Question

这是在文本框更改事件中调用的控制器代码：

$scope.doAutoCompleteType = function() {
    $scope.suggestedItems.length = 0;
    var text = $scope.searchText;
    console.log("=========>"+text);
}

这里是html代码：

<input type="text" placeholder="Type text.." ng-model="searchText" ng-change="doAutoCompleteType()">

问题是console.log("=========>"+text);正在打印undefined

Answer 1

试

$scope.doAutoCompleteType = function(text) {
    $scope.suggestedItems.length = 0;
    console.log("=========>"+text);
}


<input type="text" placeholder="Type text.." ng-model="searchText" ng-change="doAutoCompleteType(searchText)">

Answer 2

我没有发现您的代码有任何问题。你能发布更多代码吗？以下是ng-change的示例：

<body ng-app="changeExample">
 <script>
  angular.module('changeExample', [])
    .controller('ExampleController', ['$scope', function($scope) {
      $scope.change = function() {
        $scope.text2 = $scope.text;
        var print = $scope.text;
        console.log("***" + print);
      };
    }]);
</script>
<div ng-controller="ExampleController">
  <input type="text" ng-model="text" ng-change="change()" id="ng-change-example1" /><br/>
  <tt>text2 = {{text2}}</tt><br/>
</div>
</body>

http://plnkr.co/edit/LVQqCIBW3kGpN4bIzVwK?p=preview

Answer 3

它应该有一些拼写错误或父子范围问题，在下面的链接中被泄露

angularjs scope(the crux): parent child scope having model(with and without 'dot')

范围模型显示未定义的值

3 个答案: