如果要使用隔离作用域，则可以使用
=来自控制器作用域的变量的双向绑定来传递控制对象。您还可以在页面上使用相同的控件对象来控制同一指令的多个实例。
angular.module('directiveControlDemo', []).controller('MainCtrl', function($scope) { $scope.focusinControl = {};}).directive('focusin', function factory() { return { restrict: 'E', replace: true, template: '<div>A:{{internalControl}}</div>', scope: { control: '=' }, link: function(scope, element, attrs) { scope.internalControl = scope.control || {}; scope.internalControl.takenTablets = 0; scope.internalControl.takeTablet = function() { scope.internalControl.takenTablets += 1; } } };});<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script><div ng-app="directiveControlDemo"> <div ng-controller="MainCtrl"> <button ng-click="focusinControl.takeTablet()">Call directive function</button> <p> <b>In controller scope:</b> {{focusinControl}} </p> <p> <b>In directive scope:</b> <focusin control="focusinControl"></focusin> </p> <p> <b>Without control object:</b> <focusin></focusin> </p> </div></div>
