1.作用域
基于作用域的事件传播
作用域可以像DOM节点一样，进行事件的传播。主要是有两个方法：
broadcasted：从父级作用域广播至子级 scopeemitted：从子级作用域往上发射到父级作用域
<!doctype html> <html ng-app> <head> <script src="http://code.angularjs.org/1.2.25/angular.min.js"></script> </head> <body> <div ng-controller="EventController"> Root作用域<tt>MyEvent</tt> count:{{count}} <ul> <li ng-repeat="i in [1]" ng-controller="EventController"> <button ng-click="$emit('MyEvent')">$emit('MyEvent')</button> <button ng-click="$broadcast('MyEvent')">$broadcast('MyEvent')</button> <br> Middle作用域<tt>MyEvent</tt> count: {{count}} <ul> <li ng-repeat="item in [1, 2]" ng-controller="EventController"> Leaf作用域<tt>MyEvent</tt> count: {{count}} </li> </ul> </li> </ul> </div> <script type="text/javascript"> function EventController($scope) { $scope.count = 0; $scope.$on('MyEvent', function() { $scope.count++; }); } </script> </body> </html>