Ufdjrw

I am trying to figure out how I can create a global function that adds a done button to keyboards I choose.

I can add a done button, but I currently copy the code to each view controllor. I want to add a function to the UITextField to show the done button on the keyboard.
Current code commonly found on stack overflow.

Code found in viewDidLoad:

let toolbar = UIToolbar()
toolbar.sizeToFit()
let doneBotton = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.done, target: self, action: #selector(self.doneClicked))

toolbar.setItems([doneBotton], animated: false)

@objc found outside viewdidload:

@objc func doneClicked() 
 view.endEditing(true)

you could simply create an extension of UITextField like below:-

extension UITextField 

func addDoneButton() 
 let toolbar = UIToolbar()
 toolbar.sizeToFit()

 let doneButton = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(doneClicked))

 toolbar.setItems([doneButton], animated: false)

 self.inputAccessoryView = toolbar


@objc func doneClicked() 
 self.endEditing(true)

And call it like below:-

class DoneKeyboardViewController: UIViewController 

@IBOutlet weak var txtField: UITextField!

override func viewDidLoad() 
 super.viewDidLoad()

 txtField.addDoneButton()

you can try this extension of UITextField.

the UITextField's extension is global, the TextFieldDone protocol is used for tagging where you add keyboards you choose.

class ViewController: UIViewController, TextFieldDone 
 @IBOutlet weak var textField: UITextField!

 override func viewDidLoad() 
 super.viewDidLoad() 
 textField.addDoneButtonOnKeyboard(self)
 

 @objc
 func doneButtonAction(_ textField: UITextField) 
 print("this")
 


protocol TextFieldDone
 func doneButtonAction(_ textField: UITextField)


extension UITextField: TextFieldDone

 func addDoneButtonOnKeyboard(_ target: UIViewController)
 
 let doneToolbar: UIToolbar = UIToolbar(frame: CGRect(x: 0, y: 0, width: 320, height: 50))
 doneToolbar.barStyle = UIBarStyle.blackTranslucent
 let flexSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace, target: nil, action: nil)
 let done: UIBarButtonItem = UIBarButtonItem(title: "Done", style: UIBarButtonItem.Style.done, target: target, action: #selector(doneButtonAction(_:)))

 var items = [UIBarButtonItem]()
 items.append(flexSpace)
 items.append(done)
 doneToolbar.items = items
 doneToolbar.sizeToFit()
 inputAccessoryView = doneToolbar
 

 @objc func doneButtonAction(_ textField: UITextField)
 print("PlaceHolder")
 

You could create a new view controller class that implements this functionality, then use it as a super class for the rest of your view controllers

You could subclass UIViewController and override its viewDidLoad with the implementation you've presented and then set all of your view controller classes in interface builder to your derived class instead of UIViewController.

Or you could subclass UITextField and set its keyboard to the Done keyboard as a default in its init method with:

class TextField : UITextField 
 required init?(coder aDecoder: NSCoder) 
 super.init(coder: aDecoder)
 self.returnKeyType = .done
 

Then everywhere in your storyboards where you have a text field that you want to show the done button, you set the text field's class to TextField instead of UITextField. You need the initWithCoder because that's the initializer that gets called when creating the class from a storyboard.

Try this :

class CustomTextField: UITextField 
 override init(frame: CGRect) 
 super.init(frame: frame)
 addDoneButtonOnKeyboardToInput()
 
 required init?(coder aDecoder: NSCoder) 
 super.init(coder: aDecoder)
 addDoneButtonOnKeyboardToInput()
 
 var doneToolbar: UIToolbar?
 var doneButton: UIBarButtonItem?
 func addDoneButtonOnKeyboardToInput() 
 if (doneToolbar == nil) 
 doneToolbar = UIToolbar(frame: CGRect(x: 0, y: 0, width: 320, height: 50))
 doneToolbar?.barStyle = UIBarStyle.default

 let flexSpace = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace, target: nil, action: nil)
 doneButton = UIBarButtonItem(title: SF.buttons.done, style: UIBarButtonItem.Style.done, target: nil, action: #selector(doneButtonAction(sender:)))

 var items = [UIBarButtonItem]()
 items.append(flexSpace)
 if let btn = doneButton 
 items.append(btn)
 

 doneToolbar?.items = items
 
 doneButton?.target = self
 doneToolbar?.sizeToFit()

 self.inputAccessoryView = doneToolbar

 

 @objc
 func doneButtonAction(sender: UIBarButtonItem) 
 self.resignFirstResponder()