AngularJs不会使用umbraco插件调用控制器

Question

我是AngularJS的新手。我正在尝试在textarea中为字符限制做一个Umbraco插件但是我在调​​用控制器中的函数时遇到问题。我的控制器是

angular.module("umbraco").controller("Example.CharLimitController", function ($scope) {
        alert("0");
        $scope.limitchars = function () {
            alert("1");
            var limit = 30;

            if ($scope.module.value.length > limit) {
                $scope.info = 'You cannot write more than ' + (limit) + ' Characters ';
                $scope.module.value = $scope.module.value.substr(0, limit);
            }
            else
            { $scope.info = 'You have ' + (limit - $scope.model.value.length) + ' Characters left';}
        }

    }); 

而我正打电话给控制器

<div ng-controller="Example.CharLimitController">
<textarea cols="10" ng-model="model.value" ng-change="limitchars"></textarea>
    <br/>
    <span ng-bind="info"></span>
</div>

当我正在加载页面时显示警报（0）但是在更改textarea警报（1）时，不显示警报（1），也不显示任何内容。

请帮忙

Answer 1

angular.module("umbraco", []).controller("Example.CharLimitController", ['$scope', function($scope) {
  $scope.limitchars = function() {
    var limit = 3;
    if ($scope.model.value.length > limit) {
      $scope.info = 'You cannot write more than ' + (limit) + ' Characters ';
      $scope.model.value = $scope.model.value.substr(0, limit);
    } else {
      $scope.info = 'You have ' + (limit - $scope.model.value.length) + ' Characters left';
    }
  }

}]);

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.7.4/angular.min.js"></script>
<div ng-app="umbraco">
  <div ng-controller="Example.CharLimitController"> <textarea cols="10" ng-model="model.value" ng-change="limitchars()"></textarea> <br/> <span ng-bind="info"></span> </div>
</div>

Answer 2

ng更改的语法是：

ng-change =limitChars()

我在构造函数中看不到任何模型对象。

你能把它改成模型并检查吗？

<div ng-controller="Example.CharLimitController">
 <textarea cols="10" ng-model="model" ng-change="limitchars()"></textarea>
    <br/>
 <span ng-bind="info"></span>
</div>