I've written an IOS App which uses
Can you show us some of the code you are using. I have used UITextFields in UICollectionViews without a problem, so I am not sure what your question is.
First add a tag in storyboard or programatically to your textfield for this example we will use a tag of 2
Then every time you want to modify the textfield simply call
UITextField *myText = (UITextField *)[cell viewWithTag:2];