我对此感到困惑。我无法在iOS的表格视图中选择任何行。表格视图滚动很好。我已经以编程方式设置了可能影响此问题的所有属性。
这是我的代码：
tableView.dataSource = self
tableView.delegate = self
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 44
tableView.allowsSelection = true
tableView.isUserInteractionEnabled = true
class MessageTableViewCell: UITableViewCell {
@IBOutlet weak var labelTitle: UILabel!
@IBOutlet weak var textViewBody: UITextView!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
self.isUserInteractionEnabled = true
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
更新：
我能够选择一行-最后一行。然后我不再允许我再次选择任何行。
这是我的整个课堂，不包括导入语句：
class CreateMessagesViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var viewControls: UIView!
@IBOutlet weak var toolbarCopyMessage: UIToolbar!
@IBOutlet weak var barButtonCopyMessage: UIBarButtonItem!
@IBOutlet weak var labelTitle: UILabel!
@IBOutlet weak var textFieldTitle: UITextField!
@IBOutlet weak var labelBody: UILabel!
@IBOutlet weak var textViewBody: UITextView!
@IBOutlet weak var toolbarCreateMessage: UIToolbar!
@IBOutlet weak var barButtonCreateMessage: UIBarButtonItem!
@IBOutlet var bottomLayoutConstraint: NSLayoutConstraint!
let privateDatabase = CKContainer.default().privateCloudDatabase
var messages = [UTIMessage]()
// MARK: - View
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
tableView.dataSource = self
tableView.delegate = self
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 44
tableView.allowsSelection = true
tableView.isUserInteractionEnabled = true
let predicate = NSPredicate(value: true)
let query = CKQuery(recordType: DatabaseNameStrings.recordTypeMessage, predicate: predicate)
privateDatabase.perform(query, inZoneWith: nil) {
records, error in
if error != nil {
print(error!.localizedDescription)
} else {
for record in records! {
let utiMessage = UTIMessage(ckRecord: record)
self.messages.append(utiMessage)
}
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
let defaultCenter = NotificationCenter.default
defaultCenter.addObserver(self, selector: #selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
defaultCenter.addObserver(self, selector: #selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
defaultCenter.addObserver(self, selector: #selector(self.keyboardDidHide), name: NSNotification.Name.UIKeyboardDidHide, object: nil)
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
let defaultCenter = NotificationCenter.default
defaultCenter.removeObserver(self)
}
// MARK: - Actions
@IBAction func actionDone(_ sender: UIBarButtonItem) {
dismiss(animated: true, completion: nil)
}
@IBAction func actionCopyMessage(_ sender: UIBarButtonItem) {
guard let indexPathForSelectedRow = tableView.indexPathForSelectedRow else {
let alertMessage = "You must select a message from the list."
let alert = UIAlertController(title: nil, message: alertMessage, preferredStyle: .alert)
let actionOK = UIAlertAction(title: "OK", style: .cancel, handler: nil)
alert.addAction(actionOK)
present(alert, animated: true, completion: nil)
return
}
let message = messages[indexPathForSelectedRow.row]
textFieldTitle.text = message.title
textViewBody.text = message.body
}
@IBAction func actionCreateMessage(_ sender: UIBarButtonItem) {
guard let messageTitle = textFieldTitle.text else {
let alertMessage = "You must enter a title for the message."
let alert = UIAlertController(title: nil, message: alertMessage, preferredStyle: .alert)
let actionOK = UIAlertAction(title: "OK", style: .cancel, handler: nil)
alert.addAction(actionOK)
present(alert, animated: true, completion: nil)
return
}
guard let messageBody = textViewBody.text else {
let alertMessage = "You must enter a message body."
let alert = UIAlertController(title: nil, message: alertMessage, preferredStyle: .alert)
let actionOK = UIAlertAction(title: "OK", style: .cancel, handler: nil)
alert.addAction(actionOK)
present(alert, animated: true, completion: nil)
return
}
let newCKRecordMessage = CKRecord(recordType: DatabaseNameStrings.recordTypeMessage)
newCKRecordMessage.setObject(messageTitle as CKRecordValue, forKey: DatabaseNameStrings.fieldNameTitle)
newCKRecordMessage.setObject(messageBody as CKRecordValue, forKey: DatabaseNameStrings.fieldNameBody)
privateDatabase.save(newCKRecordMessage) {
record, error in
if error != nil {
print("Error saving record:", error!.localizedDescription)
} else {
print("Record saved successfully.")
}
}
let newUTIMessage = UTIMessage(ckRecord: newCKRecordMessage)
messages.append(newUTIMessage)
let indexPathNewMessage = IndexPath(row: messages.count - 1, section: 0)
tableView.insertRows(at: [indexPathNewMessage], with: .automatic)
textFieldTitle.text = nil
textViewBody.text = nil
textFieldTitle.resignFirstResponder()
textViewBody.resignFirstResponder()
}
@IBAction func selectRow(_ sender: Any) {
let indexPath = IndexPath(row: 0, section: 0)
tableView.selectRow(at: indexPath, animated: true, scrollPosition: .top)
}
// MARK: - Keyboard
@objc func keyboardWillShow(_ sender: Notification) {
print("keyboardWillShow(_:)")
let keyboardSize = (sender.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
var offset = keyboardSize.height
if offset > keyboardSize.height {
offset = keyboardSize.height
}
self.bottomLayoutConstraint.isActive = false
self.bottomLayoutConstraint = NSLayoutConstraint(item: view, attribute: .bottom, relatedBy: .equal, toItem: viewControls, attribute: .bottom, multiplier: 1, constant: offset + 4)
self.bottomLayoutConstraint.isActive = true
print("\ty: \(self.view.frame.origin.y)")
}
@objc func keyboardWillHide(_ sender: Notification) {
print("keyboardWillHide(_:)")
self.bottomLayoutConstraint.isActive = false
self.bottomLayoutConstraint = NSLayoutConstraint(item: view, attribute: .bottom, relatedBy: .equal, toItem: viewControls, attribute: .bottom, multiplier: 1, constant: 4)
self.bottomLayoutConstraint.isActive = true
}
@objc func keyboardDidHide(_ sender: Notification) {
print("keyboardDidHide(_:)")
textFieldTitle.resignFirstResponder()
textViewBody.resignFirstResponder()
}
}
// MARK: - UITableViewDataSource
extension CreateMessagesViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return messages.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "messageCell", for: indexPath) as! MessageTableViewCell
let message = messages[indexPath.row]
cell.labelTitle.text = message.title
cell.textViewBody.text = message.body
return cell
}
}
// MARK: - UITableViewDelegate
extension CreateMessagesViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("didSelectRowAt")
}
}
答案 0 :(得分：0)
我修复了它。文本视图没有通过touchesBegan事件传递，因此我将文本字段的class属性设置为具有以下定义的自定义类：
class TextViewWithTouches: UITextView {
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)
next?.touchesBegan(touches, with: event)
}
override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesMoved(touches, with: event)
next?.touchesMoved(touches, with: event)
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesEnded(touches, with: event)
next?.touchesEnded(touches, with: event)
}
override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesCancelled(touches, with: event)
next?.touchesCancelled(touches, with: event)
}
}