ng-repeat在bootstrap模式中没有更新

Question

我只需要一个简单的数组，然后添加更多按钮，我只需将另一个对象推送到该数组。 数组是ng-repeat，它呈现所有字段。我的代码如下。

<div ng-init="core.iv=[{email:'',name:''}];">
  <div ng-repeat="n in core.iv track by $index">
    <div class="col-sm-6 pad0">
      <div class="form-group">
        <input type="email" class="form-control mIn" ng-model="n.email" placeholder="Email id" />
        <span class="bar"></span>
      </div>
    </div>
    <div class="col-sm-6 pad0">
      <div class="form-group">
        <input type="text" class="form-control mIn" ng-model="n.name" placeholder="Name" />
        <span class="bar"></span>
      </div>
    </div>
  </div>
  <div class="col-xs-12 pad0 text-right">
    <button class="btn btn-t-primary btn-sm" ng- click="core.iv.push({email:'',name:''});">add more</button>
  </div>
</div>