硬件后退按钮被调用两次 ionic5

Question

我尝试配置硬件后退按钮并在其中调用一个函数：

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

但是当我点击按钮时，它会被调用两次。我正在使用 ionic5。 有任何想法吗？

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
      });
    }