Swift 3 & Swift 4.2:
override func viewDidLoad() {
super.viewDidLoad()
let sampleTextField = UITextField(frame: CGRect(x: 20, y: 100, width: 300, height: 40))
sampleTextField.placeholder = "Enter text here"
sampleTextField.font = UIFont.systemFont(ofSize: 15)
sampleTextField.borderStyle = UITextField.BorderStyle.roundedRect
sampleTextField.autocorrectionType = UITextAutocorrectionType.no
sampleTextField.keyboardType = UIKeyboardType.default
sampleTextField.returnKeyType = UIReturnKeyType.done
sampleTextField.clearButtonMode = UITextField.ViewMode.whileEditing
sampleTextField.contentVerticalAlignment = UIControl.ContentVerticalAlignment.center
sampleTextField.delegate = self
self.view.addSubview(sampleTextField)
}
Delegate Methods:
// MARK:- ---> UITextFieldDelegate
extension ViewController: UITextFieldDelegate {
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
// return NO to disallow editing.
print("TextField should begin editing method called")
return true
}
func textFieldDidBeginEditing(_ textField: UITextField) {
// became first responder
print("TextField did begin editing method called")
}
func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {
// return YES to allow editing to stop and to resign first responder status. NO to disallow the editing session to end
print("TextField should snd editing method called")
return true
}
func textFieldDidEndEditing(_ textField: UITextField) {
// may be called if forced even if shouldEndEditing returns NO (e.g. view removed from window) or endEditing:YES called
print("TextField did end editing method called")
}
func textFieldDidEndEditing(_ textField: UITextField, reason: UITextFieldDidEndEditingReason) {
// if implemented, called in place of textFieldDidEndEditing:
print("TextField did end editing with reason method called")
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
// return NO to not change text
print("While entering the characters this method gets called")
return true
}
func textFieldShouldClear(_ textField: UITextField) -> Bool {
// called when clear button pressed. return NO to ignore (no notifications)
print("TextField should clear method called")
return true
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
// called when 'return' key pressed. return NO to ignore.
print("TextField should return method called")
// may be useful: textField.resignFirstResponder()
return true
}
}
// MARK: UITextFieldDelegate <---
Swift 2.0:
let sampleTextField = UITextField(frame: CGRectMake(20, 100, 300, 40))
sampleTextField.placeholder = "Enter text here"
sampleTextField.font = UIFont.systemFontOfSize(15)
sampleTextField.borderStyle = UITextBorderStyle.RoundedRect
sampleTextField.autocorrectionType = UITextAutocorrectionType.No
sampleTextField.keyboardType = UIKeyboardType.Default
sampleTextField.returnKeyType = UIReturnKeyType.Done
sampleTextField.clearButtonMode = UITextFieldViewMode.WhileEditing;
sampleTextField.contentVerticalAlignment = UIControlContentVerticalAlignment.Center
sampleTextField.delegate = self
self.view.addSubview(sampleTextField)
Delegate Methods:
// MARK:- ---> Textfield Delegates
func textFieldDidBeginEditing(textField: UITextField) {
print("TextField did begin editing method called")
}
func textFieldDidEndEditing(textField: UITextField) {
print("TextField did end editing method called")
}
func textFieldShouldBeginEditing(textField: UITextField) -> Bool {
print("TextField should begin editing method called")
return true;
}
func textFieldShouldClear(textField: UITextField) -> Bool {
print("TextField should clear method called")
return true;
}
func textFieldShouldEndEditing(textField: UITextField) -> Bool {
print("TextField should snd editing method called")
return true;
}
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
print("While entering the characters this method gets called")
return true;
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
print("TextField should return method called")
textField.resignFirstResponder();
return true;
}
// MARK: Textfield Delegates <---