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angular.js - 如何使用AngularJS隔离作用域中的'&'?
怪我咯
怪我咯 2017-05-15 16:50:53
0
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‘@’和'='倒是好理解，有没有一个必须使用'&'的场景?

<body ng-app="myApp" ng-init="content='abc'">
<p ng-controller="myController" >
    <input type="text" ng-model="content" />
    <p my-directive my-title="title" my-content="content" ></p>
</p>
</body>
<script type="text/javascript">
var myApp = angular.module('myApp', [])
.directive('myDirective', function($rootScope) {
    return {
        priority:1000,
        restrict: 'A',
        replace: true,
        scope: {
            myTitle:'@',
            myContent: '='
        },
        template: '<p><h2>{{myTitle}}</h2><p>from myDirective:{{myContent}}</p></p>'
    };
})  
.controller('myController',function($scope){
    $scope.content = 'from controller';
});
</script>

希望可以提供一个demo。

怪我咯
怪我咯

走同样的路，发现不同的人生

reply all(1)
phpcn_u1582
phpcn_u15822017-05-15 16:52:53 1 floor

Usage of

&: Pass a function from the parent scope to be called later

When to use it: When we need to call a controller method in a directive, we usually pass some parameters in the directive to the controller method

Actual case: For example, in a tree-structured directive, after we select a node, we need to perform further operations on this node in the controller, such as fetching data from the server based on the selected node. So in the directive, we need to pass the selected node to the controller.

Demo

Demo code: 

javascriptangular.module('docsIsoFnBindExample', [])
.controller('Controller', ['$scope', '$timeout', function($scope, $timeout) {
  $scope.name = 'Tobias';
  $scope.message = '';
  $scope.hideDialog = function (message) {
    $scope.message = message;
    $scope.dialogIsHidden = true;
    $timeout(function () {
      $scope.message = '';
      $scope.dialogIsHidden = false;
    }, 2000);
  };
}])
.directive('myDialog', function() {
  return {
    restrict: 'E',
    transclude: true,
    scope: {
      'close': '&onClose'
    },
    templateUrl: 'my-dialog-close.html'
  };
});

html<p ng-controller="Controller">
  {{message}}
  <my-dialog ng-hide="dialogIsHidden" on-close="hideDialog(message)">
    Check out the contents, {{name}}!
  </my-dialog>
</p>



my-dialog-close.html:

<p class="alert">
  <a href class="close" ng-click="close()">&times;</a>
  <p ng-transclude></p>
</p>
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