我有一个tableView方法，该方法允许用户编辑行条目。但是，当我第二次编辑行条目时，出现索引超出范围错误。
正如您在第679行中所看到的那样（来自图像链接），由于超出范围的索引而导致了致命错误。当我将鼠标悬停在'split'关键字上时，xCode表示有7个值（0-6）。但是我知道应该有8个，因为如果您查看调试窗口并计算2个冒号分隔符之间的字符串，您将获得8个值（0-7）。
如果将光标悬停在676行上（来自图像链接），split [5]，则字符串值中似乎只有两个数字（双零）。双零之一应在split [6]中，并且split [6]当前具有应被split [7]的值。 Split [7]应该具有语言字符串的名称时未分配任何值，因此不在索引范围内。
我添加了第671-672行，以防它有所帮助，但没有影响。
func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
let delete = UIContextualAction(style: .destructive, title: "Delete") {
(action, sourceView, completionHandler) in
if let defaults = UserDefaults(suiteName: "group.co.uk.tirnaelectronics.hyperpolyglot.todayview") {
if var savedWords = defaults.object(forKey: "words") as? [String] {
var savedWordIndex = 0
for savedWord in savedWords {
if savedWord.contains(self.tableViewWords[indexPath.row]) {
savedWords.remove(at: savedWordIndex)
}
savedWordIndex += 1
}
self.words.removeAll()
self.words = savedWords
self.saveWords()
}
}
self.tableViewWords.remove(at: indexPath.row)
tableView.beginUpdates()
tableView.deleteRows(at: [indexPath], with: .left)
tableView.endUpdates()
// delete item at indexPath
self.resetEnableDisable()
self.chosenLanguageLoad()
self.clearEnableDisable()
self.chosenLanguageLoad()
self.sortEnableDisable()
completionHandler(true)
}
let edit = UIContextualAction(style: .normal, title: "Edit") {
(action, sourceView, completionHandler) in
let ac = UIAlertController(title: "Edit word", message: nil, preferredStyle: .alert)
// add two text fields, one for English and one for foreign word
ac.addTextField { textField in
let tableViewWord = self.tableViewWords[indexPath.row]
let split = tableViewWord.components(separatedBy: "::")
let englishWord = split[0]
textField.placeholder = "\(englishWord)"
}
ac.addTextField { (textField) in
let tableViewWord = self.tableViewWords[indexPath.row]
let split = tableViewWord.components(separatedBy: "::")
let foreignWord = split[1]
textField.placeholder = "\(foreignWord)"
}
// create an "Edit Word" button that submits the user's input
let submitAction = UIAlertAction(title: "Edit Word", style: .default) { [unowned self, ac] (action: UIAlertAction!) in
// pull out the English and foreign words, or an empty string if there was a problem
let firstWord = ac.textFields?[0].text?.capitalized ?? ""
let secondWord = ac.textFields?[1].text?.capitalized ?? ""
guard firstWord.count > 0 && secondWord.count > 0 else { return }
// edit item at indexPath
let split = self.tableViewWords[indexPath.row].components(separatedBy: "::")
_ = split[0]
_ = split[1]
let wrongCount = split[2]
let homeworkWrongCount = split[3]
let attemptCount = split[4]
let homeworkAttemptCount = split[5]
let homeworkSet = split[6]
// Line 677: Thread 1: Fatal Error: Index out of range when an edited word is re-edited.
