1、AngularJS Select(选择框)
AngularJS 可以使用数组或对象创建一个下拉列表选项。
ng-option：创建一个下拉列表，列表项通过对象和数组循环输出
eg：
<div ng-app="myApp" ng-controller="myCtrl"> <select ng-init="selectedName = names[0]" 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>
ng-repeat：通过数组来循环 HTML 代码来创建下拉列表
eg：
<select> <option ng-repeat="x in names">{{x}}</option> </select>
2、ng-option比ng-repeat更适合创建下拉列表的优势
使用 ng-options 的选项是一个对象， ng-repeat 是一个字符串。
实例1
$scope.sites = [
{site : "Google", url : "http://www.google.com"},
{site : "baidu", url : "http://www.baidu.com"},
{site : "Taobao", url : "http://www.taobao.com"}
];
<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>
<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>
实例2
$scope.sites = {
site01 : "Google",
site02 : "Runoob",
site03 : "Taobao"
};
<select ng-model="selectedSite" ng-options="x for (x, y) in sites"> </select> <h1>你选择的值是: {{selectedSite}}</h1>
$scope.cars = {
car01 : {brand : "Ford", model : "Mustang", color : "red"},
car02 : {brand : "Fiat", model : "500", color : "white"},
car03 : {brand : "Volvo", model : "XC90", color : "black"}
};
<select ng-model="selectedCar" ng-options="y.brand for (x, y) in cars"> </select>
3、代码
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <script src="js/angular.min.js"></script> </head> <body> <div ng-app="myApp" ng-controller="myCtrl"> <!-- 使用 ng-options 创建选择框 --> <div> <h2>使用 ng-options 创建选择框</h2> <select ng-init="selectedName = names[0]" ng-model="selectedName" ng-options="x for x in names"></select> <select ng-model="selectSite" ng-options="s.site for s in sites track by it.url"></select> <h4>你选择的是: {{selectSite.site}}</h4> <p>网址为: {{selectSite.url}}</p> <select ng-model="selectedCar" ng-options="y.brand for (x,y) in cars"></select> <h4>你选择的是: {{selectedCar.brand}}</h4> <h4>模型: {{selectedCar.model}}</h4> <h4>颜色: {{selectedCar.color}}</h4> </div> <p></p> <!-- 使用 ng-repeat 创建选择框 --> <div> <h2>使用 ng-repeat 创建选择框</h2> <select> <option ng-repeat="x in names">{{x}}</option> </select> <select ng-model="selectedSite"> <option ng-repeat="x in sites" value="{{x.url}}">{{x.site}}</option> </select> <h4>你选择的是: {{selectedSite}}</h4> </div> </div> </body> </html> <script> var app = angular.module('myApp', []); app.controller('myCtrl', function ($scope) { $scope.names = ["Google", "baidu", "Taobao"]; $scope.sites = [ {site : "Google", url : "http://www.google.com"}, {site : "baidu", url : "http://www.baidu.com"}, {site : "Taobao", url : "http://www.taobao.com"} ]; $scope.cars = { car01 : {brand : "Ford", model : "Mustang", color : "red"}, car02 : {brand : "Fiat", model : "500", color : "white"}, car03 : {brand : "Volvo", model : "XC90", color : "black"} }; }); </script>