[英]tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) Doesn't work when I add a UITapGestureRecognizer to my custom UITableViewCell
我手头有一个非常原始的问题，那就是当我在自定义单元格中添加了轻击手势识别器时，我无法调用didSelectRowAt方法。
我的代码如下：
import UIKit
class LanguageViewController: UIViewController {
@IBOutlet weak var titleLabel: AvenirUILabel!
@IBOutlet weak var backButton: UIButton!
@IBOutlet weak var submitButton: PinkUIButton!
@IBOutlet weak var addLanguageButton: UIButton!
@IBOutlet weak var addAnotherLanguageLabel: UILabel!
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var tableViewHeightConstraint: NSLayoutConstraint!
var numberOfLanguagesSpoken = 2
var pickersStartHeight: CGFloat!
let downArrowImage = UIImage(named: "arrow_drop_down")
let BGColor = UIColor.white.withAlphaComponent(0.1)
var tag = 1001
var selectedCellHeight: CGFloat = 88.0
var unselectedCellHeight: CGFloat = 44.0
var selectedCellIndexPath: IndexPath?
let languages = ["Akan", "Amharic", "Arabic", "Assamese", "Awadhi", "Azerbaijani", "Balochi", "Belarusian", "Bengali", "Bhojpuri", "Burmese", "Cebuano", "Chewa", "Chhattisgarhi", "Chittagonian", "Czech", "Deccan", "Dhundhari", "Dutch", "Eastern Min", "English", "French", "Fula", "Gan Chinese", "German", "Greek", "Gujarati", "Haitian Creole", "Hakka", "Haryanvi", "Hausa", "Hiligaynon/Ilonggo", "Hindi ", "Hmong", "Hungarian", "Igbo", "Ilocano", "Italian", "Japanese", "Javanese", "Jin", "Kannada", "Kazakh", "Khmer", "Kinyarwanda", "Kirundi", "Konkani", "Korean", "Kurdish", "Madurese", "Magahi", "Maithili", "Malagasy", "Malay", "Malayalam", "Mandarin", "Marathi", "Marwari", "Mossi", "Nepali", "Northern Min", "Odia", "Oromo", "Pashto", "Persian", "Polish", "Portuguese", "Punjabi", "Quechua", "Romanian", "Russian", "Saraiki", "Serbo-Croatian", "Shona", "Sindhi", "Sinhalese", "Somali", "Southern Min", "Spanish", "Sundanese", "Swedish", "Sylheti", "Tagalog/Filipino", "Tamil", "Telugu", "Thai", "Turkish", "Turkmen", "Ukrainian", "Urdu", "Uyghur", "Uzbek", "Vietnamese", "Wu", "Xhosa", "Xiang ", "Yoruba", "Yue ", "Zhuang", "Zulu"]
var proficiency = ["Basic","Conversational","Proficient","Fluent","Native"]
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = backgroundTint
// initial set up
let height = self.view.bounds.height
titleLabel.textColor = .white
backButton.addTarget(self, action: #selector(goBack), for: .allTouchEvents)
tableView.dataSource = self
tableView.delegate = self
tableView.register(LanguageProficiencyTableViewCell.self, forCellReuseIdentifier: "Language")
tableView.backgroundColor = backgroundTint
tableView.allowsSelection = true
tableViewHeightConstraint.constant = 2*height/9
addLanguageButton.tintColor = .white
addLanguageButton.addTarget(self, action: #selector(addNewLanguage), for: .allTouchEvents)
addAnotherLanguageLabel.textColor = .white
submitButton.addTarget(self, action: #selector(submitChanges), for: .allEvents)
}
override func viewWillLayoutSubviews() {
unselectedCellHeight = self.view.bounds.height/9
selectedCellHeight = CGFloat(unselectedCellHeight * 2.0)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func goBack() {
self.dismiss(animated: true, completion: nil)
}
func submitChanges() {
self.dismiss(animated: true) {
//
}
}
func addNewLanguage() {
numberOfLanguagesSpoken += 1
UIView.animate(withDuration: 0.5) {
//
}
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
extension LanguageViewController: UITableViewDataSource, UITableViewDelegate {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return numberOfLanguagesSpoken
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Language", for: indexPath) as! LanguageProficiencyTableViewCell
cell.parentVC = self
cell.backgroundColor = .clear
cell.languages = self.languages
cell.proficiency = self.proficiency
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
if selectedCellIndexPath == indexPath {
return selectedCellHeight
} else {
return unselectedCellHeight
}
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
//
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if selectedCellIndexPath != nil && selectedCellIndexPath == indexPath as IndexPath {
selectedCellIndexPath = nil
} else {
selectedCellIndexPath = indexPath as IndexPath
}
tableView.beginUpdates()
tableView.endUpdates()
if selectedCellIndexPath != nil {
// This ensures, that the cell is fully visible once expanded
tableView.scrollToRow(at: indexPath as IndexPath, at: .none, animated: true)
}
}
func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? {
return indexPath
}
}
import UIKit
class LanguageProficiencyTableViewCell: UITableViewCell {
let languageLabel = IndentedTextUILabel()
var languagePicker = UIPickerView()
weak var parentVC: LanguageViewController!
