Angular 控制器和指令将值从控制器获取到指令中
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【中文标题】Angular 控制器和指令将值从控制器获取到指令中【英文标题】：Angular controllers and directives getting values from controller into directive 【发布时间】：2017-06-05 23:01:29 【问题描述】：我在我的 Angular 网站中有一个构建页眉的指令，在该页眉中我想显示用户的名字和姓氏。我将整个应用程序包装在 MainController 中。我渲染的 html 看起来像这样，
<html ng-app="app" ng-controller="MainController as main" class="fa-events-icons-failed ng-scope">
<head>
<style type="text/css">@charset "UTF-8";[ng\:cloak],[ng-cloak],[data-ng-cloak],[x-ng-cloak],.ng-cloak,.x-ng-cloak,.ng-hide:not(.ng-hide-animate)display:none !important;ng\:formdisplay:block;.ng-animate-shimvisibility:hidden;.ng-anchorposition:absolute;</style>
<meta charset="utf-8">
<title ng-bind="main.windowTitle" class="ng-binding">App School Management</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="dist/css/generic.css">
<link rel="stylesheet" type="text/css" href="dist/css/styles.min.css">
<script src="https://use.fontawesome.com/2a6c262d81.js"></script><script src="https://cdn.fontawesome.com:443/js/stats.js"></script>
<link rel="stylesheet" href="https://use.fontawesome.com/2a6c262d81.css" media="all">
</head>
<body cz-shortcut-listen="true">
<div id="page-wrapper">
<div id="page-header" class="bg-gradient-9 ng-isolate-scope" header="" user="userModel">
<div id="mobile-navigation">
<button id="nav-toggle" class="collapsed" data-toggle="collapse" data-target="#page-sidebar"><span></span></button>
<a href="index.html" class="logo-content-small" title="MonarchUI"></a>
</div>
<div id="header-logo" class="logo-bg">
<a ui-sref="dashboard.home" class="branding" title="Schoozle">
App Logo
</a>
<a id="close-sidebar" href="#" title="Close sidebar">
<i class="fa fa-chevron-left" aria-hidden="true"></i>
</a>
</div>
<div id="header-nav-left">
<div class="user-account-btn dropdown">
<a href="#" title="My Account" class="user-profile clearfix" data-toggle="dropdown">
<img src="http://placehold.it/40x40" >
<span ng-bind="$scope.user.first_name" class="ng-binding"></span>
<i class="fa fa-chevron-down" aria-hidden="true"></i>
</a>
</div>
</div>
<!-- #header-nav-left -->
<div id="header-nav-right">
<div class="dropdown" id="notifications-btn">
<a data-toggle="dropdown" href="#" title="">
<span class="small-badge bg-yellow"></span>
<i class="fa fa-bell" aria-hidden="true"></i>
</a>
<div class="dropdown-menu box-md float-right">
<!-- Notifications Dropdown -->
</div>
</div>
</div>
</div>
我的非指令 HTML 看起来像这样，
<div header user="userModel"></div>
我的控制器代码和指令代码看起来像这样，
app.directive('header', [function ()
return
restrict: 'A', //This menas that it will be used as an attribute and NOT as an element. I don't like creating custom HTML elements
replace: true,
scope: user: '=', // This is one of the cool things :). Will be explained in post.
templateUrl: "/templates/partials/header.html",
controller: ['$scope', '$filter', function ($scope, $filter)
// Your behaviour goes here :)
]
]);
app.controller('MainController', ['$scope', 'UserService', function($scope, UserService)
var self = this;
this.windowTitle = "App School Management";
this.loading = true;
this.user = ;
UserService.authenticatedUser()
.then(function(response)
self.loading = false;
self.userModel = response.message;
, function(error)
self.hasError = true;
self.errors = error.message;
);
]);
如何将我的用户对象从控制器中获取到指令中？
【问题讨论】：
【参考方案1】：由于您使用的是MainController as main，请将 main 添加到您的指令中：
<div header user="main.userModel"></div>
用户数据将通过您的“templates/partials/header.html”内的隔离范围两种方式绑定为user 对象提供，例如user.firstName 和user.lastName。
您可以通过添加指令定义来避免使用$scope
controllerAs: 'ctrl';
bindToController: true;
您的用户数据将以ctrl.user 对象的形式在 HTML 中可用
【讨论】：
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