I am trying to simply capture the string typed into a UITextField in a GameController class that supports a MainViewController. My code below doesn't capture it into the wordAttempt string. Maybe its something to do with the textfield delegate which I am not sure how to set... Any help very much appreciated!
Class MainViewController: UIViewController {
required init?(coder aDecoder: NSCoder) {
controller = GameController()
super.init(coder: aDecoder)
}
override func viewDidLoad() {
super.viewDidLoad()
let gameView = UIView(frame: CGRectMake(0, 0, ScreenWidth, ScreenHeight))
self.view.addSubview(gameView)
controller.gameView = gameView
}
and then
class GameController: NSObject, UITextFieldDelegate {
var gameView: UIView!
var writeText: UITextField!
self.writeText = UITextField(frame: CGRectMake(100,100,200,50))
writeText.delegate = self
writeText.becomeFirstResponder()
gameView.addSubView(writeText)
textFieldShouldReturn(writeText)
textFieldDidEndEditing(writeText)
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
writeText.resignFirstResponder()
textFieldDidEndEditing(writeText)
return true
}
func textFieldDidEndEditing(textField: UITextField) {
self.wordAttempt = writeText.text ?? ""
writeText.resignFirstResponder()
}
If you want get informed anytime user enter some characters to your UITextField you should subscribe to it changes.
// inside your GameController
self.writeText = UITextField(frame: CGRectMake(100,100,200,50))
writeText.addTarget(self, action: "textFieldDidChange:", forControlEvents: UIControlEvents.EditingChanged)
writeText.becomeFirstResponder()
...
func textFieldDidChange(textField: UITextField) {
let inputText = textField.text ?? ""
}
And you will get text that user type in intpuText variable. Because of optional type you should unwrap it before use. And ?? "" means "if it nil put empty string to intputText, otherwise - text". This is why you see Optional("") when you output text.
If you need to know only when user stop typing consider textFieldDidEndEditing(_:) method of UITextFieldDelegate.
class GameController: NSObject, UITextFieldDeleage {
...
self.writeText = UITextField(frame: CGRectMake(100,100,200,50))
writeText.delegate = self
writeText.becomeFirstResponder()
...
func textFieldDidEndEditing(textField: UITextField) {
let inputText = textField.text ?? ""
}
You need to have it detect that the text has changed. You could do this say with a separate button press. Or you could use the textField delegate function textFieldDidEndEditing and textFieldDidBeginEditing to detect when the text has changed. Note that you would have to set the textfield's delegate.
Related
I am trying to have my inputs inside of my UITextField show up in the debugger console, when I am typing in the created TextField however the Delegate Methods don't seem to be responding. I am expecting to see my print statement that are seen below for my UIdelegate methods, like when I first started typing, while I type, and when I press the 'return key'. All delegate methods do not seem to be activated, and I am not sure how to make my Textfield link to the delegate method directly. In addition, I have another UITextField (Not shown here), would I have to 'addTarget' to differentiate between the two?
class ViewController: UIViewController, UITextFieldDelegate {
let createUserName: UITextField = {
var myTextField = UITextField ()
myTextField.translatesAutoresizingMaskIntoConstraints = false
myTextField.placeholder = "Username" //set placeholder text
myTextField.font = UIFont.systemFont(ofSize: 14) // set font size of text field
myTextField.layer.borderWidth = 1.0 //set width
myTextField.layer.borderColor = UIColor.red.cgColor//set background color to a ui color
myTextField.layer.backgroundColor = UIColor.white.cgColor
myTextField.layer.cornerRadius = myTextField.frame.height/2
myTextField.autocorrectionType = .no // disable autocorrect when typing for .no, enable with .yes
myTextField.isSecureTextEntry = false// masked text
myTextField.keyboardType = .default //keyboard style is set to default
myTextField.returnKeyType = .default //retuen key text changed to "Done" instead of return
myTextField.clearButtonMode = .whileEditing
myTextField.delegate = self as? UITextFieldDelegate
return myTextField
}()
override func viewDidLoad() {
super.viewDidLoad()
createUserName.delegate = self
view.addSubview(createUserName)
setupUserName()
}
//UITextField Delegate methods
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
print("textfield should begin editting")
return true
}
func textFieldDidBeginEditing(_ textField: UITextField) {
print("text field edit")
}
//see string that is typed in debugger for use to validate password and crossreference username
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if let textFieldString = textField.text, let swtRange = Range(range, in: textFieldString) {
let fullString = textFieldString.replacingCharacters(in: swtRange, with: string)
print("FullString: \(fullString)")
}
return true
}
//dismiss keyboard when return button is pressed
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
print("text field return")
return true
}
}
Your viewController should inherit from UITextFieldDelegate
class YourViewController : UIViewController, UITextFieldDelegate {
// your code
}
Also in your ViewDidLoad, move your createUsername.delegate = self to last line.