var cellHeight: CGFloat = 80
var open = false
var languages = [""]
var proficiency = [""]
var pickedLanguage = ""
var pickedProficiency = ""
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
self.contentView.addSubview(languageLabel)
self.contentView.addSubview(languagePicker)
self.contentView.backgroundColor = .clear
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
}
override func layoutSubviews() {
let width = self.bounds.width
let height = cellHeight
let BGColor = UIColor.white.withAlphaComponent(0.1)
languageLabel.frame = CGRect(x: 0.0, y: 1.0, width: width, height: height - 1.0)
languageLabel.textColor = .white
languageLabel.backgroundColor = BGColor
languageLabel.text = "Language(Proficiency)"
languageLabel.leftInset = 25.0
let downArrow = UIButton()
let downArrowImage = UIImage(named: "arrow_drop_down")
downArrow.setImage(downArrowImage, for: .normal)
downArrow.center.y = height/2
downArrow.center.x = 4 * width/5
languageLabel.addSubview(downArrow)
let tap = UITapGestureRecognizer(target: self, action: #selector(cellTapped))
self.addGestureRecognizer(tap)
languagePicker.frame = CGRect(x: 0.0, y: self.cellHeight + 1.0, width: self.bounds.width, height: 0.0)
languagePicker.delegate = self
languagePicker.dataSource = self
languagePicker.backgroundColor = UIColor.white.withAlphaComponent(0.05)
languagePicker.selectRow(20, inComponent: 0, animated: true)
let backGroundView = UIView(frame: CGRect(x: 0.0, y: 1.0, width: width, height: height - 1.0))
backGroundView.backgroundColor = .clear
self.selectedBackgroundView = backGroundView
}
func cellTapped() {
UIView.animate(withDuration: 0.2, animations: {
if !self.open {
self.languagePicker.frame.size.height = self.cellHeight - 2.0
} else {
self.languagePicker.isHidden = true
}
}, completion: { (_) in
if self.open {
self.languagePicker.frame.size.height = 0.0
self.languagePicker.isHidden = false
}
self.open = !self.open
})
}
}
这将不起作用，因为轻击手势会自己进行轻击，并且不会将轻击发送到其下方的视图。
您可以使点击手势将点击发送到以下位置：
mySwipeGesture.cancelsTouchesInView = false
如如何通过UISwipeGestureRecognizer将“ tap”传递到UIView下方的UIButton中所述？
另外，如果仅使用轻击手势来关闭键盘，则可以在tableView的didSelectAt方法中进行操作，并在使用该方法关闭键盘后执行其他操作。
我正在做类似您所做的事情，它正在为我工作。
设置单元格时，您不必在TableViewCell类内部添加手势识别器，而必须在Controller类中添加手势识别器。
像这样：
class LanguageViewController: UIViewController {
@IBOutlet weak var titleLabel: AvenirUILabel!
@IBOutlet weak var backButton: UIButton!
@IBOutlet weak var submitButton: PinkUIButton!
@IBOutlet weak var addLanguageButton: UIButton!
@IBOutlet weak var addAnotherLanguageLabel: UILabel!
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var tableViewHeightConstraint: NSLayoutConstraint!
var numberOfLanguagesSpoken = 2
var pickersStartHeight: CGFloat!
let downArrowImage = UIImage(named: "arrow_drop_down")
let BGColor = UIColor.white.withAlphaComponent(0.1)
var tag = 1001
var selectedCellHeight: CGFloat = 88.0
var unselectedCellHeight: CGFloat = 44.0
var selectedCellIndexPath: IndexPath?
