9.ng-options

转自：https://www.cnblogs.com/best/tag/Angular/
该指令允许你基于一个迭代表达式添加选项
</select>
ng-model必须要指定，默认情况下被选择的值就是当前对象，没有value的项将被清除。
示例代码：
 1 <!DOCTYPE html>
 2 <!--指定angular管理的范围-->
 3 <html ng-app="app01">
 4     <head>
 5         <meta charset="UTF-8">
 6         <title>指令</title>
 7     </head>
 8     <body>
 9         <!--指定控制器的作用范围-->
10         <form ng-controller="Controller1" name="form1">
11             <h3>基础下拉列表：</h3>
12             <p>
13                 <select ng-model="user1" ng-options="u.name for u in users">
14                     <option value="">--请选择--</option>
15                 </select>
16                 <span> {{user1}}</span>
17             </p>
18             <h3>带分组的下拉列表：</h3>
19             <p>
20                 <select ng-model="user2" ng-options="u.name group by u.sex for u in users">
21                     <option  value="">--请选择--</option>
22                 </select>
23                 <span> {{user2}}</span>
24             </p>
25             <h3>组合的下拉列表：</h3>
26             <p>
27                 <select ng-model="user3" ng-options="(u.name+u.age+'岁') group by u.sex for u in users">
28                     <option  value="">--请选择--</option>
29                 </select>
30                 <span> {{user3}}</span>
31             </p>
32             <h3>自定义ng-model的值：</h3>
33             <p>
34                 <select ng-model="user4" ng-options="u.id as u.name group by u.sex for u in users">
35                     <option  value="">--请选择--</option>
36                 </select>
37                 <span> {{user4}}</span>
38             </p>
39         </form>
40         <!--引入angularjs框架-->
41         <script src="js/angular146/angular.min.js" type="text/javascript" charset="utf-8"></script>
42         <script type="text/javascript">
43             //定义模块，指定依赖项为空
44             var app01 = angular.module("app01", []);
45             //定义控制器，指定控制器的名称，$scope是全局对象
46             app01.controller("Controller1", function($scope) {
47                 $scope.users = [{
48                     id: 1,
49                     name: "tom",
50                     sex: "男",
51                     age: 19
52                 }, {
53                     id: 2,
54                     name: "rose",
55                     sex: "女",
56                     age: 18
57                 }, {
58                     id: 7,
59                     name: "jack",
60                     sex: "男",
61                     age: 16
62                 }, {
63                     id: 9,
64                     name: "lucy",
65                     sex: "女",
66                     age: 20
67                 }, {
68                     id: 15,
69                     name: "mark",
70                     sex: "男",
71                     age: 89
72                 }];
73             });
74         </script>
75     </body>
76 </html>
运行结果：