Implement a PDF Viewer in TabBar Application

[andreamap]

Hi, I'm a new developer and I'm doing my first app.
I want to implement a PDFViewer into a tab of my TabBar, but when I insert the xib file and the .m & .h files to the tab and click on Build & Run My app won't open, I Mean it opens but when I tap on PDF's tab the app crashes
Why?
I have a local PDF file and I want to show a first banner view on my tab with a Round Rect Button, & when I click on the button a view comes up and shows my PDF.
I need help!

Thanks