参见示例 – http://plnkr.co/edit/RtidzgiUI7ZAMOTu3XHy?p=preview

CONTROLLER

var app = angular.module('StockCategory',[]);
 
app.controller('stockCategoryController',function($scope) {
  $scope.testing = 'World';
 
  $scope.saveCategory = function() {
 
    alert('hello');
  }
});

HTML

<div class="stock-categories" ng-app="StockCategory" ng-controller="stockCategoryController">
    <button class="btn save-cat" id="{{testing}}" ng-­click="saveCategory();">Save</button>
  </div>