ionic 页面加载事件及loading动画

页面加载完成事件（非刷新情况下，页面切换是不会重复触发此事件的，只在第一次进入页面时触发，需要重复触发的话请使用 $ionicView.enter 事件）

angular.module('app.controllers', [])
.controller('page6Ctrl', ['$scope', '$http', '$stateParams', '$ionicLoading',
    // The following is the constructor function for this page's controller. See https://docs.angularjs.org/guide/controller
    // You can include any angular dependencies as parameters for this function
    // TIP: Access Route Parameters for your page via $stateParams.parameterName
    function($scope, $http, $stateParams, $ionicLoading) {
        $scope.$on('$ionicView.loaded', function(event, data) {
            $ionicLoading.show();

            $http.get("js/123.json")
                .success(function(res) {
                    $ionicLoading.hide();
                });
        });
    }
])

其他事件如下：

$ionicView.loaded	The view has loaded. This event only happens once per view being created and added to the DOM. If a view leaves but is cached, then this event will not fire again on a subsequent viewing. The loaded event is good place to put your setup code for the view; however, it is not the recommended event to listen to when a view becomes active.
$ionicView.enter	The view has fully entered and is now the active view. This event will fire, whether it was the first load or a cached view.
$ionicView.leave	The view has finished leaving and is no longer the active view. This event will fire, whether it is cached or destroyed.
$ionicView.beforeEnter	The view is about to enter and become the active view.
$ionicView.beforeLeave	The view is about to leave and no longer be the active view.
$ionicView.afterEnter	The view has fully entered and is now the active view.
$ionicView.afterLeave	The view has finished leaving and is no longer the active view.
$ionicView.unloaded	The view's controller has been destroyed and its element has been removed from the DOM.
$ionicParentView.enter	The parent view has fully entered and is now the active view. This event will fire, whether it was the first load or a cached view.
$ionicParentView.leave	The parent view has finished leaving and is no longer the active view. This event will fire, whether it is cached or destroyed.
$ionicParentView.beforeEnter	The parent view is about to enter and become the active view.
$ionicParentView.beforeLeave	The parent view is about to leave and no longer be the active view.
$ionicParentView.afterEnter	The parent view has fully entered and is now the active view.
$ionicParentView.afterLeave	The parent view has finished leaving and is no longer the active view.

官方文档：http://ionicframework.com/docs/api/directive/ionView/

关于$http和$ionicLoading对象，要在控制器使用ionic系统对象的时候，只需要在第二参数里加入变量，然后在最后的函数参数里也加入参数就可以了