ionic-framework - ionic 取消硬返回按钮覆盖

Question

有关于在 Ionic 中覆盖物理 Android BACK 按钮以提供自定义行为的问题:

Ionic override all BACK button behaviour for specific controller

Ionic: How to override back button function?

但是你怎么做 取消覆盖 恢复默认行为？

我尝试更改处理程序的优先级，希望默认处理程序可能具有更高的优先级。

var customBackButton = function() {
    console.log("this is custom behaviour");
};
$ionicPlatform.registerBackButtonAction(
    customBackButton, 101
);
$scope.$on('$destroy', function() {
    $ionicPlatform.registerBackButtonAction(
        customBackButton, 0
    );
});

这不起作用。

Answer 1

Ionic v1 解决方案(过时)

根据Ionic docs for $ionicPlatform , registerBackButtonAction()返回:

A function that, when called, will deregister this backButtonAction.

这可以在 registerBackButtonAction() 的代码中看到。 :

  // return a function to de-register this back button action
  return function() {
    delete self.    [action.id];
  };

因此，注销/取消自定义行为的正确方法是在 Controller 销毁时调用该函数:

var customBackButton = function() {
    console.log("this is custom behaviour");
};

// registerBackButtonAction() returns a function which can be used to deregister it
var deregisterBackButtonAction = $ionicPlatform.registerBackButtonAction(
    customBackButton, 101
);

$scope.$on('$destroy', function() {
    deregisterBackButtonAction();
});

一个更完整的例子展示了如何覆盖和恢复硬按钮和软按钮可以在这里找到:

Ionic override all BACK button behaviour for specific controller