Ali questions

• I can not play mp3 file using AVAudioPlayer
• how can I handle push notification when my app is not running
• Should I use multiple threads within my OpenGL ES game?
• APN is not specified?
• How to dynamically show columns in a Jasper Report?
• How to know when Fragment becomes invisible
• Android ListView with Button is not selectable(Clickable)
• Can I change the category of my app at iTunes Connect?
• How to convert NSArray to NSMutableArray
• How can I sort an NSMutableArray alphabetically?

Ali answers