AngularJS : How to change scope value from isolated scope within directive

Question

如何更改指令的范围值？我已经尝试过这种方式:

在模板中:

<h1>{{abcd}}</h1>
<example-directive abcd="abcd"></example-directive>

在指令中

..
scope: {
   abcd: '='
},
link: function($scope){
   $scope.abcd = "change it pleeease";
}
....

但结果我什么也没得到。所以“h1”标签是空的......有人知道为什么吗？

update1 - 我的完整代码

指令:

(function(){
'use strict';

var standingsDirective = function(api, $http){
    return {
        restrict: 'E',
        scope : {
            sid: '=',
            loadingstatus: '='
        },
        templateUrl: "teams/views/standings.html",
        link: function(scope){
            scope.loadingstatus = "loading";

            $http.get(api+'/getsomething'+scope.id).success(function(result){
                scope.data =  result;

                if(scope.data && scope.data.length > 0){
                    scope.loadingstatus = "loaded";
                }else{
                    scope.loadingstatus = "notloaded";
                }
            }).error(function(){
                scope.loadingstatus = "notloaded";
            });
        }
    };
};

var teamsModule = angular.module('app.teams');
teamsModule.directive('standings', ['api', '$http', standingsDirective]);

}());

模板文件:

...
<a ng-show="loadingstatus == 'loaded'" ng-click="subview='standing'" class="activeLink">standings - {{loadingstatus}}</a>
...
<standings sid="sid" loadingstatus="loadingstatus" ng-show="subview=='standing'"></standings>
...

Answer 1

回答我的问题:

首先，非常感谢“Fedaykin”帮助我提出评论。他是那个指出它应该有效的人，因此问题应该出在我代码的另一部分。

发现 ng-if 属性阻止了我的指令的执行。html 代码如下所示:

<a ng-show="loadingstatus == 'loaded'" ng-click="subview='standing'" class="activeLink">standings - {{loadingstatus}}</a>
<div ng-if="subview=='standing'">
    ...
    <standings sid="sid" loadingstatus="loadingstatus" ng-show=" subview=='standing'">    </standings>
    ....
</div>

所以这导致了这种奇怪的行为。我希望这篇文章能够帮助其他有类似问题的人解决问题。