使用searchdisplaycontroller swift2在tableview中搜索时键盘卡住了

Question

当我输入任何字符或单词时，键盘会卡住一段时间

这是代码

  func updateSearchResultsForSearchController(searchController: UISearchController) {
    menuView.hidden = true
    searchStr = searchController.searchBar.text
    temp = 1

    if searchStr != ""
    {
      calledYoutubeAPI()
    }
    else
    {
      flag = 11
      noticeView.removeFromSuperview()
      tableView.reloadData()
    }

    let searchPredicate = NSPredicate(format: "SELF CONTAINS[cd] %@",searchStr)
    let arr = (videoName as NSArray).filteredArrayUsingPredicate(searchPredicate)
    self.videoName = arr as! [String]

        self.tableView.reloadData()
}


    func searchBar_Intialization()
{

    if flag == 0
    {
        self.resultSearchController = UISearchController(searchResultsController: nil)
        self.resultSearchController.dimsBackgroundDuringPresentation = false
        self.resultSearchController.searchBar.sizeToFit()
        self.resultSearchController.searchResultsUpdater = self
        self.resultSearchController.delegate = self
        self.resultSearchController.searchBar.placeholder = "Search Youtube & Library"
        self.resultSearchController.searchBar.searchBarStyle = UISearchBarStyle.Minimal
        self.tableView.tableHeaderView = self.resultSearchController.searchBar
        //self.edgesForExtendedLayout = UIRectEdge.None;
        self.tableView.reloadData()
    }

}

这里是类似的问题keyboard stuck when searching in uitableview using uisearchbar...?