三步实现ionic3点击退出app程序

其实也很简单。大概分为三步

1.tabs.ts文件需要声明一下

@ViewChild('mainTabs') tabs:Tabs;//声明tabs组件(<ion-tabs #mainTabs >)

2.app.component.ts文件

@ViewChild('myNav') nav: Nav;//声明根组件(<ion-nav #myNav [root]="rootPage">)

3.贴代码  

platform.ready().then(()=>{ this.exitApp(); }) public backButtonPressed: boolean = false; exitApp() { this.platform.registerBackButtonAction(() => { //控制modal、系统自带提示框 let overlay = this.appCtrl._appRoot._overlayPortal.getActive() || this.appCtrl._appRoot._modalPortal.getActive(); if (overlay) { overlay.dismiss(); return; } let activeVC = this.nav.getActive(); let page = activeVC.instance; if (page.tabs) { let activeNav = page.tabs.getSelected(); if (activeNav.canGoBack()) { return activeNav.pop(); } else { return this.showExit(); } } if (page instanceof LoginPage) {//查看当前页面是否是登陆页面 this.showExit(); return; } this.appCtrl.getActiveNav().pop();//剩余的情况全部使用全局路由进行操作 }); } //双击退出函数 showExit() { if (this.backButtonPressed) { this.platform.exitApp(); } else { this.presentToast();//再按一次退出 this.backButtonPressed = true; setTimeout(() => { this.backButtonPressed = false; }, 2000) } } presentToast() { let toast = this.toastCtrl.create({ message: '再按一次退出应用', duration: 2000, position: 'top' }); toast.onDidDismiss(() => { console.log('Dismissed toast'); }); toast.present(); }