That string:
myTextField.delegate = self as? UITextFieldDelegate
tell us that your VC don't directly conform protocol UITextFieldDelegate...
If you conformed swift doesn't add as? cast ...
I have two NSTextField objects which I want to highlight when user clicks on it.
The initial text field is already highlighted on NSWindow load. I am able to get mouse down event for text field click, but unable to distinguish which textfield did the user tapped.
I tried using hitTest on the text field using the NSPoint obtained from the NSEvent object, but the NSView returned is nil. The view it returns is that of the window's view and not that text field.
class SettingsViewController: NSViewController {
private var sview: SettingsView?
override func viewDidLoad() {
initEvents()
}
override func loadView() {
if let settingsView = SettingsView.createFromNib() {
self.view = settingsView
self.sview = settingsView as? SettingsView
}
}
func initEvents() {
self.sview!.emailTextField.delegate = self
}
}
extension SettingsViewController: NSTextFieldDelegate, NSTextDelegate {
override func mouseDown(with event: NSEvent) {
self.log.debug("mouse down: \(event.buttonNumber), \(event.eventNumber), \(event.locationInWindow)")
// How to know which text field triggered this?
}
func control(_ control: NSControl, textView: NSTextView, doCommandBy commandSelector: Selector) -> Bool {
self.log.debug("control delegate")
return false
}
func textField(_ textField: NSTextField, textView: NSTextView, shouldSelectCandidateAt index: Int) -> Bool {
self.log.debug("text field should select")
return true
}
func textShouldBeginEditing(_ textObject: NSText) -> Bool {
self.log.debug("text field should being editing")
return true
}
}
class SettingsView: NSView {
private let log = Logger()
private static var topLevelObjects: NSArray?
#IBOutlet weak var emailTextField: ASTextField!
#IBOutlet weak var passwordTextField: NSSecureTextField!
// ...
}
I am adding delegate to only one text field.
self.sview!.emailTextField.delegate = self
But when I click on the passwordTextField, I am getting the mouse click event as well. Why is this happening?
How to distinguish NSTextField mouse click and highlight the text field?
I tried subclassing NSTextField and adding click handler, but it is not working.
class ASTextField: NSTextField {
private let log = Logger()
required init?(coder: NSCoder) {
super.init(coder: coder)
bootstrap()
}
override init(frame frameRect: NSRect) {
super.init(frame: frameRect)
bootstrap()
}
override func awakeFromNib() {
super.awakeFromNib()
bootstrap()
}
func bootstrap() {
self.delegate = self
}
}
extension ASTextField: NSTextFieldDelegate {
override func mouseDown(with event: NSEvent) {
// This is not working
self.log.debug("mouse down")
super.mouseDown(with: event)
}
}
If what you're looking for is to be able to select the text when you click (focus) the text field, you can override the class to simplify your task and you won't have to worry about locating the clicked field from the delegate.
For an NSView object, when it gets focus (ie. clicking or tabbing) it will call becomeFirstResponder so we can hook in there.
When an NSTextField becomes editable (or selectable) it grabs a reusable 'field editor' and overlays it on top of your text field during the editing. If your NSTextField has focus, you can grab this field editor using the currentEditor() call on the view.
