[英]Get uitextfield data from custom uitableview cell - Swift
我對帶有文本字段的自定義tableview單元格有疑問。 因此,對於具有文本字段的單元格,我有一個單獨的類,但是無法在tableview類中檢索數據。 在tableview類和textFieldShouldReturn函數中有一個用於textfield的委托,但是當我按下“ Done”按鈕時什么也沒有發生。 哪里可能有問題?
非常感謝!
這是表格視圖的代碼:
class MainTVC: UITableViewController, UITextFieldDelegate{
var tableParts: [Dictionary<String, Any>] = []
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
tableParts = [
["type": "title", "data": "Some data", "enabled": true],
["type": "date", "data": "Some data", "enabled": true],
["type": "location", "data": "Loading...", "enabled": true],
]
tableView.reloadData()
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
}
override func numberOfSections(in tableView: UITableView) -> Int { return 1 }
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return tableParts.count }
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
var cell = tableParts[indexPath.row]
switch(cell["type"] as! String) {
...
case "textbox":
let rTemplateTextBox = tableView.dequeueReusableCell(withIdentifier: "recapTextCell", for: indexPath) as! RTextCell
rTemplateTextBox.textField.text = cell["data"] as? String ?? "No text"
rTemplateTextBox.data = cell
return rTemplateTextBox
default:
let cell = tableView.dequeueReusableCell(withIdentifier: "defCell", for: indexPath)
cell.textLabel?.text = "Unknown type of cell!"
return cell
}
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
print("Should return!")
return true
}
}
對於一個單元格:
class RTextCell: UITableViewCell, UITextFieldDelegate {
var textField = UITextField()
var data: Dictionary<String, Any>?
override func awakeFromNib() {
super.awakeFromNib()
textField.delegate = self
let padding = UIView(frame: CGRect(x:0, y:0, width: 15, height: self.frame.height))
textField = UITextField(frame: CGRect(x:0, y:0, width: self.frame.width, height: 40))
textField.placeholder = "Your text here"
textField.textColor = UIColor.white
textField.tintColor = UIColor.white
textField.backgroundColor = UIColor.clear
textField.leftView = padding
textField.leftViewMode = .always
self.addSubview(textField)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
print("Should return")
return true
}
func textFieldDidEndEditing(_ textField: UITextField) {
if data != nil {
data!["data"] = textField.text
print("DATA: \(data!)")
} else {
print("No data")
}
}
}
第一個問題-在您的單元格類中,在awakeFromNib()
您具有:
// CREATE a UITextField
var textField = UITextField()
var data: Dictionary<String, Any>?
override func awakeFromNib() {
super.awakeFromNib()
// assign self as the delegate of textField
textField.delegate = self
let padding = UIView(frame: CGRect(x:0, y:0, width: 15, height: self.frame.height))
// CREATE a NEW UITextField
textField = UITextField(frame: CGRect(x:0, y:0, width: self.frame.width, height: 40))
因此,當您創建NEW文本字段時,將不再為其分配委托。 這就是為什么什么都不會觸發textFieldShouldReturn
或textFieldDidEndEditing
的原因。
將UITextField(frame: ..)
行替換為:
textField.frame = CGRect(x:0, y:0, width: self.frame.width, height: 40)
接下來,與其考慮傳入“數據對象”然后嘗試進行操作,不如考慮使用回調閉包。
將您的單元格類別更改為此:
class RTextCell: UITableViewCell, UITextFieldDelegate {
var textField = UITextField()
// this will be our "call back" closure
var didEndEditAction : ((String)->())?
override func awakeFromNib() {
super.awakeFromNib()
textField.delegate = self
let padding = UIView(frame: CGRect(x:0, y:0, width: 15, height: self.frame.height))
// just set the frame, don't create a NEW textField
textField.frame = CGRect(x:0, y:0, width: self.frame.width, height: 40)
textField.placeholder = "Your text here"
textField.textColor = UIColor.white
textField.tintColor = UIColor.white
textField.backgroundColor = UIColor.clear
textField.leftView = padding
textField.leftViewMode = .always
self.addSubview(textField)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
print("Should return")
return true
}
func textFieldDidEndEditing(_ textField: UITextField) {
// call back using a closure
didEndEditAction?(textField.text ?? "")
}
}
然后像這樣配置它:
case "textbox":
let rTemplateTextBox = tableView.dequeueReusableCell(withIdentifier: "recapTextCell", for: indexPath) as! RTextCell
rTemplateTextBox.textField.text = cell["data"] as? String ?? "No text"
// setup the "call back" closure
rTemplateTextBox.didEndEditAction = {
(newText) in
let cell = self.myData[indexPath.row]
cell["data"] = newText
}
return rTemplateTextBox
您可以在聲明tableView
任何位置獲取單元格textField
數據,只需使用以下代碼
let indexPath = IndexPath(row: yourRow, section: yourSection)
let cell:InputDataCell = yourTable.cellForRow(at: indexPath) as! InputDataCell
if (cell.yourTextFieald.text?.characters.count)! {
print(cell.yourTextFieald.text!)
}
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