AngularJS学习笔记之ng-options指令

1.基本下拉效果(lable for value in array)

　　其中select标签中的ng-model属性必须有，其值为选中的对象或属性值。

<div ng-controller="ngselect">
  <p>usage:label for value in array</p>
  <p>选项，{{selected}}</p>
  <select ng-model="selected" ng-options="o.id for o in optdata">
    <option value="">-- 请选择 --</option>
  </select>
</div>
m1.controller("ngselect",['$scope',function($sc){
  $sc.selected = '';
  $sc.optdata = [{
    id: 10001,
    maincategory: '男',
    productname: '水洗t恤',
    productcolor: '白'
  },{
    id: 10002,
    maincategory: '女',
    productname: '圓領短袖',
    productcolor: '黃'
  },{
    id: 10003,
    maincategory: '女',
    productname: '圓領短袖',
    productcolor: '黃'
  }];
}]);

2.自定义下拉显示名称(label for value in array)

    label可以根据需要拼接出不同的字符串

<div ng-controller="ngselect2">
  <p>usage:label for value in array(label可以根据需求拼接出不同的字符串)</p>
  <p>选项，{{selected}}</p>
  <select ng-model="selected" ng-options="(o.productcolor+'-'+o.productname) for o in optdata">
    <option value="">-- 请选择 --</option>
  </select>
</div>
m1.controller("ngselect2",['$scope',function($sc){
  $sc.selected = '';
  $sc.optdata = [{
    id: 10001,
    maincategory: '男',
    productname: '水洗t恤',
    productcolor: '白'
  },{
    id: 10002,
    maincategory: '女',
    productname: '圓領短袖',
    productcolor: '黃'
  },{
    id: 10003,
    maincategory: '女',
    productname: '圓領短袖',
    productcolor: '黃'
  }];
}]);

3.ng-options 选项分组

    group by分组项

<div ng-controller="ngselect3">
  <p>usage:label group by groupname for value in array</p>
  <p>选项，{{selected}}</p>
  <select ng-model="selected" ng-options="(o.productcolor+'-'+o.productname) group by o.maincategory for o in optdata">
    <option value="">-- 请选择 --</option>
  </select>
</div>
m1.controller("ngselect3",['$scope',function($sc){
  $sc.selected = '';
  $sc.optdata = [{
    id: 10001,
    maincategory: '男',
    productname: '水洗t恤',
    productcolor: '白'
  },{
    id: 10002,
    maincategory: '女',
    productname: '圓領长袖',
    productcolor: '黃'
  },{
    id: 10003,
    maincategory: '女',
    productname: '圓領短袖',
    productcolor: '黃'
  }];
}]);

4.ng-options 自定义ngmodel的绑定

    下面selected的值为optdata的id 效果

<div ng-controller="ngselect4">
  <p>usage:select as label for value in array</p>
  <p>选项，{{selected}}</p>
  <select ng-model="selected" ng-options="o.id as o.productname for o in optdata">
    <option value="">-- 请选择 --</option>
  </select>
</div>
m1.controller("ngselect4",['$scope',function($sc){
  $sc.selected = '';
  $sc.optdata = [{
    id: 10001,
    maincategory: '男',
    productname: '水洗t恤',
    productcolor: '白'
  },{
    id: 10002,
    maincategory: '女',
    productname: '圓領长袖',
    productcolor: '黃'
  },{
    id: 10003,
    maincategory: '女',
    productname: '圓領短袖',
    productcolor: '黃'
  }];
}]);

效果：

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