platform.ready().then(() => {
this.platform.registerBackButtonAction(() => {
let activePortal = this.ionicApp._modalPortal.getActive() ||this.ionicApp._overlayPortal.getActive();
console.log(activePortal)
let loadingPortal = this.ionicApp._loadingPortal.getActive();
if (activePortal) {//其他的关闭 activePortal.dismiss().catch(() => { }); activePortal.onDidDismiss(() => { }); return; } if (menuCtrl.isOpen()) {
menuCtrl.close(); console.log("closing menu"); return; } if (loadingPortal) { //loading的话，返回键无效 return; }
//获取NavController if(this.keyboard.isOpen()){ this.keyboard.close(); return; }
let activeNav: NavController = this.appCtrl.getActiveNav();
console.log(this.appCtrl); console.log(activeNav)
//如果可以返回上一页，则执行pop
if (activeNav.canGoBack()) { activeNav.pop(); } else {
//执行退出 this.showExit();
} });
}); private alertT(content){
this.alert = this.alertCtr.create({
// spinner: 'hide',
title:'' ,
enableBackdropDismiss:false,
// duration: 3000
});
this.alert.present();
}
//退出应用方法
private showExit(): void {
//如果为true，退出
if (this.backButtonPressed) {
this.platform.exitApp();
} else {
//第一次按，弹出Toast
if (localStorage.getItem("language") === 'zh') {
this.commonUtils.showToast("再按一次退出应用", 2000)
} else {
this.commonUtils.showToast("Press again to exit the app", 2000)
}
// this.toastCtrl.create({
// message: '再按一次退出应用',
// duration: 2000,
// position: 'bottom'
// }).present();
//标记为true
this.backButtonPressed = true;
//两秒后标记为false，如果退出的话，就不会执行了
setTimeout(() => this.backButtonPressed = false, 2000);
}
}主要解决的问题是：modal 的关闭
代码：
let activePortal = ionicApp._loadingPortal.getActive() ||
ionicApp._modalPortal.getActive() ||
ionicApp._toastPortal.getActive() ||
ionicApp._overlayPortal.getActive(); if (activePortal) {
ready = false;
activePortal.dismiss();
activePortal.onDidDismiss(() => { ready = true; }); Logger.log("handled with portal");
return;
} if (menuCtrl.isOpen()) {
menuCtrl.close(); Logger.log("closing menu");
return;
}
另外本来 这块内容是写再指令里的发现 指令里不能用ionicApp 这个方法，最好把内容放到初始化位置。