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AngularJS(6)-选择框Select

2024-08-14 23:33:26   213人阅读

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="http://www.mamicode.com/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:　　

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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="http://www.mamicode.com/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：

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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="http://www.mamicode.com/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="http://www.mamicode.com/{{x.url}}">{{x.site}}</option>      </select>      <h1>你选择的内容是:{{selectedSite}}</h1>  </div></body></html>

　　运行结果：

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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="http://www.mamicode.com/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。

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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="http://www.mamicode.com/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：

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AngularJS(6)-选择框Select


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