Btukfyl

I am trying to add two bar buttons to toolbar in iOS [Cancel] & [Save] on right and left side accordingly.

I used a third bar button [Spacer] and set it to be [.flexiblewidth] Otherwise, when adding it only the left button appears [Cancel] and the [Spacer] & and [Save] which have to be next disappearing ?

the screen shot is in the link:
https://ibb.co/cZsaVV

let pickerView = UIPickerView()



override func viewDidLoad() {





pickerView.addSubview(self.setToolBar())

}



func setToolBar() -> UIToolbar {

      let toolBar =  UIToolbar()

        toolBar.isTranslucent  = true

        toolBar.backgroundColor = UIColor.clear

        let barButtonAttr = [NSAttributedString.Key.font : UIFont.systemFont(ofSize: 15),

                             NSAttributedString.Key.foregroundColor : UIColor.black]

        // [Save] BarButtonItem

        let saveBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.save, target: self, action: nil)

        saveBarButtonItem.setTitleTextAttributes(barButtonAttr, for: .normal)

        // [Cancel] BarButtonItem

        let cancelBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.cancel, target: self, action: nil)

        cancelBarButtonItem.setTitleTextAttributes(barButtonAttr, for: .normal)



        let spacerBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace ,

                                                  target: self, action: nil)

        spacerBarButtonItem.setTitleTextAttributes(barButtonAttr, for: .normal)

        // add BarButtonItems to toolBar

        toolBar.items = [cancelBarButtonItem,spacerBarButtonItem,saveBarButtonItem]

        toolBar.sizeToFit()

return toolBar

}

func createAccessoryViewWithTarget(_ target: AnyObject, width: CGFloat) -> UIView {



    // Previous button

    let previousButton = UIBarButtonItem(title: "Previous", style: .plain, target: target, action: #selector(self.moveToPreviousTextField))

    previousButton.tintColor = UIColor.white



    //Next button

    let nextButton = UIBarButtonItem(title: "Next", style: .plain, target: target, action: #selector(self.moveToNextTextField))

    nextButton.tintColor = UIColor.white



    // Dismiss/close/done button

    let doneButton = UIBarButtonItem(title: "Done", style: .done, target: target, action: #selector(self.keyboardDoneButtonTapped))

    doneButton.tintColor = UIColor.white



    let keyboardToolbar: UIToolbar = UIToolbar(frame: CGRect(x: 0, y: 0, width: width, height: 44))

    keyboardToolbar.barStyle = .black



    let flexSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)

    let fixedSpace = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)



    var itemsArray = [UIBarButtonItem]()

    itemsArray.append(previousButton)

    itemsArray.append(fixedSpace)

    itemsArray.append(nextButton)

    itemsArray.append(flexSpace)

    itemsArray.append(doneButton)

    keyboardToolbar.items = itemsArray

    keyboardToolbar.sizeToFit()



    return keyboardToolbar

}

This one is old code may be swift3 I guess. Here Im adding 3 buttons previous next and done button. flexible space and fixed space are used for spaces between buttons. Important to note here is the order that you adding your barbutton items. In your case use flexible space to place your 2 buttons on right and left end in the order of left end button, flexible space, right end button.

I've got the solution finally.

I am adding the ToolBar to the PickerView and then calling UIToolBar.SizeToFit() which is must in all cases.

the issue was I had to change the picker view size later in this case the size of subview ToolBar is not adapting with the new size coordination of pickerView. So the solution simply to call again ToolBar.SizeToFit() after any modification of parent view. here's snap of the code:

// popupView is custom UIPickerView

popupView.frame = CGRect(x:0, y:0, width:100, height:100)

// toolBar is an object of UIToolBar of the custom UIPickerView AddCurrencyPicker

(popupView as! AddCurrencyPicker).toolBar.sizeToFit()