angular学习笔记(十三)

本篇主要介绍控制器的$scope中的数据是如何被改变的:

以下三种方法,都可以改变$scope中的number值:

1. 表达式:

<span ng-click="number=number+3">点击改变值1</span>

2. 回调函数:

<span ng-click="computeNum()">点击改变值2</span>

$scope.computeNum = function(){
  $scope.number = $scope.number+3
}

3. input元素的ng-model属性:

<input type="text" ng-model="number"/>

完整代码:

<!DOCTYPE html>
<html ng-app>
<head>
  <title>10.1$scope数据控制</title>
  <meta charset="utf-8">
  <script src="../angular.js"></script>
  <script src="script.js"></script>
</head>
<body>
<div ng-controller = "ScopeData">
  <span ng-click="number=number+3">点击改变值1</span>
  <br>
  <span ng-click="computeNum()">点击改变值2</span>
  <br>
  <span><input type="text" ng-model="number"/></span>
  <p>{{number}}</p>
</div>
</body>
</html>
function ScopeData ($scope){
    $scope.number = 0;
    $scope.computeNum = function(){
        $scope.number = $scope.number+3
    }
}

可以看到,这三种方法都可以动态实时的改变$scope中number的值,其中,1和2是等价的.

*注意,在表达式里直接写ng-click="number-3"是无效的表达式.

原文地址:https://www.cnblogs.com/liulangmao/p/3720363.html