Mr. Berna questions

Mr. Berna answers

• Is there a way to know if a mobile user previously visited a site via a QR code URL?
• iOS App Crash On PushViewController, but only in TestFlight
• How to get 12 hour format time string when system is set to use 24 hour format
• Storyboard - Multiple UITableViewControllers with the same custom cell
• Optimizing vertices for skeletal animation in OpenGL ES
• Xcode 4 iOS project structuring questions
• unable to generate new bundle seed id, is it ok to use the same?
• How to debug a GLSL shader?
• MPMoviePlayerViewController doesn't auto-rotate
• Casting sender to IBAction as id or specific class