已经完成了一大半了，APP当然还需要包括以下功能:
- APP在前台、后台或者关闭状态下也能收到推送消息
- 点击通知能够对消息进行操作,比如跳转到具体页面
APP处于前台状态时通知的显示
当APP在前台运行时的通知iOS是不会提醒的(iOS10后开始支持前台显示),因此需要实现的功能就是收到通知并在前端显示,这时候就要使用一个模块来支持该功能了,那就是react-native-message-bar
首先就是安装react-native-message-bar模块了
yarn add react-native-message-bar //yarn安装
或者
npm install react-native-message-bar --save //npm安装
安装成功之后，在App.js文件中引入并注册MessageBar
...
/*
*引入展示通知模块
*/
const MessageBarAlert = require('react-native-message-bar').MessageBar;
const MessageBarManager = require('react-native-message-bar').MessageBarManager;
...
componentDidMount () {
//初始化
PushService.init_pushService();
MessageBarManager.registerMessageBar(this.alert);
}
...
render() {
const {Nav} = this.state
if (Nav) {
return (
//这里用到了导航,所以需要这样写,布局才不会乱 MessageBarAlert绑定一个alert
<View style={{flex: 1,}}>
<Nav />
<MessageBarAlert ref={(c) => { this.alert = c }} />
</View>
)
}
return <View />
}
然后再对PushService进行修改,新增对notification事件监听和推送消息的展示
import { AppState, NativeModules, Alert, DeviceEventEmitter } from 'react-native';
...
//初始化推送
init_pushService = () => {
//添加监听事件
PushNotificationIOS. addEventListener('register',this.register_push);
PushNotificationIOS.addEventListener('notification', this._onNotification);
//请求权限
PushNotificationIOS.requestPermissions();
}
_onNotification = ( notification ) => {
var state = AppState.currentState;
// 判断当前状态是否是在前台
if (state === 'active') {
this._showAlert(notification._alert);
}
}
...
_showAlert = ( message ) => {
const MessageBarManager = require('react-native-message-bar').MessageBarManager;
MessageBarManager.showAlert({
title: '您有一条新的消息',
message: message,
alertType: 'success',
stylesheetSuccess: {
backgroundColor: '#7851B3',
titleColor: '#fff',
messageColor: '#fff'
},
viewTopInset : 20
});
}
...
最后重新运行APP并在leanclound发送一条消息,看是否在APP打开状态也能收到通知，到了这里推送就完成了
