angularjs - 创建更新 ng-model 的 angular-js 指令

Question

我正在尝试创建一个包装 twitter typeahead 插件的指令。到目前为止我所拥有的是:

HTML:

<input ng-twitter-typeahead type="text" ng-model="participant" data="exampleData" />
{{ participant }}

当我在预输入中选择某些内容时，我希望更新“参与者”的值。预输入本身工作正常，但我无法捕获所选值。下面是 JavaScript:

var app = angular.module('myApp', [])
app.directive('ngTwitterTypeahead', function () {
  return {
    restrict: 'EA',
    scope: {
      data: '='
    },
    link: function ($scope, $element, $attrs) {
      $element.typeahead($scope.data);

      $element.bind('typeahead:selected', function(obj, datum) {        
         // I really don't know how to do this part
         // the variable 'datum' is what I want to be passed to ng-model
         // I tried things like:
            // Including the ngModelController and typing:
            // ngModel.$setViewValue(datum)
            // but that didn't work.
     }
  };
});

当谈到 AngularJS 时，我显然错过了一些基本的东西。任何帮助将不胜感激!

编辑**

我找到了解决方案。我有时很无知:

angular.module('siyfion.ngTypeahead', [])
  .directive('ngTypeahead', function () {
    return {
    restrict: 'C',
    scope: {
      datasets: '=',
  ngModel: '='
    },
    link: function ($scope, $element, $attrs) {
      $element.typeahead($scope.datasets);      

      $element.bind('typeahead:selected', function(obj, datum) {        
    $scope.$apply(function() {
     $scope.ngModel = datum;
    });
  })            
    }
  };
});

Answer 1

您可以在指令中要求 ngModel Controller 。它将使您能够访问 link 函数内的模型 Controller ，请参阅 http://docs.angularjs.org/api/ng.directive:ngModel.NgModelController

在这里您可以找到如何在现实生活中使用它的示例 http://suhairhassan.com/2013/05/01/getting-started-with-angularjs-directive.html#.UhSdDOZdXUE