let language = split[7]
self.editDefaultsKey(englishWord: firstWord, foreignWord: secondWord, wrongCount: wrongCount, homeworkWrongCount: homeworkWrongCount, attemptCount: attemptCount, homeworkAttemptCount: homeworkAttemptCount, homeworkSet: homeworkSet, language: language, index: indexPath.row)
self.tableViewWords.remove(at: indexPath.row)
self.tableViewWords.insert("\(firstWord)::\(secondWord)::\(wrongCount)::\(homeworkWrongCount)::\(attemptCount)::\(homeworkAttemptCount)\(homeworkSet)::\(language)", at: indexPath.row)
tableView.beginUpdates()
tableView.deleteRows(at: [indexPath], with: .automatic)
tableView.insertRows(at: [indexPath], with: .automatic)
tableView.endUpdates()
self.chosenLanguageLoad()
self.resetEnableDisable()
self.clearEnableDisable()
self.sortEnableDisable()
}
// add the submit action, plus a cancel button
ac.addAction(submitAction)
ac.addAction(UIAlertAction(title: "Cancel", style: .cancel))
// present the alert controller to the user
self.present(ac, animated: true)
completionHandler(true)
}
let homework = UIContextualAction(style: .normal, title: "Homework") {
(action, sourceView, completionHandler) in
let tableViewWord = self.tableViewWords[indexPath.row]
print("words in tableView editActionsForRowAt in WordsViewController are: \(self.words)")
let split = tableViewWord.components(separatedBy: "::")
if split[6] == "0" {
let firstWord = split[0]
let secondWord = split[1]
let wrongCount = split[2]
let homeworkWrongCount = split[3]
let attemptCount = split[4]
let homeworkAttemptCount = split[5]
let homeworkSet = "1"
let language = split[7]
self.editDefaultsKey(englishWord: firstWord, foreignWord: secondWord, wrongCount: wrongCount, homeworkWrongCount: homeworkWrongCount, attemptCount: attemptCount, homeworkAttemptCount: homeworkAttemptCount, homeworkSet: homeworkSet, language: language, index: indexPath.row)
self.tableViewWords.remove(at: indexPath.row)
self.tableViewWords.insert("\(firstWord)"+"::"+"\(secondWord)"+"::"+"\(wrongCount)"+"::"+"\(homeworkWrongCount)"+"::"+"\(attemptCount)"+"::"+"\(homeworkAttemptCount)"+"::"+"\(homeworkSet)"+"::"+"\(language)", at: indexPath.row)
print("Homework set button tapped")
} else {
let firstWord = split[0]
let secondWord = split[1]
let wrongCount = split[2]
let homeworkWrongCount = split[3]
let attemptCount = split[4]
let homeworkAttemptCount = split[5]
let homeworkSet = "0"
let language = split[7]
self.editDefaultsKey(englishWord: firstWord, foreignWord: secondWord, wrongCount: wrongCount, homeworkWrongCount: homeworkWrongCount, attemptCount: attemptCount, homeworkAttemptCount: homeworkAttemptCount, homeworkSet: homeworkSet, language: language, index: indexPath.row)
self.tableViewWords.remove(at: indexPath.row)
self.tableViewWords.insert("\(firstWord)"+"::"+"\(secondWord)"+"::"+"\(wrongCount)"+"::"+"\(homeworkWrongCount)"+"::"+"\(attemptCount)"+"::"+"\(homeworkAttemptCount)"+"::"+"\(homeworkSet)"+"::"+"\(language)", at: indexPath.row)
print("Homework unset button tapped")
}
completionHandler(true)
}
delete.backgroundColor = UIColor.systemRed
edit.backgroundColor = UIColor.systemBlue
homework.backgroundColor = UIColor.systemGreen
let swipeConfiguration = UISwipeActionsConfiguration(actions: [delete, edit, homework])
return swipeConfiguration
}
我希望：split[0] = "firstWord"
split[1] = "secondWord"
split[2] = "0"
split[3] = "0"
split[4] = "0"
split[5] = "0"
split[6] = "0"
split[7] = "italian"
但我得到：split[0] = "firstWord"
split[1] = "secondWord"
split[2] = "0"
split[3] = "0"
split[4] = "0"
split[5] = "00"
split[6] = "italian"
split[7] = no value (Thread 1: fatal error: index out of range)
答案 0 :(得分：0)
似乎这只是一个解析问题，缺少::。尝试更换它：
self.tableViewWords.insert("\(firstWord)::\(secondWord)::\(wrongCount)::\(homeworkWrongCount)::\(attemptCount)::\(homeworkAttemptCount)\(homeworkSet)::\(language)", at: indexPath.row)
与此：
self.tableViewWords.insert("\(firstWord)::\(secondWord)::\(wrongCount)::\(homeworkWrongCount)::\(attemptCount)::\(homeworkAttemptCount)::\(homeworkSet)::\(language)", at: indexPath.row)