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AngularJS service之select下拉菜单效果

更新时间:2020-05-27 13:12:01 作者:startmvc
本文实例为大家分享了service之select下拉菜单效果的具体代码,供大家参考,具体内容如下&l

本文实例为大家分享了service之select下拉菜单效果的具体代码,供大家参考,具体内容如下


<!-- $watch:持续监听数据上的变化,更新界面 -->
<!DOCTYPE html>
<html lang="en" ng-app="myApp" ng-controller="myCtrl">
 <head>
 <meta charset="utf-8">
 <script src="js/angular.js"></script>
 </head>
 <body>
 使用ng-options
 <select ng-model=names[0] ng-options="x for x in names">

 </select><br>

 使用ng-repeat
 <select>
 <option ng-repeat="x in names">{{x}}</option>
 </select><br><br>

 区别<br>
 ng-options更适合来做下拉菜单<br>
 为什么这么说?<br><br><br>
 <div style="color: red">使用ng-repeat操作数组</div><br>
 <select ng-model="selectedSite">
 <option ng-repeat="x in sites" value="{{x.url}}">{{x.site}}</option>

 </select><br>
 <h1>你选择的是: {{selectedSite}}</h1><br>


 <div style="color: red">使用ng-options操作数组</div><br>
 <select ng-model="selectedSite2" ng-options="x.site for x in sites">

 </select><br>
 <h1>你选择的是: {{selectedSite2.site}}</h1><br>
 <p>网址为: {{selectedSite2.url}}</p><br><br>
 看得出,ng-options操作的是对象 而ng-repeat操作的是字符串
 当选择值是一个对象时,我们就可以获取更多信息,应用也更灵活。<br><br><br><br>

 <div style="color: red">使用ng-options来操作对象</div>
 <select ng-model="selectedSite3" ng-options="x for (x, y) in sites2">
 </select><br>
 <h1>你选择的值是: {{selectedSite3}}</h1><br><br><br><br>

 <p>选择一辆车:</p><br>

 <select ng-model="selectedCar" ng-options="x for (x, y) in cars">
 </select><br>

 <h1>你选择的是: {{selectedCar.brand}}</h1><br>
 <h2>模型: {{selectedCar.model}}</h2><br>
 <h3>颜色: {{selectedCar.color}}</h3><br>

 <p>注意选中的值是一个对象。</p>

 </body>
 <script>
 var app = angular.module('myApp', []);
 app.controller('myCtrl', function($scope) {
 $scope.names = ["Google", "Runoob", "Taobao"];
 $scope.sites = [
 {site : "Google", url : "http://www.google.com"},
 {site : "Runoob", url : "http://www.runoob.com"},
 {site : "Taobao", url : "http://www.taobao.com"}
 ];
 $scope.sites2 = {
 site01 : "Google",
 site02 : "Runoob",
 site03 : "Taobao"
 };
 $scope.cars = {
 car01 : {brand : "Ford", model : "Mustang", color : "red"},
 car02 : {brand : "Fiat", model : "500", color : "white"},
 car03 : {brand : "Volvo", model : "XC90", color : "black"}
 }
 });
</script>
</html>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

AngularJS service select 下拉菜单