1.在 AngularJS 中我们可以使用 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
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>选择框Select</title> <script src="angular-1.4.1/angular.min.js"></script> </head> <body> <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){ $scope.names = ["谷歌","百度","搜狗"]; }); </script> </body> </html>
运行结果:
用ng-option加载列表:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>选择框Select</title> <script src="angular-1.4.1/angular.min.js"></script> <script> var app = angular.module(‘myApp‘, []); app.controller(‘customersCtrl‘, function($scope) { $scope.sites = [ {site:"谷歌",url:"http:www.google.com"}, {site:"百度",url:"http:www.baidu.com"}, {site:"搜狗",url:"http:www.sogou.com"} ]; }); </script> </head> <body> <div ng-app="myApp" ng-controller="customersCtrl"> <select ng-model="selectedSite" ng-options="x.site for x in sites"> </select> <h1>你选择的内容如下:</h1> <p>名字:{{selectedSite.site}}</p> <p>网址为:{{selectedSite.url}}</p> </div> </body> </html>
运行结果:
用ng-repeat加载列表数据也可以但是有局限性,选择的是一个字符串:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>选择框Select</title> <script src="angular-1.4.1/angular.min.js"></script> <script> var app = angular.module(‘myApp‘, []); app.controller(‘customersCtrl‘, function($scope) { $scope.sites = [ {site:"谷歌",url:"http:www.google.com"}, {site:"百度",url:"http:www.baidu.com"}, {site:"搜狗",url:"http:www.sogou.com"} ]; }); </script> </head> <body> <div ng-app="myApp" ng-controller="customersCtrl"> <select ng-model="selectedSite"> <option ng-repeat="x in sites" value="{{x.url}}">{{x.site}}</option> </select> <h1>你选择的内容是:{{selectedSite}}</h1> </div> </body> </html>
运行结果:
ng-options使用对象有很大的不同,使用对象作为数据源, x 为键(key), y 为值(value),select控件ng-options表示控件的值是什么,然后ng-model绑定了数据对应的数据源:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>选择框Select</title> <script src="angular-1.4.1/angular.min.js"></script> <script> var app = angular.module(‘myApp‘, []); app.controller(‘customersCtrl‘, function($scope) { $scope.sites = { site01 : "Google", site02 : "Runoob", site03 : "Taobao" }; }); </script> </head> <body> <div ng-app="myApp" ng-controller="customersCtrl"> <select ng-model="selectedSite" ng-options="x for (x, y) in sites"> </select> 你选择的是:{{selectedSite}} </div> </body> </html>
运行结果 你选择的值为在 key-value 对中的 value。
此外value 在 key-value 对中也可以是个对象:选择的值在 key-value 对的 value 中, 这是它是一个对象:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>选择框Select</title> <script src="angular-1.4.1/angular.min.js"></script> <script> var app = angular.module(‘myApp‘, []); app.controller(‘customersCtrl‘, function($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> </head> <body> <div ng-app="myApp" ng-controller="customersCtrl"> <select ng-model="selectedCar" ng-options="y.brand for (x, y) in cars"> </select> 你选择的是:{{selectedCar}} </div> </body> </html>
运行结果:
时间: 2024-10-05 04:43:15