angularjs – 用textarea和键盘显示离子模态的正确方法

HTML

<script id="new-post.html" type="text/ng-template">
  <div class="modal">
    <form ng-submit="sendPost(post)">
      <ion-header-bar class="bar-royal">
          <button class="button button-clear button-light" ng-click="closeNewPost()">Cancel</button>
          <h1 class="title">New Message</h1>
          <button type="submit" class="button button-clear">Post</button>          
      </ion-header-bar>
      <ion-content>

          <div class="list">
            <label class="item item-input">
              <textarea class="textareas" id="postMessageInput" ng-model="$parent.post.message" placeholder="What do you want to say?"  autofocus ></textarea>
            </label>
          </div>
      </ion-content>
    </form>
  </div>

控制器：

$ionicModal.fromTemplateUrl('new-post.html',function(modal) {
    $scope.postModal = modal;
},{
   scope: $scope,focusFirstInput: true
});
$scope.newPost = function() {
    $scope.postModal.show().then(document.getElementById('postMessageInput').focus());    
};

会发生的是模态首先向上滑动,然后键盘向上滑动.当模态首次显示时,屏幕有时闪烁.整个经历根本不顺利.有时,textarea甚至被推到模态标题下.

理想情况下,我希望模式使用已在视图上呈现的键盘向上滑动,就好像键盘嵌入到模态中一样.这就是其他应用程序(ios)的工作原理.这是可能的,还是有标准方法用键盘和textarea显示模态？