android - 覆盖android硬件后退按钮，使其在一页退出并在下一页返回

Question

我正在使用以下 Controller ，以便在 dashboard 页面中，android 后退按钮退出应用程序，但在其余页面上它会返回。因为在 dashboard 页面之前我有一个教程我只向我的用户展示一次，然后我不得不覆盖 android 后退按钮以便在 dashboard 如果按下它会退出，它可以正常使用此代码:

angular

  .module('az-app')
  .controller('DashboardController', function ($scope, $state, $ionicPlatform) {

    /**
     * While user on dashboard.html we don't want Android back button to return
     * to tutorial views so we override it so that in case that back button is pressed
     * to exit app which is in accordance with android lifecycle.
     *
     */
    $ionicPlatform.registerBackButtonAction(function () {
       if($state.is('/dashboard') || $state.is('dashboard')){
        navigator.app.exitApp();

       }
    }, 100);


  });

现在的问题是，当我转到以下 View 时，它仍然用作退出按钮，但我希​​望它只是任何其他不是仪表板的 View 中的后退按钮，所以我在下面尝试了这个 Controller :

angular

  .module('az-app')
  .controller('DirMedicoController', function ($scope, $state, $ionicPlatform) {

    $ionicPlatform.registerBackButtonAction(function () {

      navigator.app.backHistory();

    }, 100);

  });

所以现在它返回了功能，但是当我在 dashboard 时，如果我从过去的 Controller 按下返回，它会覆盖它的功能，现在它不会退出回来。

更新

感谢 mudasser ajaz 在下面的回答，我终于可以让它工作了答案是:

angular

  .module('az-app')
  .controller('DashboardController', function ($scope, $state, $ionicPlatform, $location, $ionicHistory) {

    /**
     * While user on dashboard.html we don't want Android back button to return
     * to tutorial views so we override it so that in case that back button is pressed
     * to exit app which is in accordance with android lifecycle.
     *
     * Else if not on dashboard just work as normal back button
     *
     */
    $ionicPlatform.registerBackButtonAction(function() {
      if ($location.path() === "/dashboard") {
        navigator.app.exitApp();
      }
      else {
        $ionicHistory.goBack();
      }
    }, 100);


    $scope.backToPolicy = function () {
      $state.go('intro');
    }

    $scope.showDirMedico = function () {
      $state.go('dirmedico');
    }

  });

Answer 1

在您的仪表板 Controller 中执行此操作

$ionicPlatform.registerBackButtonAction(function() {
//var path = $location.path()
  if ($location.path() === "/dashboard" || $location.path() === "dashboard") {
    navigator.app.exitApp();
  }
  else {
    $ionicHistory.goBack();
    //navigator.app.goBack();
  }
}, 100);

并添加 $location 和 $ionicHistory 作为依赖

.controller('DashboardController', function ($scope, $state, $ionicPlatform, $location, $ionicHistory) {

从其他 Controller 中删除 registerBackButtonAction。