绑定在组件之间不起作用 AngularJS

Question

我确实在 AngularJS 中遇到绑定问题。我创建了 2 个组件（leftForm 和 rightForm），这些组件有一个输入和一个 p 元素。这个p元素是一个计数，当你点击其他组件的输入按钮时它会增加。

例如我点击左按钮（左组件）然后右按钮（右组件）中的计数需要递增，我已经完成了这个，但问题是我看不到那些变量在视图中，所以我猜我在绑定方面做错了什么。这是我的代码：

angular.module('testApp', [])
    .controller('Controller', function ($rootScope) {
        var vm = this;
        $rootScope.valueLeft = 0;
        $rootScope.valueRight = 0;

        vm.rightButton = function () {
            $rootScope.valueLeft += 1;
        }

        vm.leftButton = function () {
            $rootScope.valueRight += 1;
        }

    })

    .component('leftForm', {
        templateUrl: 'leftForm.html',
        controller: 'Controller',
        controllerAs: 'vm',
        bindings: {
            onUpdate: '&'
        }
    })

    .component('rightForm', {
        templateUrl: 'rightForm.html',
        controller: 'Controller',
        controllerAs: 'vm',
        bindings: {
            onUpdate: '&'
        }
    });

<!doctype html>
<html ng-app="testApp">
<head>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.1/angular.min.js"></script>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
          crossorigin="anonymous">
</head>

<body>
<div ng-controller="Controller as vm">
    <div class="container" style="text-align: center; padding-top: 2%;">
        <div class="row" style="padding: 2%; border: 1px solid;">
            <div class="col">
                <left-form></left-form>
            </div>
            <div class="col"></div>
            <div class="col">
                <right-form></right-form>
            </div>
        </div>
    </div>
</div>
</body>

<script type="text/ng-template" id="leftForm.html">
    <p>{{$rootScope.valueLeft}}</p>
    <button ng-click="vm.leftButton()">+1</button>
</script>

<script type="text/ng-template" id="rightForm.html">
    <p>{{$rootScope.valueRight}}</p>
    <button ng-click="vm.rightButton()">+1</button>
</script>

</html>

Answer 1

要访问模板中的 $rootScope 变量，您只需 use $root as a reference to the $rootScope 作为 {{$root.valueLeft}} 和 {{$root.valueRight}}。这是一个工作示例：

angular.module('testApp', [])
    .controller('Controller', function ($rootScope) {
        var vm = this;
        $rootScope.valueLeft = 0;
        $rootScope.valueRight = 0;

        vm.rightButton = function () {
            $rootScope.valueLeft += 1;
        }

        vm.leftButton = function () {
            $rootScope.valueRight += 1;
        }

    })

    .component('leftForm', {
        templateUrl: 'leftForm.html',
        controller: 'Controller',
        controllerAs: 'vm',
        bindings: {
            onUpdate: '&'
        }
    })

    .component('rightForm', {
        templateUrl: 'rightForm.html',
        controller: 'Controller',
        controllerAs: 'vm',
        bindings: {
            onUpdate: '&'
        }
    });

<html ng-app="testApp">
<head>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.1/angular.min.js"></script>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"
          crossorigin="anonymous">
</head>

<body>
<div ng-controller="Controller as vm">
    <div class="container" style="text-align: center; padding-top: 2%;">
        <div class="row" style="padding: 2%; border: 1px solid;">
            <div class="col">
                <left-form></left-form>
            </div>
            <div class="col"></div>
            <div class="col">
                <right-form></right-form>
            </div>
        </div>
    </div>
</div>
</body>

<script type="text/ng-template" id="leftForm.html">
    <p>{{$root.valueLeft}}</p>
    <button ng-click="vm.leftButton()">+1</button>
</script>

<script type="text/ng-template" id="rightForm.html">
    <p>{{$root.valueRight}}</p>
    <button ng-click="vm.rightButton()">+1</button>
</script>

</html>

绑定在组件之间不起作用 AngularJS

Binding not working between components AngularJS

javascript

angularjs

rootscope