Question

我有一个tableview，列出了与游戏相关的人。当玩家被淘汰时，我会运行以下代码：

func doRemovePlayer(playerDed: GKPlayer) {

    print("\n ** Removing \(playerDed.alias!) from the game! ** \n")
    gameLog += "Removing \(playerDed.alias!) from the game!"
    let elIndex = (gKPlayerArray.index(of: playerDed))!
    scoreArray.remove(at: elIndex)
    randomNoArray.remove(at: elIndex)
    timeResultsArray.remove(at: elIndex)
    answerResultArray.remove(at: elIndex)
    playersReadyForNextStage.remove(at: elIndex)
    gKPlayerArray.remove(at: elIndex)
    noOfPlayers -= 1
    print ("New Array counts are: \(scoreArray.count), \(randomNoArray.count), \(timeResultsArray.count), \(answerResultArray.count), \(playersReadyForNextStage.count), \(gKPlayerArray.count), Players: \(noOfPlayers)")
    DispatchQueue.main.asyncAfter(deadline: .now() + 0.01, execute: {
        self.scoreBoardTable.reloadData()
    })
    checkIfWinnerOrLoser()
}

正如您所看到的，我只是为了避免任何问题而执行调度队列（我认为）。无论如何，当我在2个模拟器和我的实际iPhone上运行此代码时，模拟器没有此代码的问题，但iPhone 3/4次给了我一个致命错误：索引超出范围并指向此特定行在代码中：

extension GameScreenVC: UITableViewDelegate, UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return gKPlayerArray.count
    }

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let scoreCell = tableView.dequeueReusableCell(withIdentifier: "playerCell") as! ScoreBoardTableCell
    **scoreCell.nameLabel.text = gKPlayerArray[indexPath.row].alias!** //FATAL ERROR: INDEX OUT OF RANGE
    scoreCell.scoreLabel.text = String(scoreArray[indexPath.row])
    if indexPath.row == 0 {
        scoreCell.layer.borderWidth = 3
        scoreCell.layer.borderColor = UIColor.blue.cgColor
    } else {
        scoreCell.layer.borderWidth = 0
    }
    scoreCell.statusLabel.layer.cornerRadius = 7
    if playersReadyForNextStage[indexPath.row] {
        scoreCell.statusLabel.layer.backgroundColor = UIColor.yellow.cgColor
    } else {
        scoreCell.statusLabel.layer.backgroundColor = UIColor.green.cgColor
    }
    return scoreCell
}

我不确定如何解决这个问题。我做“打印”所有数组的新值以防万一，我确认它们都是正确的（现在它们是2，它们是2）。然后，当它运行表的更新时，它会崩溃，认为indexPath.row中有第3个元素？（我认为这是发生的事情）。 IndexPath.row是不是更新了什么？有没有办法更正确地更新它？

Answer 1

如果在主线程上调用doRemovePlayer，则您没有理由稍后调度重新加载。试试这个：

func doRemovePlayer(playerDed: GKPlayer) {

    print("\n ** Removing \(playerDed.alias!) from the game! ** \n")
    gameLog += "Removing \(playerDed.alias!) from the game!"
    let elIndex = (gKPlayerArray.index(of: playerDed))!
    scoreArray.remove(at: elIndex)
    randomNoArray.remove(at: elIndex)
    timeResultsArray.remove(at: elIndex)
    answerResultArray.remove(at: elIndex)
    playersReadyForNextStage.remove(at: elIndex)
    gKPlayerArray.remove(at: elIndex)
    noOfPlayers -= 1
    print ("New Array counts are: \(scoreArray.count), \(randomNoArray.count), \(timeResultsArray.count), \(answerResultArray.count), \(playersReadyForNextStage.count), \(gKPlayerArray.count), Players: \(noOfPlayers)")
    // it should be enough to delete the corresponding row
    scoreBoardTable.deleteRows(at: [IndexPath(row: elIndex, section: 0)], with: .automatic)
    checkIfWinnerOrLoser()
}

UITableView：IndexPath.row超出范围（FATAL ERROR）

1 个答案: