HarmonyOS 怎么在页面退出时关闭所有页面内打开的弹窗

可以创建一个全局弹窗管理的对象，注册全局事件来维护弹窗对象。参考代码如下：

onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
  let eventhub = this.context.eventHub;
  AppStorage.setOrCreate('dialogList', []);
  eventhub.on('addDiaLog', (data: CustomDialogController ) => {
  let dialogList:SubscribedAbstractProperty<CustomDialogController[]> = AppStorage.link('dialogList');
  let dialoginfo:CustomDialogController[] = dialogList.get();
  dialoginfo.push(data);
  dialogList.set(dialoginfo)
});
eventhub.on('closeAllDiaLog', ()=>{
  let dialogList:SubscribedAbstractProperty<CustomDialogController[]> = AppStorage.link('dialogList');
  let dialoginfo:CustomDialogController[] = dialogList.get();
  for (let elem of dialoginfo.values()) {
    elem.close();
  }
})

hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
}

然后在弹框弹出的地方使用

this.context.eventHub.emit('addDiaLog', this.controller);

退出页面的地方使用

this.context.eventHub.emit('closeAllDiaLog');