So, once you have the field editor, you can perform selectAll on the editor to select the text.
Example class :-
class AutoselectOnFocusTextField: NSTextField {
override func becomeFirstResponder() -> Bool {
guard super.becomeFirstResponder() else {
return false
}
if let editor = self.currentEditor() {
editor.perform(#selector(selectAll(_:)), with: self, afterDelay: 0)
}
return true
}
}
Hope this helps!
I updated the ASTextField as below.
class ASTextField: NSTextField {
// ...
override func mouseDown(with event: NSEvent) {
self.sendAction(#selector(didClick(_:)), to: self)
super.mouseDown(with: event)
}
#objc func didClick(_ event: NSEvent) {
self.log.debug("did click")
}
}
In the SettingsView, I missed calling super.layout(), without which the click won't work, nor the other text field will get focus when clicked.
class SettingsView: NSView {
// ...
override func layout() {
self.log.debug("layout method")
super.layout() // This is important
}
}
NSTextField delegate methods are not required.
The method you overwrote, mouseDown(with), isn't a member of the NSTextFieldDelegate or NSTextDelegate protocols. You overwrote NSViewController.mouseDown(with).
Whenever that method is called, the thing that was clicked is your SettingsViewController's view.
To react to your textfield being selected, you use NSTextFieldDelegate .textField(_:textView:shouldSelectCandidateAt:), which you already have. The value of the textView parameter is the text view that was selected.
I have an addTarget set up on UITextField that clears the placeholder text when editingDidBegin. But I don't know how to restore the placeholder text if the user clicks on another UITextField, or the field is left empty.
This is located in viewDidLoad()
firstInitialTextField.addTarget(self, action: #selector(clearPlaceholderInTextField), for: UIControl.Event.editingDidBegin)
This function is located in the main body of the program.
#objc func clearPlaceholderInTextField() {
firstInitialTextField.placeholder = ""
}
I have several fields I would like to apply this same functionality to.
Create outlet collection for all the textfields like
#IBOutlet var textFs:[UITextField]!
with different tag for each , And array of placeHolders that you set in viewDidLoad
var placeholders = [String]()
Then set the vc as the delegate for all of them in viewDidLoad
textFs.forEach { $0.delegate = self }
Implement
func textFieldDidBeginEditing(_ textField: UITextField) {
textField.placeholder = ""
}
func textFieldDidEndEditing(_ textField: UITextField) {
textField.placeholder = placeholders[textField.tag]
}
I have a custom UIView component that has a UITextField, UIImageView and another UIView.
I need to change the behavior of the UITextField to display a UIDatePicker when it's tapped. This is the code I'm trying to execute but for some reason the datePicker doesn't open when it's tapped:
class TextFieldWithFeedback : UIView {
#IBOutlet weak var textField: UITextField!
#IBOutlet weak var imageView: UIImageView!
#IBOutlet weak var underlineView: UIView!
override func draw(_ rect: CGRect) {
let datePicker = UIDatePicker()
datePicker.datePickerMode = .date
self.textField.inputView = datePicker
}
}
When I used the same code on my ViewController (code below) it worked:
override func viewDidLoad() {
super.viewDidLoad()
let datePicker = UIDatePicker()
datePicker.datePickerMode = .date
customView.textField.inputView = datePicker
}
Now, this solution works but it's not ideal because I have 8 of those custom views and it would be better to set it once instead of 8 times.
Which method of the View class should I use to set the datePicker up? Since draw doesn't work.
Also, how can I attach a function to modify my UITextField value when the user picks a date?
Managed to solve it like this:
//To control whether or not to use the DatePicker, easily customized on the Storyboard
#IBInspectable var useDatePicker: Bool = false
#IBAction func textFieldEditing(_ sender: UITextField) {
self.textFieldStartedEditing(sender: sender)
}
func textFieldStartedEditing(sender: UITextField) {
if useDatePicker {
let datePickerView:UIDatePicker = UIDatePicker()
datePickerView.datePickerMode = .date
sender.inputView = datePickerView
datePickerView.addTarget(self, action: #selector(self.datePickerValueChanged), for: UIControlEvents.valueChanged)
}
}
func datePickerValueChanged(sender: UIDatePicker) {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd/MM/YYYY"
self.textField.text = dateFormatter.string(from: sender.date)
}
All of the code above inside my customView class.