let languages = ["Akan", "Amharic", "Arabic", "Assamese", "Awadhi", "Azerbaijani", "Balochi", "Belarusian", "Bengali", "Bhojpuri", "Burmese", "Cebuano", "Chewa", "Chhattisgarhi", "Chittagonian", "Czech", "Deccan", "Dhundhari", "Dutch", "Eastern Min", "English", "French", "Fula", "Gan Chinese", "German", "Greek", "Gujarati", "Haitian Creole", "Hakka", "Haryanvi", "Hausa", "Hiligaynon/Ilonggo", "Hindi ", "Hmong", "Hungarian", "Igbo", "Ilocano", "Italian", "Japanese", "Javanese", "Jin", "Kannada", "Kazakh", "Khmer", "Kinyarwanda", "Kirundi", "Konkani", "Korean", "Kurdish", "Madurese", "Magahi", "Maithili", "Malagasy", "Malay", "Malayalam", "Mandarin", "Marathi", "Marwari", "Mossi", "Nepali", "Northern Min", "Odia", "Oromo", "Pashto", "Persian", "Polish", "Portuguese", "Punjabi", "Quechua", "Romanian", "Russian", "Saraiki", "Serbo-Croatian", "Shona", "Sindhi", "Sinhalese", "Somali", "Southern Min", "Spanish", "Sundanese", "Swedish", "Sylheti", "Tagalog/Filipino", "Tamil", "Telugu", "Thai", "Turkish", "Turkmen", "Ukrainian", "Urdu", "Uyghur", "Uzbek", "Vietnamese", "Wu", "Xhosa", "Xiang ", "Yoruba", "Yue ", "Zhuang", "Zulu"]
var proficiency = ["Basic","Conversational","Proficient","Fluent","Native"]
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = backgroundTint
// initial set up
let height = self.view.bounds.height
titleLabel.textColor = .white
backButton.addTarget(self, action: #selector(goBack), for: .allTouchEvents)
tableView.dataSource = self
tableView.delegate = self
tableView.register(LanguageProficiencyTableViewCell.self, forCellReuseIdentifier: "Language")
tableView.backgroundColor = backgroundTint
tableView.allowsSelection = true
tableViewHeightConstraint.constant = 2*height/9
addLanguageButton.tintColor = .white
addLanguageButton.addTarget(self, action: #selector(addNewLanguage), for: .allTouchEvents)
addAnotherLanguageLabel.textColor = .white
submitButton.addTarget(self, action: #selector(submitChanges), for: .allEvents)
}
override func viewWillLayoutSubviews() {
unselectedCellHeight = self.view.bounds.height/9
selectedCellHeight = CGFloat(unselectedCellHeight * 2.0)
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func goBack() {
self.dismiss(animated: true, completion: nil)
}
func submitChanges() {
self.dismiss(animated: true) {
//
}
}
func addNewLanguage() {
numberOfLanguagesSpoken += 1
UIView.animate(withDuration: 0.5) {
//
}
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
extension LanguageViewController: UITableViewDataSource, UITableViewDelegate {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return numberOfLanguagesSpoken
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Language", for: indexPath) as! LanguageProficiencyTableViewCell
cell.parentVC = self
cell.backgroundColor = .clear
cell.languages = self.languages
cell.proficiency = self.proficiency
let tap = UITapGestureRecognizer(target: self, action: #selector("cellTapped:"))
cell.addGestureRecognizer(tap)
return cell
}
//Change here you can't call languagePicker with self but you have to get it from the object tapped that in your case is you cell
func cellTapped(recognizer: UITapGestureRecognizer) {
UIView.animate(withDuration: 0.2, animations: {
if !self.open {
self.languagePicker.frame.size.height = self.cellHeight - 2.0
} else {
self.languagePicker.isHidden = true
}
}, completion: { (_) in
if self.open {
self.languagePicker.frame.size.height = 0.0
self.languagePicker.isHidden = false
}
self.open = !self.open
})
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
if selectedCellIndexPath == indexPath {
return selectedCellHeight
} else {
return unselectedCellHeight
}
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
//
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if selectedCellIndexPath != nil && selectedCellIndexPath == indexPath as IndexPath {
selectedCellIndexPath = nil
} else {
selectedCellIndexPath = indexPath as IndexPath
}
tableView.beginUpdates()
tableView.endUpdates()
if selectedCellIndexPath != nil {
// This ensures, that the cell is fully visible once expanded
tableView.scrollToRow(at: indexPath as IndexPath, at: .none, animated: true)
}
}
func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? {
return indexPath
}
}
import UIKit
class LanguageProficiencyTableViewCell: UITableViewCell {
let languageLabel = IndentedTextUILabel()
var languagePicker = UIPickerView()
weak var parentVC: LanguageViewController!
var cellHeight: CGFloat = 80
var open = false
var languages = [""]
var proficiency = [""]
var pickedLanguage = ""
var pickedProficiency = ""
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
self.contentView.addSubview(languageLabel)
self.contentView.addSubview(languagePicker)
self.contentView.backgroundColor = .clear
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
}
override func layoutSubviews() {
let width = self.bounds.width
let height = cellHeight
let BGColor = UIColor.white.withAlphaComponent(0.1)
languageLabel.frame = CGRect(x: 0.0, y: 1.0, width: width, height: height - 1.0)
languageLabel.textColor = .white
languageLabel.backgroundColor = BGColor
languageLabel.text = "Language(Proficiency)"
languageLabel.leftInset = 25.0
let downArrow = UIButton()
let downArrowImage = UIImage(named: "arrow_drop_down")
downArrow.setImage(downArrowImage, for: .normal)
downArrow.center.y = height/2
downArrow.center.x = 4 * width/5
languageLabel.addSubview(downArrow)
languagePicker.frame = CGRect(x: 0.0, y: self.cellHeight + 1.0, width: self.bounds.width, height: 0.0)
languagePicker.delegate = self
languagePicker.dataSource = self
languagePicker.backgroundColor = UIColor.white.withAlphaComponent(0.05)
languagePicker.selectRow(20, inComponent: 0, animated: true)
let backGroundView = UIView(frame: CGRect(x: 0.0, y: 1.0, width: width, height: height - 1.0))
backGroundView.backgroundColor = .clear
self.selectedBackgroundView = backGroundView
}
}
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