我建议您通过辅助指令的require属性利用指令之间的通信。第一个指令（e指令）保存隔离的作用域，而第二个辅助指令（a指令）具有对第一个指令的引用，并通过在第一个指令上定义的函数设置属性。一个小例子是（请参阅punker）：
<!DOCTYPE html><html ng-app="plunker"> <head> <meta charset="utf-8" /> <title>AngularJS Plunker</title> <script>document.write('<base href="' + document.location + '" />');</script> <link rel="stylesheet" href="style.css" /> <script data-require="angular.js@1.2.x" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.16/angular.min.js" data-semver="1.2.16"></script> <script src="app.js"></script> </head> <body ng-controller="MainCtrl"> <div e-directive config="parentConfig" a-directive></div> </body></html>和javascript：
var app = angular.module('plunker', []);app.controller('MainCtrl', function($scope) { $scope.parentConfig = {};});app.controller('ECtrl', function ( $scope ) { this.setProp = function(newProp){$scope.config.prop = newProp;}; $scope.$watch('config', function(newProp, oldProp) { console.log(oldProp, newProp); });});app.directive('eDirective', function() { return { restrict: 'A', scope: { config: '=' }, controller: 'ECtrl', link: function(scope, element, attrs) { scope.config.prop ="abc"; } };});app.directive('aDirective', function() { return { restrict: 'A', require: 'eDirective', link: function(scope, element, attrs,ctrl) { ctrl.setProp("def"); } };});
