如何使用ng-show和hide ionic2

我试图显示和隐藏播放和暂停按钮，单击播放时我需要隐藏暂停按钮，反之亦然。我尝试过这样

<ion-content padding>    
    <button ion-button *ngIf="status"  name="play" (click)="itemSelected()" >Play</button> 
    <button ion-button *ngIf="!status" name="square" (click)="stopPlayback()" >stop</button>        
</ion-content>

    import { Component } from '@angular/core';
import { NavController, NavParams, AlertController } from 'ionic-angular';


@Component({
    selector: 'page-login',
    templateUrl: 'login.html'
})

export class LoginPage {

  status: boolean = false;

    constructor(public navCtrl: NavController,
                public alertCtrl: AlertController,
                public navParams: NavParams,) {                  

                }

    ionViewDidLoad() {
        console.log('ionViewDidLoad LoginPage');
    }
 itemSelected(){
      this.status = true
    }
    stopPlayback(){
      console.log("stop");
      this.status = false
    }

}

有人可以帮助我解决这个问题吗，谢谢