本次做一个简单的关于动态生成select的练习
在实现上有两种方式：
其一、通过ng-repeat来实现
其二、通过ng-option来实现
在页面效果上，两种实现的效果都一样
但是在数据选择的数据从操作上有所不同
ng-repeat选中的是其option对应的value值
ng-option选择的是其对应绑定数据的一个object对象
在实际应用中建议采用ng-option实现
代码实例：
代码语言：javascript复制<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
</head>
<body ng-app="myApp">
<div ng-controller="CityController">
<div style="margin-bottom: 40px;">
<h1>通过ng-options实现</h1>
<select ng-model="city" id="selectCity1"
ng-options="city1.name for city1 in cities">
<option value="">请选择</option>
</select>
所选择的城市信息: {{ city }}
</div>
<div style="margin-bottom: 40px;">
<h1>通过ng-repeat实现</h1>
<select ng-model="city2" id="selectCity2">
<option value="" selected="selected">请选择</option>
<option ng-repeat="city in cities" value="{{city.id}}">{{city.name}}</option>
</select>
所选择的城市ID: {{ city2 }}
</div>
<div>
<input type="text" ng-model="newCityName" placeholder="请输入新增城市的名称" />
<input type="button" ng-click="addCity()" value="新增城市" />
</div>
</div>
</body>
</html>
<script src="../JS/angular.js"></script>
<script type="text/javascript">
var app = angular.module("myApp", []);
app.controller("CityController", function ($scope) {
//// 初始化城市数据
$scope.cities = [
{ name: '成都', id: 1 },
{ name: '南充', id: 2 },
{ name: '绵阳', id: 3 },
{ name: '达州', id: 4 },
{ name: '泸州', id: 5 }
];
//// 新增一个城市信息
$scope.addCity = function () {
if ($scope.newCityName) {
$scope.cities.push({ name: $scope.newCityName, id: $scope.getCityMaxId() 1 });
}
}
//// 获取已有城市列表中城市ID最大值
$scope.getCityMaxId = function () {
var cityIdArry = new Array();
for (var i in $scope.cities) {
cityIdArry.push($scope.cities[i].id);
}
cityIdArry.sort(function (num1, num2) {
return num1 - num2;
});
return cityIdArry[cityIdArry.length - 1];
};
});
</script>
