我有几个复选框：
<input type='checkBox' value="apple" checked> <input type='checkBox' value="orange"> <input type='checkBox' value="pear" checked> <input type='checkBox' value="naartjie">
我想绑定到我的控制器中的列表，使得每当一个复选框被改变时，控制器维护所有被检查的值的列表，例如[‘apple’，’pear’]。
ng-model似乎只能将一个复选框的值绑定到控制器中的变量。
有另一种方法来做，使我可以绑定四个复选框到控制器中的列表？
有两种方法来处理这个问题。使用简单的数组或对象数组。每个解决方案都有它的利弊。下面你会找到一个每个案件。
用一个简单的数组作为输入数据
HTML可能如下所示：
<label ng-repeat="fruitName in fruits">
<input
type="checkBox"
name="selectedFruits[]"
value="{{fruitName}}"
ng-checked="selection.indexOf(fruitName) > -1"
ng-click="toggleSelection(fruitName)"
> {{fruitName}}
</label>
并且适当的控制器代码将是：
app.controller('SimpleArrayCtrl',['$scope',function SimpleArrayCtrl($scope) {
// Fruits
$scope.fruits = ['apple','orange','pear','naartjie'];
// Selected fruits
$scope.selection = ['apple','pear'];
// Toggle selection for a given fruit by name
$scope.toggleSelection = function toggleSelection(fruitName) {
var idx = $scope.selection.indexOf(fruitName);
// Is currently selected
if (idx > -1) {
$scope.selection.splice(idx,1);
}
// Is newly selected
else {
$scope.selection.push(fruitName);
}
};
}]);
优点：简单的数据结构和按名称切换容易处理
缺点：添加/删除是麻烦的，因为必须管理两个列表(输入和选择)
用对象数组作为输入数据
HTML可能如下所示：
<label ng-repeat="fruit in fruits">
<!--
- Use `value="{{fruit.name}}"` to give the input a real value,in case the form gets submitted
traditionally
- Use `ng-checked="fruit.selected"` to have the checkBox checked based on some angular expression
(no two-way-data-binding)
- Use `ng-model="fruit.selected"` to utilize two-way-data-binding. Note that `.selected`
is arbitrary. The property name could be anything and will be created on the object if not present.
-->
<input
type="checkBox"
name="selectedFruits[]"
value="{{fruit.name}}"
ng-model="fruit.selected"
> {{fruit.name}}
</label>
并且适当的控制器代码将是：
app.controller('ObjectArrayCtrl','filterFilter',function ObjectArrayCtrl($scope,filterFilter) {
// Fruits
$scope.fruits = [
{ name: 'apple',selected: true },{ name: 'orange',selected: false },{ name: 'pear',{ name: 'naartjie',selected: false }
];
// Selected fruits
$scope.selection = [];
// Helper method to get selected fruits
$scope.selectedFruits = function selectedFruits() {
return filterFilter($scope.fruits,{ selected: true });
};
// Watch fruits for changes
$scope.$watch('fruits|filter:{selected:true}',function (nv) {
$scope.selection = nv.map(function (fruit) {
return fruit.name;
});
},true);
}]);
