UI-Router ng-class ="$ state.includes('name')"不在指令中工作

Question

我想使用ui-router的abilitie来测试ng-class中的活动状态

如果我尝试这个它不起作用:

navTest.$inject = ["$compile", "$navbar", "$state"];
function navTest($compile, $navbar, $state) {
    var defaults = $navbar.defaults;

    var navTest = {
        restrict: 'E',
        template: '<nav class="navbar navbar-default" role="navigation">' +
            '<div class="container-fluid">' +
                '<div class="navbar-header">' +
                    '<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">' +
                        '<span class="sr-only">Toggle navigation</span>' +
                        '<span class="icon-bar"></span>' +
                        '<span class="icon-bar"></span>' +
                        '<span class="icon-bar"></span>' +
                    '</button>' +
                    '<a class="navbar-brand" href="#">Brand</a>' +
                '</div>' +
                '<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">' +
                    '<ul class="nav navbar-nav">' +
                        '<li data-ng-class="{active: $state.includes(\'user\')}"><a data-ui-sref="user.List">Link 1</a></li>' +
                        '<li data-ng-class="{active: $state.includes(\'technology\')}"><a data-ui-sref="technology.List">Link 2</a></li>' +
                    '</ul>' +
                '</div>' +
            '</div>' +
        '</nav>',   
        replace: true
    };
    return navTest; 
}    

现在,如果我添加一个函数来测试(链接)函数(指令)中的活动状态,我替换:data-ng-class ="{active:$ state.includes(\'technology \')}"by data-ng-class ="{active:isActiveState(\'technology \')}"

link : function (scope, elem, attrs) {
    scope.isActiveState = function (name) {                 
        return $state.includes(name);
    };
}

一切正常,但我不明白为什么因为功能完全相同的东西？

Answer 1

这是范围的事情,但你不想使用$rootScope; 在您的link函数中添加以下内容应该足够了:

scope.$state = $state;