ionic - angularjs Transfer data between pages

Question

My English is very bad,at first Controller,I post data form The server,and i got a $rootScope.YD for Transfer data .but when i use the YD in the second page,it does't work.can you help me ?

.controller('yd_homeCtrl',function($rootScope, $scope, $state, $http,$ionicActionSheet, $ionicModal)
{
    $scope.getReadList = function ()
    {
        var url = $rootScope.rootUrl + "/read.php";
        var data = {
            "func":"getReadList",
            "unionid":$rootScope.userinfo.unionid,
            "fr":1
        };
        encode(data);

        $rootScope.LoadingShow;

        $http.post(url, data).success(function (response)
        {
            $rootScope.LoadingHide();
            $rootScope.YD=response.data.result[0];
            $state.go('yd_improve')
        }).error(function (response, status)
        {
            $rootScope.LoadingHide();
            $rootScope.Alert('连接失败！[' + response + status + ']');
            return;
        });
    }
})

.controller("yd_improveCtrl",function($rootScope, $scope, $state, $http, $ionicActionSheet, $ionicModal, $stateParams, $interval, $sce, $ionicHistory,$ionicSlideBoxDelegate)
    {
    $scope.text="";
    angular.forEach($rootScope.YD,function(value,key){
        if(key==0)
        {
        //alert(1111111);
        //alert(value.text);
            $scope.text=value.text;
            alert($scope.text);
        }

    });

   });

there is app.js state:

 .state('yd_improve', {
    cache: false,
    url: '/yd_improve/:id',
    onExit: function ()
    {
        var v = document.getElementById("audio");
        v.pause();
        v.src = "";
    },
    templateUrl: 'templates/yd_improve.html',
    controller: 'yd_improveCtrl'
})

Answer 1

Use $broadcast service. It's the most reliable solution for broadcasting events and passing parameters between controllers.

Don't rely on storing data in service because on page refresh, service also gets refreshed and you will lose the data stored in service's variable. So maintaining state in service is highly unrecommended. Use $broadcast instead.