iOS 14 bug with date picker toolbar

Question

The toolbar is higher than the date picker, is this a bug? or I do something wrong?

My code:

class ViewController: UIViewController {
    
    @IBOutlet weak var textField: UITextField!
    
    let datePicker = UIDatePicker()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        showDatePicker()
    }
    
    func showDatePicker(){
        //Formate Date
        datePicker.datePickerMode = .date
        datePicker.preferredDatePickerStyle = .compact
        
        //ToolBar
        let toolbar = UIToolbar();
        toolbar.sizeToFit()
        let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(donedatePicker));
        let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace, target: nil, action: nil)
        let cancelButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancelDatePicker));
        
        toolbar.setItems([doneButton,spaceButton,cancelButton], animated: false)
        
        textField.inputAccessoryView = toolbar
        textField.inputView = datePicker
        
    }
    
    @objc func donedatePicker(){
        
        let formatter = DateFormatter()
        formatter.dateFormat = "dd/MM/yyyy"
        textField.text = formatter.string(from: datePicker.date)
        self.view.endEditing(true)
    }
    
    @objc func cancelDatePicker(){
        self.view.endEditing(true)
    }
}

Yes I know that I can go back to preferredDatePickerStyle = .wheels, but Its Interesting why does it acting like this

Answer 1

You can achieve your requirement from this

Objective C

 if (@available(iOS 13.4, *)) {
        datePicker.preferredDatePickerStyle = UIDatePickerStyleWheels;
        [datePicker sizeToFit];
    }

In Swift

    if #available(iOS 13.4, *) {
        datePicker.preferredDatePickerStyle = .wheels
        datePicker.sizeToFit()
    }

Answer 2

You can try it

 if #available(iOS 13.4, *) {
    datePicker.preferredDatePickerStyle = .wheels
    datePicker.backgroundColor = UIColor.white
 }