分享Angularjs双向绑定的实例教程

来源：动视网责编：小采时间：2020-11-27 20:20:21

分享Angularjs双向绑定的实例教程

分享Angularjs双向绑定的实例教程:问题：<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js1

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导读分享Angularjs双向绑定的实例教程:问题：<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js1

问题：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js?1.1.11"></script> 
</head>
<body>

<div ng-app="myApp">

<p ng-controller = "myContrl">

结果为 <span ng-bind="" ></span> <input type="text" ng-model="first">{{first+second}}</p> </div> <script>var app = angular.module("myApp",[]); app.controller("myContrl",function($scope){ $scope.first = 5; $scope.second =10; });</script> </body> </html>

显示结果为

但是，我要是输入50，想要结果为60

因为这个是字符串类型需要转换成数字类型

解决方法：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js?1.1.11"></script> 
</head>
<body>

<div ng-app="myApp">

<p ng-controller = "myContrl">

结果为 <span ng-bind="" ></span> <input type="text" ng-model="first">{{first *1+second*1}}</p> </div> <script>var app = angular.module("myApp",[]); app.controller("myContrl",function($scope){ $scope.first = 5; $scope.second =10; });</script> </body> </html>

显示即可正常即是在 {{first *1+second*1}}显示的时候，转换了一下

或者，启用事件监听

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js?1.1.11"></script> 
</head>
<body>

<div ng-app="myApp">

<p ng-controller = "myContrl">

结果为 <span ng-bind="" ></span> <input type="text" ng-model="first">{{total}}</p> </div> <script>var app = angular.module("myApp",[]); app.controller("myContrl",function($scope){ $scope.first = 5; $scope.second =10; $scope.total = parseInt($scope.first)+parseInt($scope.second); $scope.$watch(function(){return $scope.first; },function(newValue,oldValue){ if(newValue != oldValue){ $scope.total = parseInt($scope.first)+parseInt($scope.second); } }); });</script> </body> </html>

也能输出正确结果

分享Angularjs双向绑定的实例教程

分享Angularjs双向绑定的实例教程:问题：<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js1

推荐度：

点击下载本文 文档为doc格式

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