AngularJS全局scope与Isolate scope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);
        });
      }]
    };
});