If anyone else is having trouble with this and needs help feel free to comment, I promise I'll be more helpful than the people who commented on the question :)
what you need to do is addTarget to your Textfield and then in a method Show the UIPickerView
self.textField.addTarget(self, action: #selector(ViewController.openDatesPicker), for: .touchDown)
You should also set tag for your textfield so you can identify it later in the code. Also you should implement this method which stops the keyboard from showing up
func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
if textField.tag == 2 {
return true
} else {
return false
}
}
Error occurs when I set UITextField delegate.
My code is:
import UIKit
class UserAlertVC: UIView , UITextFieldDelegate {
/*
// Only override draw() if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func draw(_ rect: CGRect) {
// Drawing code
}
*/
override init(frame: CGRect) {
super.init(frame: frame)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
self.addBehavior()
}
func addBehavior (){
print("Add all the behavior here")
userNameTxtField.delegate = self
passwordTxtField.delegate = self
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
return true
}
func textFieldDidBeginEditing(textField: UITextField) {
}
#available(tvOS 10.0, *)
func textFieldDidEndEditing(textField: UITextField, reason: UITextFieldDidEndEditingReason) {
}
#IBAction func actionOnCancel(sender: UIButton) {
self .removeFromSuperview()
}
#IBAction func actionOnProceed(sender: UIButton) {
self .removeFromSuperview()
UserAlertVC.showAlertForUser()
}
#IBOutlet var userNameTxtField: UITextField!
#IBOutlet var passwordTxtField: UITextField!
static func showAlertForUser() {
let alert = NSBundle.mainBundle().loadNibNamed("KeyboardViewController", owner: self, options: nil)!.last as! UIView
let windows = UIApplication.sharedApplication().windows
let lastWindow = windows.last
alert.frame = UIScreen.mainScreen().bounds
lastWindow?.addSubview(alert)
}
}
Error message is:
fatal error: unexpectedly found nil while unwrapping an Optional value
I have used Custom Alert View using XIB.pls suggest any solution.
Firstly take a look at life cycle of the view. Depending on this it is possible to highlight that method awakeFromNib is quite suitable because:
The nib-loading infrastructure sends an awakeFromNib message to each
object recreated from a nib archive, but only after all the objects in
the archive have been loaded and initialized. When an object receives
an awakeFromNib message, it is guaranteed to have all its outlet and
action connections already established.
Make sure to put an #IBOutlet for the .Xib content view, also you need to add the Nib code. Last, make sure in your ViewController you set your UIView Outlet to be UserAlertVC and you add the awakeFromNib method. Please find attached the code. Let me know if you need further help.
Here is the code related to the .xib file.
import UIKit
class UserAlertVC: UIView, UITextFieldDelegate {
//MARK: - Outlets
#IBOutlet var contentView: UIView!
#IBOutlet var userNameTxtField: UITextField!
#IBOutlet var passwordTxtField: UITextField!
//MARK: - Loads
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
commonInit()
}
//MARK: - Functions
func commonInit() {
Bundle.main.loadNibNamed("UserAlertVC", owner: self, options: nil)
userNameTxtField.delegate = self
passwordTxtField.delegate = self
contentView.translatesAutoresizingMaskIntoConstraints = false
addSubview(contentView)
// add constraints programmatically
}
// add the rest of your code
}
Here is the code related to the ViewController.
class ViewController: UIViewController {
//MARK: - Outlets
#IBOutlet weak var userAlertVC: UserAlertVC!
//MARK: - Loads
override func viewDidLoad() {
super.viewDidLoad()
}
override func awakeFromNib() {
super.awakeFromNib()
}
}