Hiding/ Showing UIPickerView

Question

I Have an a touchesEnded event that checks for when a UITextField is pressed. What I would like it to do is is hide/show a UIPickerView. How can this be done?

Answer 1

In a scrollView based application, showing and hiding UIPickerView could be a tough issue as it is relatively hard to pin it to the bottom of the visible screen rectangle. You can do it easily with the following code.

let alertController = UIAlertController(title: title, message: "\n\n\n\n\n\n\n\n\n\n", preferredStyle: .ActionSheet)
alertController.view.addSubview(pickerView)
alertController.addAction(UIAlertAction(title: "OK", style: .Cancel) { action in
})
self.presentViewController(alertController, animated: true, completion: nil)

To summarize, you create an UIAlertController with an empty message. In order to make the alertController to have the size of your pickerView, you give the message neccessary number of line breaks. And lastly you add your pickerView as a subview of alertController.view

You then follow the selected pickerView rows with the UIPickerViewDelegate methods.