我试图使用 AngularJS 提供一个可切换的下拉列表,其中选择各种选项将触发不同的列表。ng-switch
似乎是正确的方法,但我的ng-model
在内部时不具有约束力ng-switch
。如果我不使用,绑定工作正常ng-switch
,但如果是这种情况,我不知道如何切换我的下拉列表。这里可能有什么问题?
js小提琴:http://jsfiddle.net/tanweihao88/LUzXT/3/ http://jsfiddle.net/tanweihao88/LUzXT/3/
HTML:
<select ng-model="periodRangeModel" ng-options="item for item in items"></select>
<div ng-switch on="periodRangeModel">
<span ng-switch-when="Month"><period-selector items="monthOptions" ng-model="periodModel"></period-selector></span>
<span ng-switch-when="Quarter"><period-selector items="quarterOptions" ng-model="periodModel"></period-selector></span>
<br>
</div>
JS:
angular.module('myApp', [])
.controller("MyCtrl", function($scope) {
$scope.items = ['Month', 'Quarter'];
$scope.periodRangeModel = "Month";
$scope.quarterOptions = ["Jan-Mar", "Apr-Jun", "Jul-Sept", "Oct-Dec"];
$scope.monthOptions = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
$scope.periodModel = $scope.monthOptions[0];
})
.directive('periodSelector', function() {
return {
restrict: 'E',
replace: true,
scope: { items: '=', ngModel: '='},
template: "<span><select ng-options='period for period in items' ng-model='ngModel'></select></span>"
}
});