Ionic 2:如何处理在应用程序中检查退出确认的硬件后退按钮

问题描述

我面临一个问题，如何处理默认手机的后退按钮，该按钮在退出应用程序时检查确认，如果我按下后退按钮，应该调用一些显示弹出窗口的处理程序，以确认退出.或者有任何方法调用 registerBackButtonAction()?或者是如何在IONIC 2中使用它?请帮帮我.提前致谢.

I am facing an issue how to handle the default mobile's back button which checks the confirmation while exiting from the application, if I pressed the back button there should invoke some handler which shows pop-up, for confirm exiting. OR there is any method call registerBackButtonAction()? or is it so how to use it in IONIC 2,? Please help me out. Thanks in Advance.

推荐答案

这是我的解决和工作代码.谢谢大家.

This is my resolved and working Code. Thank you everyone.

constructor(platform: Platform,public alertCtrl: AlertController,public toastCtrl:ToastController) {
    platform.ready().then(()=>{
       platform.registerBackButtonAction(()=>this.myHandlerFunction());
       StatusBar.styleDefault();
      Splashscreen.hide();
})
  }

    myHandlerFunction(){
     let toast = this.toastCtrl.create({
      message: "Press Again to Confirm Exit",
      duration: 3000
    });
    toast.present(); 
     }