angular js 事件

(1)angular js支持的事件

  • ng-click
  • ng-dbl-click
  • ng-mousedown
  • ng-mouseenter
  • ng-mouseleave
  • ng-mousemove
  • ng-keydown
  • ng-keyup
  • ng-keypress
  • ng-change
(2)實例

         點擊按鈕,實現“測試”的顯示與隱藏

<!DOCTYPE html>
<html ng-app="testEvent">
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body ng-controller="myctrl">
<span ng-hide="isHide">測試</span>
<button ng-click="toggle()">隱藏/顯示</button>


<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
<script>
    var app = angular.module(
            "testEvent",
            []
    );
    app.controller("myctrl",function($scope){
        $scope.isHide = false;

        $scope.toggle = function(){
            $scope.isHide = !$scope.isHide;
        }
    });
</script>
</body>
</html>

(3)自定義事件傳播

               1.前提

                  必須有controller嵌套,否則無法接收事件

<div ng-controller="ParentCtrl">

   <div ng-controller="SelfCtrl">

     <a class="btn" ng-click="click()">click me</a>
     <div ng-controller="ChildCtrl"></div>

   </div>

   <div ng-controller="BroCtrl"></div>
</div>
               這裏四個controller的層級關係如下:
               

             所有的事件都是從SelfCtrl發出


            2.$broadcast

                事件發送的方法:

$scope.$broadcast
               事件的接收方法:

$scope.$on
              broadcast是從發送者向他的子scope發送事件的一個方法,所以父scope不會收到
angular.module('TestApp', ['ng'])
.controller('ParentCtrl', function($scope) {
 $scope.$on('to-child', function(e, d) {
   console.log('關我毛事');
 });
})
.controller('SelfCtrl', function($scope) {
  $scope.click = function () {
    $scope.$broadcast('to-child', 'haha');
  }
})
.controller('ChildCtrl', function($scope){
  $scope.$on('to-child', function(e, d) {
    console.log('I\' the child, I got it', d);
  });
})
.controller('BroCtrl', function($scope){
  $scope.$on('to-child', function(e, d) {
    console.log('關我毛事');
  });
})
;

            3.$emit

                事件發送的方法:

$scope.$broadcast
               只有父scope能夠收到

angular.module('TestApp', ['ng'])
.controller('ParentCtrl', function($scope) {
 $scope.$on('to-parent', function(e, d) {
    console.log('we are the parent, I got it', d);
 });
})
.controller('SelfCtrl', function($scope) {
  $scope.click = function () {
    $scope.$emit('to-parent', 'hehe');
  }
})
.controller('ChildCtrl', function($scope){
  $scope.$on('to-parent', function(e, d) {
   console.log('關我毛事');
  });
})
.controller('BroCtrl', function($scope){
  $scope.$on('to-parent', function(e, d) {
    console.log('關我毛事');
  });
})
;

           4.說明
              不管是$broadcast還是$emit,兄弟controller永遠都不會收到事件



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