如何在ng-repeat中访问子作用域

<div ng-controller="MyController">
  <div ng-repeat="item in items">
    <p>{{item.name}}</p>
    <button ng-click="increaseCount()">{{item.count}}</button>
  </div>
</div>

angular.module('myApp', [])
  .controller('MyController', function($scope) {
    $scope.items = [
      { name: 'Item 1', count: 0 },
      { name: 'Item 2', count: 0 },
      { name: 'Item 3', count: 0 }
    ];

    $scope.increaseCount = function() {
      // 在父级作用域中增加count的值
      this.item.count++;
    };
  });