Question

我正在创建一个活动应用，其中UITableView中列出了数千名参与者。该过程应该是checkIn（通过点击按钮）2个或更多参与者，并拉动刷新。 “拉入刷新”成功执行，但是当我尝试拉入/向上滚动数据时，它崩溃并显示Thread 1: Fatal error: Index out of range。希望您能有所帮助，因为我尝试在SO中使用解决方案，但仍无法正常工作。谢谢。

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    return cellHeights[indexPath.row]
}

UIRefreshControl代码

var refresher: UIRefreshControl!

 override func viewDidLoad() {
    super.viewDidLoad()

    createCellHeightsArray()

    refresher = UIRefreshControl()
    refresher.attributedTitle = NSAttributedString(string: "Pull to refresh")
    refresher.addTarget(self, action: #selector(ParticipantsViewController.refresh), for: UIControlEvents.valueChanged)
    ParticipantTableView.addSubview(refresher)

    countNotif()
    getData()

}

  @objc func refresh() {
    countNotif()
    getParticipants()
    refresher.endRefreshing()
    ParticipantTableView.reloadData()
   }
  func getData() {
    getParticipants()

    if let posts = participants {
        self.participants = posts
    } else {
    self.participants.removeAll()
}
    self.refresh()
}

cellHeightArray

  func createCellHeightsArray() {

    cellHeights.removeAll()

    if searchController.isActive && searchController.searchBar.text != "" {
        for _ in 0...filteredParticipants.count {
            cellHeights.append(kCloseCellHeight)
        }
    }else {
        for _ in 0...participants.count {
            cellHeights.append(kCloseCellHeight)
        }
    }
}

 func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {

    guard case let cell as ParticipantCell = cell else {
        return
    }

    cell.backgroundColor = UIColor.clear

    if searchController.isActive && searchController.searchBar.text != "" {
        cell.participant = filteredParticipants[indexPath.row]
    }else {
        cell.participant = participants[indexPath.row]
    }

    if cellHeights[(indexPath as NSIndexPath).row] == kCloseCellHeight {
        cell.unfold(false, animated: false, completion: nil)
    } else {
        cell.unfold(true, animated: false, completion: nil)
    }
}

Answer 1

这应该有帮助

filteredParticipants.count-1或0..<unsortedStrings.count

0...participants.count-1或0..<participants.count

func createCellHeightsArray() {

    cellHeights.removeAll()

    if searchController.isActive && searchController.searchBar.text != "" {
        for _ in 0..<filteredParticipants.count {
            cellHeights.append(kCloseCellHeight)
        }
    }else {
        for _ in 0..<participants.count {
            cellHeights.append(kCloseCellHeight)
        }
    }
}

cellHeight：线程1：致命错误：在UITableView中提取数据时索引超出范围

1 个答案: