Onclick推送通知时重定向页面 [英] Redirect Page When Onclick Pushnotifications

问题描述

我正在使用FCM PLugin Ionic 2

I am using FCM PLugin Ionic 2

我的应用程序组件下方

   constructor(public menu1: MenuController,public alertCtrl:AlertController,public platform: Platform,public authservice:Authservice) {

      this.initializeApp();

  }


initializeApp() {

    this.platform.ready().then(() => {
      // Okay, so the platform is ready and our plugins are available.
      // Here you can do any higher level native things you might need.
      StatusBar.styleDefault();
      Splashscreen.hide();

      //Push Notifications

      if(typeof(FCMPlugin) !== "undefined")
      {
        FCMPlugin.getToken(function(t){
          console.log("Use this token for sending device specific messages\nToken: " + t);
        }, function(e){
          console.log("Uh-Oh!\n"+e);
        });
         FCMPlugin.onNotification(function(d){
          if(d.wasTapped){  
                            console.log(d);
            var nav:NavController = this.app.getComponent("nav");
            this.nav = nav;
            nav.setRoot(MycomplaintsPage);
} else {

            console.log("Push Notification", d);
            console.log("you have new notifications");
          }
        }, function(msg){
                      }, function(err){
          console.log("Arf, no good mate... " + err);
        });
      }

}

工作正常，但是单击通知页面"无法重定向.

It's work Perfectly.But Click on Notifications Page cannot redirect.

我收到此错误

未捕获的TypeError:无法读取未定义的属性'getComponent'.

Uncaught TypeError: Cannot read property 'getComponent' of undefined.

如何解决此问题.

请教我， 谢谢

推荐答案

如果您使用常规函数，则this对象会更改，即它属于该函数而不是该类，因此也未定义this.app. 箭头功能 ()=>{}不定义this，并使用外部this. 使用箭头函数进行回调

The this object changes if you use regular functions i.e it belongs to the function not the class so this.app is nor defined. Arrow functions ()=>{} doesn't define this and the outer this is used. Use arrow functions for callbacks

 FCMPlugin.onNotification((d)=>{
          if(d.wasTapped){  
                            console.log(d);
            var nav:NavController = this.app.getComponent("nav");
            this.nav = nav;
            nav.setRoot(MycomplaintsPage);
            //...
         });

或在通话前设置self=this并使用self.

Or set self=this before the call and use self.

let self = this.//declare here

 FCMPlugin.onNotification(function(d){
          if(d.wasTapped){  
                            console.log(d);
            var nav:NavController = self.app.getComponent("nav");//use here
            this.nav = nav;
            nav.setRoot(MycomplaintsPage);
            //...
         });

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