$ http.get和控制器之间的角度共享变量 [英] Angular Share Variable betwen $http.get and controller

问题描述

我无法将$http.get()内部的一个变量的内容传递给此方法的外部...它始终是undefined.

I can't pass the content of one variable inside $http.get() to outside of this method... it's always undefined.

我在$rootScope上进行了测试，但是没有用.

I tested with $rootScope, but it didn't work.

controller('myControl', function ($scope, $http) {
    var content;

    $http.get('../Json/data.json').success(function (data, content) {
        content = data;
    }).error(function (data, status, headers, config) {
        $scope.dataJson = "ERROR";
    });

    console.log(content); 
});

推荐答案

这里有两个问题:

• 成功处理程序中的content参数是 shadowing 控制器中的content变量.
• 您正在尝试将content写入控制台，直到它具有一个值.这将不起作用，因为$http.get()是异步的.

• The content parameter in your success handler is shadowing the content variable in your controller.
• You are trying to write content to the console before it has a value. This will not work because $http.get() is asynchronous.

要解决这些问题:

• 删除content参数.它没有任何目的.
• 在success回调中使用content变量 .

• Remove the content parameter. It serves no purpose.
• Use the content variable inside your success callback.

controller('myControl', function ($scope, $http) {
    var content;

    $http.get('../Json/data.json').success(function (data) {
        content = data;

        console.log(content);
        $scope.dataJson = content;
    }).error(function (data, status, headers, config) {
        $scope.dataJson = "ERROR";
    });
});

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