Hello, I'm trying to write an application in objecgtive-c that neeed to have some button on the header of a collectionview. It's visible on the preview, but not on the simulator, neither on a iphone. And I can't find why is that. I saw a lot of diffrent poste on internet about that, but can't find the issue! Preview: Simulator: Everythink is done on storayboard, so I don't know what to share, the storyboard file is 244Mb