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angular js 事件

2016-01-19 10:22 615 查看
（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）实例

点击按钮，实现“测试”的显示与隐藏

<!DOCTYPE html>
<html ng-app="testEvent">
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body ng-controller="myctrl">
<span ng-hide="isHide">测试</span>
<button ng-click="toggle()">隐藏/显示</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）自定义事件传播
1.前提
必须有controller嵌套，否则无法接收事件
<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>
这里四个controller的层级关系如下：



所有的事件都是从SelfCtrl发出

2.$broadcast

事件发送的方法：

$scope.$broadcast
事件的接收方法：

$scope.$on
broadcast是从发送者向他的子scope发送事件的一个方法，所以父scope不会收到

angular.module('TestApp', ['ng'])
.controller('ParentCtrl', function($scope) {
$scope.$on('to-child', function(e, d) {
console.log('关我毛事');
});
})
.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('关我毛事');
});
})
;


3.$emit

事件发送的方法：
$scope.$broadcast
只有父scope能够收到
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('关我毛事');
});
})
.controller('BroCtrl', function($scope){
$scope.$on('to-parent', function(e, d) {
console.log('关我毛事');
});
})
;


4.说明

不管是$broadcast还是$emit，兄弟controller永远都不会收到事件
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