itenyh questions

• Click on two buttons at the same time, if one covers the other one
• What does "Must explicitly describe intended ownership of an object array parameter" mean and how can I fix it?
• How to convert the Date String with time zone to NSDate
• How does dispatch_set_target_queue work?
• when should I wrap my code into autorelease pool
• Where is the DEBUG macro defined?
• What's the difference between Xcode's move to trash and remove reference?

itenyh answers