AngularJS-选择框Select

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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:  

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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="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="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:

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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="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="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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