ionic 4防止/禁用设备硬件后退按钮 [英] ionic 4 prevent/disable device hardware backbutton

问题描述

我在ionic 4项目中使用了角向布线(@ angular/router)来禁用ionic 4中的设备后退按钮prevent-default在我的代码中不起作用

I'm using angular routing(@angular/router) for ionic 4 project to disable the device back-button in ionic 4 prevent-default is not working below is my code in

app.component.ts

app.component.ts

    this.platform.backButton.subscribe(() => {
        if (this.router.url === '/Login') {
          this.util.presentAppExitAlert();
        } else {
          // event.preventDefault();
          console.log("invoing url ", this.router.url);
        }
      });
    });

我无法在此处禁用设备后退按钮的任何帮助

i am not able to disable the device back-button any help here

推荐答案

initializeApp() {
    this.platform.ready().then(() => {
      this.platform.backButton.subscribeWithPriority(9999, () => {
        document.addEventListener('backbutton', function (event) {
          event.preventDefault();
          event.stopPropagation();
          console.log('hello');
        }, false);
      });
      this.statusBar.styleDefault();
    });
  }

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