1. 我的问题:
   如题: angular中ng-init中定义值在控制器里面获取不到值

2. 相关代码:

<p class="container" ng-app="app" ng-controller="ctrl" ng-init="demo='风一样的男子'">
    <h1>ng-init</h1>
    <input ng-model="demo" type="text">
    demo = {{demo}}

    <button type="button" ng-click="demoClick()">button</button>
</p>

(function(angular) {
    'use strict';
    var app = angular.module('app', []).controller('ctrl', ctrl);

    function ctrl ($scope, $http) {
        console.log('直接获取: ' + $scope.demo); // undefined

        $http.post('/demo', {
            direction: $scope.demo // undefined
        });

        $scope.demoClick = function () {
            console.log('click: ' + $scope.demo); // 风一样的男子

            $http.post('/demo', {
            direction: $scope.demo // 风一样的男子
        });
        };
    }
}(angular));

WHY?