Ionic 4 Page Lifecycle Problem

@LazCoder wrote:

Hİ, When I add the following code to my app, the app closes when I press the back key of the phone when I enter the new page.

What should I do to prevent the application from closing when I move to a new page?

.....
subscription: any;
.....
ionViewWillEnter(){
    this.subscription = this.platform.backButton.subscribe(()=>{
      navigator['app'].exitApp();
    });
  }

  ionViewWillLeave(){
    this.subscription.unsubscribe();
  }

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