我有一个包含值的下拉菜单，我正在使用下拉框来显示项目。我想处理单击事件并打印数组中元素的索引。查看代码如下:
<!DOCTYPE html>
<html ng-app="myApp">
<head>
<link data-require="bootstrap-css@3.3.6" data-semver="3.3.6" rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.css" />
<link data-require="font-awesome@4.5.0" data-semver="4.5.0" rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.css" />
<script data-require="jquery@*" data-semver="2.1.4" src="https://code.jquery.com/jquery-2.1.4.js"></script>
<script data-require="bootstrap@*" data-semver="3.3.6" src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"> </script>
<script data-require="angular.js@1.4.7" data-semver="1.4.7" src="https://code.angularjs.org/1.4.7/angular.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="script.js"></script>
</head>
<body ng-controller="myController">
<select ng-options="item for item in items" ng-model="item" ng-change="handleClick($index)">
</select>
</html>
在 Controller 上我有该功能，但我没有在选择时获取索引。
// Code goes here
angular.module("myApp", []).
controller("myController", function($scope){
$scope.handleClick = function(index){
console.log("came inside the handleClick function with the currext index "+index);
}
$scope.items=["pradeep","praveen", "sagar","vinod"];
})
请让我知道我哪里出错了。链接到 Plunkr - Link to Plnkr
最佳答案
使用 ngOptions 时未定义
$index - 最好的选择是使用 indexOf 并查找索引:
<select ng-options="item for item in items" ng-model="selectedItem" ng-change="handleClick(selectedItem)">
还有 JS:
$scope.handleClick = function(selectedItem) {
var index = $scope.items.indexOf(selectedItem);
}
关于angularjs - 无法获取 AngularJs 中所选项目的索引，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/34635075/