如何修复无法读取离子型

Question

我在Firebase中无法读取未定义错误的属性“ verifyPhoneNumber”以进行电话身份验证。

我从'firebase'中添加了import *作为firebase； 然后通过将插件添加到项目的config.xml中来安装插件

<plugin name="Cordova-plugin-firebase" spec="^2.0.0" />

还安装此插件：

ionic Cordova plugin add https://github.com/jestcastro/cordova-plugin-firebase.git --save

verificationId:any;
code: string="";

 send(){
    console.log('in send function');
    (<any>window).FirebasePlugin.verifyPhoneNumber("+91**********",60,(credential)=>{
      alert('SMS Sent Successfully');
      console.log(credential);

      this.verificationId =credential.verificationId;
    },function(error){
      console.error(error);
    });
  }

  verify(){
    console.log('in verify function');
    let signInCredential = firebase.auth.PhoneAuthProvider.credential(VerificationId,Code);

    firebase.auth().signInWithCredential(signInCredential).then((info)=>{
      console.log(info);
    },(error)=>{
      console.log(error)
    });
  }

我除了要在给定的手机号上发送OTP并进行验证。