离子框架ionicView.entered事件被触发两次

Question

我正在玩这个在视图变为活动状态时触发的ionicView事件,并且我正在使用您可以在创建项目时重复使用的侧边菜单模板.似乎如果我在AppCtrl中放置一个$ ionicView.entered事件的监听器(侧面菜单模板使用的那个,它属于ui-router配置中的抽象状态),它会连续两次调用子视图(例如,当使用app.someotherview作为状态时).

我不知道这是否是预期的行为,因为无论我是否更改子视图(menuContent视图),我都希望它只会触发一次.

我想知道这是否是预期的行为,如果是这样的话,我怎样才能在每次显示侧面菜单模板时触发一次事件.

这就是我写的:

这是来自应用程序模块:

.config(function($stateProvider, $urlRouterProvider, $httpProvider) {
  $stateProvider

  .state('app', {
    url: "/app",
    abstract: true,
    templateUrl: "templates/menu.html",
    controller: 'AppCtrl'
  })

  .state('app.overview', {
    url: "/overview",
    views: {
      'menuContent': {
        templateUrl: "templates/overview.html",
        controller: 'OverviewCtrl'
      }
    }
  })

  .state('login', {
    url: "/login",
    templateUrl: "templates/identificationscreen.html",
    controller: "IdentificationCtrl"
  })

  .state('app.agenda', {
    url: "/agenda",
    views: {
      'menuContent': {
        templateUrl: "templates/agenda.html",
        controller: 'AgendaCtrl'
      }
    }
  });

  $httpProvider.interceptors.push('credentialsInjector');

  // if none of the above states are matched, use this as the fallback
  $urlRouterProvider.otherwise('/login'); 

然后AppCtrl是这样的:

angular.module('dashboard.controllers.app', [])
.controller('AppCtrl', function($scope, $ionicModal, $timeout, $ionicSideMenuDelegate, authService, $state) {
    $scope.logout = function() {
        authService.logout();
        $state.go('login');
    };

    $scope.$on('$ionicView.enter', function(){ //This is fired twice in a row
        console.log("App view (menu) entered.");
        console.log(arguments); 
    });

    $scope.$on('$ionicView.leave', function(){ //This just one when leaving, which happens when I logout
        console.log("App view (menu) leaved.");
        console.log(arguments);
    });
}); 

菜单模板:

<ion-side-menus enable-menu-with-back-views="false">
  <ion-side-menu-content edge-drag-threshold="true">
    <ion-nav-bar class="bar-stable">
      <ion-nav-back-button>
      </ion-nav-back-button>
      <ion-nav-buttons side="left">
        <button class="button button-icon button-clear ion-navicon" menu-toggle="left">
        </button>
      </ion-nav-buttons>
    </ion-nav-bar>
    <ion-nav-view name="menuContent"></ion-nav-view>
  </ion-side-menu-content>

  <ion-side-menu side="left">
    <ion-header-bar class="bar-stable">
      <h1 class="title">APPoint!</h1>
    </ion-header-bar>
    <ion-content>
      <ion-list>
        <ion-item nav-clear menu-close href="#/app/overview">
          Overview
        </ion-item>
        <ion-item nav-clear menu-close href="#/app/agenda">
          Agenda
        </ion-item>
        <ion-item nav-clear menu-close ng-click="logout()">
          Logout
        </ion-item>
      </ion-list>
    </ion-content>
  </ion-side-menu>
</ion-side-menus>

Answer 1

一个简单的解决方法是:

$scope.$on('$ionicView.enter', function(ev) {
    if(ev.targetScope !== $scope)
        return;
    // Your code which should only run once
});

Answer 2

尝试$ionicView.afterEnter。那对我来说只触发一次。 网址