Creating Combo Box in iPad2 by Xcode 4.2

[Kelvin Chan]

I am using Xcode 4.2 for my programming work. In my task, I preferred the users to make choices through the combo box in their iPad2. However, I cannot find the combo box button in the library. Do I miss some setting so that I cannot find the button? Does the combo box button be supported in the iPad2 platform? Also, I am using iPad 5.0 simulator.