1、Select概述AngularJS 中可以使用 ng-option 指令来创建一个下拉列表,列表项通过对象和数组循环输出
<div ng-app="myApp" ng-controller="myCtrl"><select ng-model="selectedName" ng-options="x for x in names"></select></div><script>var app = angular.module("myApp", []);app.controller("myCtrl", function($scope) {$scope.names = ["Google", "Runoob", "Taobao"];});</script>
2、数据源为对象选择的值为在 key-value 对中的key:
<div ng-app="myApp" ng-controller="myCtrl"><p>选择一辆车:</p><select ng-model="selectedCar" ng-options="x for (x, y) in cars"></select><h1>你选择的是: {{selectedCar.brand}}</h1><h2>模型: {{selectedCar.model}}</h2><h3>颜色: {{selectedCar.color}}</h3><p>注意选中的值是一个对象。</p></div><script>var app = angular.module("myApp", []);app.controller("myCtrl", function($scope) {$scope.cars = {car01 : {brand : "Ford", model : "Mustang", color : "red"},car02 : {brand : "Fiat", model : "500", color : "white"},car03 : {brand : "Volvo", model : "XC90", color : "black"}}});</script>
选择的值为在 key-value 对中的value对象一个属性:
<div ng-app="myApp" ng-controller="myCtrl"><p>选择一辆车:</p><select ng-model="selectedCar" ng-options="y.brand for (x, y) in cars"></select><p>你选择的是: {{selectedCar.brand}}</p><p>型号为: {{selectedCar.model}}</p><p>颜色为: {{selectedCar.color}}</p><p>下拉列表中的选项也可以是对象的属性。</p></div><script>var app = angular.module("myApp", []);app.controller("myCtrl", function($scope) {$scope.cars = {car01 : {brand : "Ford", model : "Mustang", color : "red"},car02 : {brand : "Fiat", model : "500", color : "white"},car03 : {brand : "Volvo", model : "XC90", color : "black"}}});</script>
3、ng-options 与 ng-repeat也可以使用ng-repeat 指令来创建下拉列表。
ng-repeat 指令是通过数组来循环 HTML 代码来创建下拉列表,但 ng-options 指令更适合创建下拉列表,它有以下优势:
使用 ng-options 的选项的一个对象, ng-repeat 是一个字符串。
1)ng-repeat 有局限性,选择的值是一个字符串:
<div ng-app="myApp" ng-controller="myCtrl"><p>选择网站:</p><select ng-model="selectedSite"><option ng-repeat="x in sites" value="{{x.url}}">{{x.site}}</option></select><h1>你选择的是: {{selectedSite}}</h1></div><script>var app = angular.module("myApp", []);app.controller("myCtrl", function($scope) {$scope.sites = [{site : "Google", url : "http://www.google.com"},{site : "Runoob", url : "http://www.runoob.com"},{site : "Taobao", url : "http://www.taobao.com"}];});</script>
2)使用 ng-options 指令,选择的值是一个对象:
<div ng-app="myApp" ng-controller="myCtrl"><p>选择网站:</p><select ng-model="selectedSite" ng-options="x.site for x in sites"></select><h1>你选择的是: {{selectedSite.site}}</h1><p>网址为: {{selectedSite.url}}</p></div><script>var app = angular.module("myApp", []);app.controller("myCtrl", function($scope) {$scope.sites = [{site : "Google", url : "http://www.google.com"},{site : "Runoob", url : "http://www.runoob.com"},{site : "Taobao", url : "http://www.taobao.com"}];});</script>
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