AngularJS全局scope与Isolatescope通信用法示例

<div ng-controller="MyCtrl">
 <button ng-click="show=true">show</button>
 <dialog title="Hello }"
 visible="}"
 on-cancel="show=false;"
 on-ok="show=false;parentScope();">
 <!--上面的on-cancel、on-ok，是在directive的isoloate scope中通过&引用的。
 如果表达式中包含函数，那么需要将函数绑定在parent scope（当前是MyCtrl的scope）中-->
 Body goes here: username:} , title:}.
 <ul>
 <!--这里还可以这么玩~names是parent scope的-->
 <li ng-repeat="name in names">}</li>
 </ul>
 <div>
 Email:<input type="text" ng-model="email" style="width: 200px;height:20px"/>
 </div>
 <div>
 Count:<input type="text" ng-model="person.Count" style="width: 120px;height:20px"/>
 <button ng-click="changeCount()">Count加1</button>
 </div>
 <p></p>
 </dialog>
</div>

var app = angular.module("Dialog", []);
app.controller("MyCtrl", function ($scope) {
 $scope.person = {
 Count: 0
 };
 $scope.email = 'carl@126.com';
 $scope.names = ["name1", "name2", "name3"];
 $scope.show = false;
 $scope.username = "carl";
 $scope.title = "parent title";
 $scope.parentScope = function () {
 alert("scope里面通过&定义的东东，是在父scope中定义");
 };
 $scope.changeCount = function () {
 $scope.person.Count = $scope.person.Count + 1;
 }
 // 监听controller count变更, 并发出事件广播,再directive 中 监听count CountStatusChange变更事件
 $scope.$watch('person.Count', function (newVal, oldVal) {
 console.log('>>>parent Count change:' + $scope.person.Count);
 if (newVal != oldVal) {
 console.log('>>>parent $broadcast count change');
 $scope.$broadcast('CountStatusChange', {"val": newVal})
 }
 });
});
app.directive('dialog', function factory() {
 return {
 priority: 100,
 template: ['<div ng-show="visible">',
 ' <h3>}</h3>',
 ' <div class="body" ng-transclude></div>',
 ' <div class="footer">',
 ' <button ng-click="onOk()">OK</button>',
 ' <button ng-click="onCancel()">Close</button>',
 ' </div>',
 '</div>'].join(""),
 replace: false,
 transclude: true,
 restrict: 'E',
 scope: {
 title: "@",//引用dialog标签title属性的值
 visible: "@",//引用dialog标签visible属性的值
 onOk: "&",//以wrapper function形式引用dialog标签的on-ok属性的内容
 onCancel: "&"//以wrapper function形式引用dialog标签的on-cancel属性的内容
 },
 controller: ['$scope', '$attrs', function ($scope, $attrs) {
 // directive scope title 通过@ 引用dialog标签title属性的值，所以这里能取到值
 console.log('>>>title:' + $scope.title);
 >>>title:Hello carl scope.html:85
 // 通过$parent直接获取父scope变量页可以
 console.log('>>>parent username:' + $scope.$parent.username);
 >>>parent username:carl
 // directive scope 没有定义username 变量,并且没有引用父scope username变量, 所以这里是undefined
 console.log('>>>child username:' + $scope.username);
 >>>username:undefined
 // 接收由父controller广播count变更事件
 $scope.$on('CountStatusChange', function (event, args) {
 console.log("child scope on(监听) recieve count Change event :" + args.val);
 });
 // watch 父 controller scope对象
 $scope.$parent.$watch('person.Count', function (newVal, oldVal) {
 console.log('>>>>>>>child watch parent scope[Count]:' + oldVal + ' newVal:' + newVal);
 });
 }]
 };
});