Change text color on UIPickerView and UITextField

There is no property to do so, you need to use NSAttributedString in both cases.

TextField

How to change the color of the placeholder text in a textfield:

 self.textField.attributedPlaceholder = NSAttributedString(string:  NSLocalizedString("textfield-placeholder", comment: "placeholder for title"), attributes: [NSForegroundColorAttributeName : UIColor.whiteColor()])

PickerView

How to change the color of the placeholder text in a picker.

This is just a bit more elaborated. If you have the delegate method for titleForFor you need to replace it with:

      func pickerView(pickerView: UIPickerView, attributedTitleForRow row: Int, forComponent component: Int) -> NSAttributedString? {
       return NSAttributedString(string: String(array[row]), attributes: [NSForegroundColorAttributeName:mPickerLabel.textColor])
      }

Make sure to call mPicker.reloadAllComponents() in your viewWillAppear if you change the color from another view and you want it updated with the current color. Otherwise, it will show the old color until the user scrolls the picker.