Question

我环顾了Ionic 4的新平台，似乎registerBackButtonAction函数已从中删除。

还有其他方法可以处理Android硬件后退按钮吗？

Answer 1

更新：此问题已在dfac9dc

中修复

Related: how to integrate hardware back button into ionic4 navigation

这在GitHub，Ionic Forums和Twitter中被跟踪
在正式修复之前，您可以使用以下解决方法：

this.platform.backButton.subscribe(() => {
  // code that is executed when the user pressed the back button
})

// To prevent interference with ionic's own backbutton handling
// you can subscribe with a low priority instead
this.platform.backButton.subscribeWithPriority(0, () => {
  // code that is executed when the user pressed the back button
  // and ionic doesn't already know what to do (close modals etc...)
})

^{请注意，您需要保存subscribe(...)的结果
如果您想再次取消订阅。}

旧答案：（截止至2018年4月）

registerBackButtonAction是just a wrapper的corresponding Cordova call。

因此，您可以将旧电话打到registerBackButtonAction：

this.platform.registerBackButtonAction(() => { 
  // code that is executed when the user pressed the back button
});

并替换为：

this.platform.ready().then(() => {
  document.addEventListener("backbutton", () => { 
    // code that is executed when the user pressed the back button
  });
});

Answer 2

我尝试过

<form @submit.prevent="editMode ? queryMode ? updateParticipant() : anotherMethod() : addParticipant()">

有效！

ionic git commit https://github.com/ionic-team/ionic/commit/978cc39009a9a0fb065540ce17e10c685b6c101a

Answer 3

对于@ ionic / vue，您可以将其（或类似的东西）放在main.js中

import { Plugins } from '@capacitor/core'

Plugins.App.addListener('backButton', function() {
  console.log(111);
  window.history.back();
});

不，不，console.log(111);没错，它是解决方案的一部分：）

平台4的Ionic 4替代品

3 个答案: