ionic4 实现双击返回退出APP
最近升级到ionic4 在实现双击返回键退出APP的功能时发现platform.exitApp()方法不存在
然后就是苦逼的百度，发现大都是ionic3及以前的方法，引入的是ionic-angular资源实现的退出，于是替换@ionic/angular为ionic-angular是的各种报错崩溃...
黄天不负有心人，最终ionic4实现退出的方法还是被我找到了，废话不多说看实现代码：
首先感谢：https://stackoverflow.com/questions/55024239/my-hardware-back-button-action-is-not-working-in-ionic-4?noredirect=1&lq=1
import { Component } from '@angular/core';
import { Router } from '@angular/router';
import { Platform, AlertController } from '@ionic/angular';
import { SplashScreen } from '@ionic-native/splash-screen/ngx';
import { StatusBar } from '@ionic-native/status-bar/ngx';
@Component({
selector: 'app-root',
templateUrl: 'app.component.html'
})
export class AppComponent {
constructor(
private platform: Platform,
private splashScreen: SplashScreen,
private statusBar: StatusBar,
private router: Router,
private alertController: AlertController
) {
this.initializeApp();
this.backButtonEvent();
}
initializeApp() {
this.platform.ready().then(() => {
this.statusBar.styleDefault();
this.splashScreen.show();
});
}
lastTimeBackPress = 0;
timePeriodToExit = 2000;
backButtonEvent() {
this.platform.backButton.subscribe(() => {
if (this.router.url == 'home') {
if (new Date().getTime() - this.lastTimeBackPress < this.timePeriodToExit) {
navigator['app'].exitApp(); //退出APP
} else {
//this.presentAlertConfirm();
this.lastTimeBackPress = new Date().getTime();//再按
}
// navigator['app'].exitApp(); //ionic4 退出APP的方法
}
})
}
async presentAlertConfirm() {
const alert = await this.alertController.create({
// header: 'Confirm!',
message: '您要退出APP吗?',
buttons: [
{
text: '取消',
role: 'cancel',
cssClass: 'secondary',
handler: (blah) => {
}
}, {
text: '退出',
handler: () => {
navigator['app'].exitApp();
}
}
]
});
await alert.present();
}
}
demo地址：https://github.com/HuXiaofu/ionic4Demo