angularjs之ng-option

ng-options一般有以下用法：

对于数组：

• label for value in array
• select as label for value in array
• label group by group for value in array
• label disable when disable for value in array
• label group by group for value in array track by trackexpr
• label disable when disable for value in array track by trackexpr
• label for value in array | orderBy:orderexpr track by trackexpr(for including a filter with track by)
• 对于对象：

• label for (key , value) in object
• select as label for (key ,value) in object
• label group by group for (key,value) in object
• label disable when disable for (key, value) in object
• select as label group by group for(key, value) in object
• select as label disable when disable for (key, value) in object

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

<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‘
    }];
}]);

5.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‘
                        ]
                    }
                ];
}]);

原网址：http://www.cnblogs.com/zhx1991/p/4579886.html