硬件后退按钮被调用两次 ionic5

Question

I try to configure hardware back button and call a function inside it:

import { Platform } from '@ionic/angular';
constructor(private platform: Platform) {
  this.platform.backButton.subscribeWithPriority(10, () => {
    //call my function here
  });
}

but when i click on the button it's called twice.I'm working with ionic5. any ideas?

Answer 1

You can try async and await as follow

import { Platform } from '@ionic/angular';
    constructor(private platform: Platform) {
      this.platform.backButton.subscribeWithPriority(10, async () => {
        await this.functionCall() // Your function call goes here
      });
    }