Chris Gummer questions

Chris Gummer answers

• Demystify NSOperation: concurrent vs non-concurrent and async pattern
• How to close an application programmatically when the user taps on a button
• How to monitor MPMoviePlayerController playback progress while not killing a battery?
• Navigation Bar Back Button, text not center alligined
• JPA + Hibernate + autocommit
• iPhone - Add Core Data To existing Project?
• comma separated thousand NSString stringWithFormat
• iOS Background downloads when the app is not active
• Limit a double to two decimal places without trailing zeros
• Unable to dismiss MFMailComposeViewController, delegate not called