Storyboard和xib在同一个项目中使用

I am stumbling over what I believe is probably a fundamental misunderstanding of how classes work in Objective-C. I am using Storyboards but in this app I wanted to create a simple custom date picker view for a textfield on one of my view controllers. However, I seem to be having a problem accessing any of the properties of the date picker class from my view controller:I am stumbling over what I believe is probably