![](/img/trans.png)
[英]Swift UI TextField onCommit called when lost focus (macOS)
[英]Set focus on a next textfield when user has typed 2 characters in Swift
我在拼命地尋找可以回答我問題的人。 我有一個帶有4個TextField的表單。 我希望當用戶鍵入2個字符時,焦點自動設置在下一個TextField上。
我嘗試了以下代碼:
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
guard let text = textField.text else { return true }
//let newLength = text.characters.count + string.characters.count - range.length
if (text.characters.count == 2 && textField.tag == 10){
textField.resignFirstResponder()
self.txt_min_debut.becomeFirstResponder()
return false
}
else if (text.characters.count == 2 && textField.tag == 11){
textField.resignFirstResponder()
self.txt_heure_fin.becomeFirstResponder()
return false
}
else if (text.characters.count == 2 && textField.tag == 12){
textField.resignFirstResponder()
self.txt_min_fin.becomeFirstResponder()
return false
}
else if (text.characters.count == 2 && textField.tag == 13){
textField.resignFirstResponder()
self.txt_cr.becomeFirstResponder()
return false
}
它不像我想要的那樣工作。 當我鍵入2個字符時,焦點仍然位於同一TextField上。 我必須輸入第三個字符才能繼續下一個。 另一個問題是del鍵被識別為鍵。 這意味着,當我鍵入2個字符時,無法再次對其進行編輯。
我正在使用Xcode和Swift 2。
更新了SWIFT3的代碼
@IBOutlet weak var tf1: UITextField!
@IBOutlet weak var tf2: UITextField!
@IBOutlet weak var tf3: UITextField!
@IBOutlet weak var tf4: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
tf1.delegate = self
tf2.delegate = self
tf3.delegate = self
tf4.delegate = self
tf1.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: UIControlEvents.editingChanged)
tf2.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: UIControlEvents.editingChanged)
tf3.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: UIControlEvents.editingChanged)
tf4.addTarget(self, action: #selector(self.textFieldDidChange(textField:)), for: UIControlEvents.editingChanged)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
tf1.becomeFirstResponder()
}
func textFieldDidChange(textField: UITextField){
let text = textField.text
if text?.utf16.count==2{
switch textField{
case tf1:
tf2.becomeFirstResponder()
case tf2:
tf3.becomeFirstResponder()
case tf3:
tf4.becomeFirstResponder()
case tf4:
tf4.resignFirstResponder()
default:
break
}
}else{
}
}
試試這個代碼。
@IBOutlet weak var textFrst: UITextField!
@IBOutlet weak var textSecond: UITextField!
@IBOutlet weak var textThird: UITextField!
@IBOutlet weak var textFourth: UITextField!
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool
{
let currentString: NSString = textField.text!
let newString: NSString =
currentString.stringByReplacingCharactersInRange(range, withString: string)
let newLength: Int = newString.length
if textField == textFrst {
if newLength == 3 {
textSecond.becomeFirstResponder()
}
}
if textField == textSecond{
if newLength == 3 {
textThird.becomeFirstResponder()
}
}
if textField == textThird {
if newLength == 3 {
textFourth.becomeFirstResponder()
}
}
if textField == textFourth {
if newLength == 3 {
self.view.endEditing(true)
}
}
return true
}
我有一個類似的問題,只需將textField.text與替換字符串連接起來即可解決此問題:
let enteredText = textField.text! + string
然后,諸如“如果enterText.characters.count == 2”之類的邏輯應能按預期工作。
感謝你們倆。
我測試了兩種解決方案,而Ben的一種則無法使用,它在TextField中僅保留1個字符而不是2個字符。
Bhagyalaxmi的解決方案似乎行得通,只是光標不會“視覺上”移動到下一個TextField(但是當您編寫字符時,它會放在合適的位置)。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.