I had a UITextField which when tapped need to show a UIPickerView. Also the data selected in pickerview will be inserted in the textfield. To Achiceve it I am now using subhajit's SHPickerField.
I do have created a subclass of UITextField, it is easy to implement and use. Here is the GitHub link:
Visit https://github.com/subhajitregor/SHPickerFieldExample
Please see the example to see how to use. The Readme file is also updated now.