[转]AngularJS 之 ng-options指令
一. 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 = '';
$sc.optData = [{
id: 10001,
MainCategory: '男',
ProductName: '水洗T恤',
ProductColor: '白'
},{
id: 10002,
MainCategory: '女',
ProductName: '圓領短袖',
ProductColor: '黃'
},{
id: 10003,
MainCategory: '女',
ProductName: '圓領短袖',
ProductColor: '黃'
}];
}]);
二. 自定义下拉显示名称(label for value in array)
label可以根据需要拼接出不同的字符串
<div ng-controller="ngselect2">
<p>usage:label for value in array(label可以根据需求拼接出不同的字符串)</p>
<p>选项，{{selected}}</p>
<select ng-model="selected" ng-options="(o.ProductColor+'-'+o.ProductName) for o in optData">
<option value="">-- 请选择 --</option>
</select>
</div>
m1.controller("ngselect2",['$scope',function($sc){
$sc.selected = '';
$sc.optData = [{
id: 10001,
MainCategory: '男',
ProductName: '水洗T恤',
ProductColor: '白'
},{
id: 10002,
MainCategory: '女',
ProductName: '圓領短袖',
ProductColor: '黃'
},{
id: 10003,
MainCategory: '女',
ProductName: '圓領短袖',
ProductColor: '黃'
}];
}]);
三. ng-options 选项分组
group by分组项
<div ng-controller="ngselect3">
<p>usage:label group by groupName for value in array</p>
<p>选项，{{selected}}</p>
<select ng-model="selected" ng-options="(o.ProductColor+'-'+o.ProductName) group by o.MainCategory for o in optData">
<option value="">-- 请选择 --</option>
</select>
</div>
m1.controller("ngselect3",['$scope',function($sc){
$sc.selected = '';
$sc.optData = [{
id: 10001,
MainCategory: '男',
ProductName: '水洗T恤',
ProductColor: '白'
},{
id: 10002,
MainCategory: '女',
ProductName: '圓領长袖',
ProductColor: '黃'
},{
id: 10003,
MainCategory: '女',
ProductName: '圓領短袖',
ProductColor: '黃'
}];
}]);
四. ng-options 自定义ngModel的绑定
下面selected的值为optData的id
<div ng-controller="ngselect4">
<p>usage:select as label for value in array</p>
<p>选项，{{selected}}</p>
<select ng-model="selected" ng-options="o.id as o.ProductName for o in optData">
<option value="">-- 请选择 --</option>
</select>
</div>
m1.controller("ngselect4",['$scope',function($sc){
$sc.selected = '';
$sc.optData = [{
id: 10001,
MainCategory: '男',
ProductName: '水洗T恤',
ProductColor: '白'
},{
id: 10002,
MainCategory: '女',
ProductName: '圓領长袖',
ProductColor: '黃'
},{
id: 10003,
MainCategory: '女',
ProductName: '圓領短袖',
ProductColor: '黃'
}];
}]);
五. ng-options 多级下拉
<div ng-controller="ngselect5">
<select ng-model="selectedPerson" ng-options="obj.name for obj in people"></select>
<select ng-model="selectedGenre">
<option ng-repeat="label in people[selectedPerson.id].interest">{{label}}</option>
</select>
</div>
m1.controller("ngselect5",['$scope',function($sc){
$sc.people = [
{
id: 0,
name: '张三',
interest: [
'爬山',
'游泳',
'旅游',
'美食'
]
},
{
id: 1,
name: '李四',
interest: [
'音乐',
'美食',
'Coffee',
'看书'
]
},
{
id: 2,
name: '王五',
interest: [
'音乐',
'电影',
'中国好声音',
'爸爸去哪了',
'非常静距离'
]
},
{
id: 3,
name: '小白',
interest: [
'游泳',
'游戏',
'宅家里'
]
}
];
}]);
六. 在 select 中禁用某些结果.
<select ng-model="myColor"
ng-options="color.name group by color.shade disable when color.notAnOption for color in colors">
</select>
七. 官网示例参考
<script>
angular.module('selectExample', [])
.controller('ExampleController', ['$scope', function($scope) {
$scope.colors = [
{name:'black', shade:'dark'},
{name:'white', shade:'light', notAnOption: true},
{name:'red', shade:'dark'},
{name:'blue', shade:'dark', notAnOption: true},
{name:'yellow', shade:'light', notAnOption: false}
];
$scope.myColor = $scope.colors[2]; // red
}]);
</script>
<div ng-controller="ExampleController">
<ul>
<li ng-repeat="color in colors">
<label>Name: <input ng-model="color.name"></label>
<label><input type="checkbox" ng-model="color.notAnOption"> Disabled?</label>
<button ng-click="colors.splice($index, 1)" aria-label="Remove">X</button>
</li>
<li>
<button ng-click="colors.push({})">add</button>
</li>
</ul>
<hr/>
<label>Color (null not allowed):
<select ng-model="myColor" ng-options="color.name for color in colors"></select>
</label><br/>
<label>Color (null allowed):
<span class="nullable">
<select ng-model="myColor" ng-options="color.name for color in colors">
<option value="">-- choose color --</option>
</select>
</span></label><br/>
<label>Color grouped by shade:
<select ng-model="myColor" ng-options="color.name group by color.shade for color in colors">
</select>
</label><br/>
<label>Color grouped by shade, with some disabled:
<select ng-model="myColor"
ng-options="color.name group by color.shade disable when color.notAnOption for color in colors">
</select>
</label><br/>
Select <button ng-click="myColor = { name:'not in list', shade: 'other' }">bogus</button>.
<br/>
<hr/>
Currently selected: {{ {selected_color:myColor} }}
<div style="border:solid 1px black; height:20px"
ng-style="{'background-color':myColor.name}">
</div>
</div>
