关闭ionic2日期时间弹出窗口，同时按下后退按钮？

我使用的是ionic2 ion datetime，当我回到我的应用程序中时，仍然会显示日期选择器弹出窗口，尽管在后面的页面中没有ion数据时间标签。请帮助我按“后退”按钮移除此弹出按钮

.html文件

<ion-datetime id="dateofbirth" class="date" displayFormat="DD MMMM YYYY" [max]="maxDate" [min]="minDate">

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在.ts文件中使用下面的代码，在该文件中您的组件带有ion日期选择器

ionViewWillLeave(){
        let backDrop: any = document.getElementsByTagName('ion-picker-cmp');
        if(backDrop.length > 0){
            for(let i = 0; i< backDrop.length; i++){
                backDrop[i].style.display = 'none';
            }
        }
      }

ionViewWillLeave（）{
let background:any=document.getElementsByTagName（'ion-picker-cmp'）；
如果（background.length>0）{
for（设i=0；i

按以下方式修改你的app.component.ts文件

  import { Platform, IonicApp } from 'ionic-angular';

  constructor(public platform: Platform, private ionicApp: IonicApp){}

  initializeApp() {
    this.platform.ready().then(() => {
      //back button handle
      this.platform.registerBackButtonAction(() => {
        let activePortal = this.ionicApp._loadingPortal.getActive() ||
          this.ionicApp._modalPortal.getActive() ||
          this.ionicApp._toastPortal.getActive() ||
          this.ionicApp._overlayPortal.getActive();

        if (activePortal) {
          activePortal.dismiss();
        }
      });
    });
  }

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伟大的欢迎@AniAny为爱奥尼亚-4提供解决方案？

  import { Platform, IonicApp } from 'ionic-angular';

  constructor(public platform: Platform, private ionicApp: IonicApp){}

  initializeApp() {
    this.platform.ready().then(() => {
      //back button handle
      this.platform.registerBackButtonAction(() => {
        let activePortal = this.ionicApp._loadingPortal.getActive() ||
          this.ionicApp._modalPortal.getActive() ||
          this.ionicApp._toastPortal.getActive() ||
          this.ionicApp._overlayPortal.getActive();

        if (activePortal) {
          activePortal.dismiss();
        }
      });
    });
  }