双向绑定

  双向绑定是angularJS的重要特性,也就是数据影响视图,视图也会影响数据。

一个M影响V最简单的示例就是这样:

<div ng-controller="CounterCtrl">
    <span ng-bind="counter"></span>
    <button ng-click="counter++">increase</button>
</div>
function CounterCtrl($scope) {
    $scope.counter = 1;
}

这个例子很简单,毫无特别之处,每当点击一次按钮,界面上的数字就增加一。

下面,我们举一个V影响M的例子:

<!DOCTYPE html>
<html ng-app>
<head>
    <meta charset="utf-8">
    <title>ng-model directive</title>
</head>
<body ng-controller="HelloController">
<div>
    <p>双向绑定</p>
    <input ng-model="greeting">
    <p>Hello {{greeting || "World"}}</p>
    <button ng-click="init()">重置</button>
    <hr>
</div>
 
<script src="../lib/angularjs/1.2.26/angular.min.js"></script>
<script>
    function HelloController($scope) {
        $scope.init = function() {
            $scope.greeting = "Hello";
        }
    }
</script>
</body>
</html>

 

posted @ 2015-11-24 23:57  很好玩  阅读(355)  评论(0编辑  收藏  举报