如何设置在JavaScript函数内的值到全局变量/角？ [英] How to set a value to a global variable inside a function in javascript/angular?

问题描述

好吧，我需要使用不同的角度控制器或任何功能，我可以做一个变量，但是在这种特殊情况下我碰到一个服务或函数的变量之一的值，你想怎么称呼它，这是code

Well, I need to use a variable in different angular controllers or any function, which I can do, but in this particular case I'm getting the value of one of those variables from a service or a function, how you want to call it, this is the code

//global variable userdata
userdata = {};

ng.tcts.service('$user', function($http, $q, $window, $boots){
return{

    login: function(data){
        var deferred = $q.defer();

        $http({
            method:'POST',
            url:ng.api+'/log/in',
            data:{
                    data:data
                },
            headers:{'Content-type':'application/x-www-form-urlencoded'}        
        }).success(function(response, status, headers, config){
            if(response.success){
                console.log(response);
                //userdata assignation
                userdata = response.data;  
                deferred.resolve([response.respnum, response.success, response.report, response.data]);
            }
            else{
                deferred.resolve([response.respnum, response.success, response.report, response.data]);
            }
        }).error(function(response, status, headers, config){
            deferred.reject([response.respnum, response.success, response.report]);
        });
        return deferred.promise;        
    }

);

正如你可以看到我asigining用户数据的成功函数内部response.data的价值，当我使用它的功能环境它的工作原理，在分配工作正常，但是当我尝试使用它之外呢，对象是空的，我希望你能帮助我，THX

As you can see I'm asigining userdata the value of response.data inside the success function , when I use it in the function environment it works , the assignation works fine, but when I try to use it outside of it, the object is empty, I hope you can help me with this, thx

推荐答案

所有你需要做的是使该得到一个服务，并设置用户数据和数据保持在服务中。然后，你作出这样的返回数据的方法，你可以把它注射到你的应用程序的任何控制器。

all you need to do is make a service that gets and set the user data and the data is kept inside the service. Then you make a method that returns that data and you can inject it into any controller in your app.

app.service('userData',function(){
var data;

this.get = function() {
    // do your ajax call to get your user data and in the response data = response;
}

this.data = function() {
    return data;
}
});

在任意一个控制器：

then in any controller:

function myCtrl($scope,userData) {
    // you can access it with this userData.data();

    // or set it to a $scope var

    $scope.userData = userData.data();
}

制作一个全局变量是不是您如何使用角度，您可以创建一个服务，你再注入到你的控制器，因此多个地方可以跟这些数据，也可以将其设置为$ rootScope变种，然后在任何引用它控制器。从不创建一个全局变量，并在控制器中引用它虽然。这是你如何最终在角内存泄漏。

Making a global variable isn't how you use Angular you can create a service that you then inject into your controllers so multiple places can talk to that data or you can set it to a $rootScope var and then reference it in any controller. NEVER create a global variable and reference it in your controller though. This is how you end up with memory leaks in Angular.

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