AngularJS 1.0案例 取消全选

<section class="container" ng-controller="C18">
  <table class='table table-bordered'>
    <thead>
      <tr>
        <th>选择</th>
        <th>姓名</th>
        <th>工资</th>
        <th>操作</th>
      </tr>
    </thead>
      <tbody>
        <tr ng-repeat="item in employee">
          <td><input type='checkbox' ng-checked="selectAll"></td>
          <td ng-bind="item.name">Sunny</td>
          <td ng-bind="item.salary">8500</td>
          <td><button class='btn btn-danger'>删除</button></td>
        </tr>
      </tbody>
  </table>
  <input type="checkbox" ng-model="selectAll">
  <span ng-hide='selectAll'>全选</span>
  <span ng-show='selectAll'>取消全选</span>
</section>
<script src="js/jquery-1.11.3.js"></script>
<script src="js/angular.js"></script>
<script>
angular.module('M18', ['ng']).
  controller('C18', function($scope){
    $scope.employee = [{
      name: 'Sunny',
      salary: 7200
    },{
      name: 'Tom',
      salary: 6400
    },{
      name: 'Jerry',
      salary: 7800
    }]
    $scope.selectAll = false;
  })
</script>