iOS 10 custom cancel and done buttons do not appear

[Maxatma]

[Maxatma]

I guess, the problem is similar to
#350
#362
But the only one described solution isn't useful, coz toolbar in AbstractActionSheetPicker already has [pickerToolbar layoutIfNeeded];

[Maxatma]

final class KZActionSheetDatePicker: ActionSheetDatePicker {
    var kzdoneButton: UIButton!
    var kzcancelButton: UIButton!
    var kzdoneItem: UIBarButtonItem!
    var kzcancelItem: UIBarButtonItem!
    
    convenience init(title: String!,
                     datePickerMode: UIDatePickerMode,
                     selectedDate: Date!,
                     origin view: UIView!) {
        
       self.init(title: title,
                  datePickerMode: datePickerMode,
                  selectedDate: selectedDate,
                  doneBlock: nil,
                  cancel: nil,
                  origin: view)
        
        kzdoneButton = UIButton(type: .custom)
        kzdoneButton.setTitle("OK", for: .normal)
        kzdoneButton.setTitleColor(.red, for: .normal)
        
        kzcancelButton = UIButton(type: .custom)
        kzcancelButton.setTitle("Cancel", for: .normal)
        kzcancelButton.setTitleColor(.red, for: .normal)
        
         kzdoneItem = UIBarButtonItem(customView: kzdoneButton)
         kzcancelItem = UIBarButtonItem(customView: kzcancelButton)
        
        setDoneButton(kzdoneItem)
        setCancelButton(kzcancelItem)
    }
}

class ViewController: UIViewController {
    
    var picker: KZActionSheetDatePicker!
    
    override func viewDidLoad() {
        
        picker = KZActionSheetDatePicker(title: "Select me",
                                         datePickerMode: .date,
                                         selectedDate: Date(),
                                         origin: self.view)
        
        picker.show()
        
        
        super.viewDidLoad()
    }
}

[Maxatma]

Well, I don't know if that is expected behavior or not, just worked it around by initializing buttons with frame manually:
kzdoneButton = UIButton(frame: CGRect(x: 0, y: 0, width: 100, height: 35))
It works fine on both 10 and 11 iOS
Hope this workaround could help somebody.