Johnnywho questions

Johnnywho answers

• Xcode 4.4, build app with ARC for iOS 4.2
• When I use prepareForSegue to pass value to the aim controller, there are some problems
• performSelectorOnMainThread with multiple parameter
• how to check an dispatch_async block has finished running
• Headers for my static library not found
• Build Static Library in XCode 4 for iPhone Simulator
• How to use Storyboard to make popover that can be used in code?
• performSegueWithIdentifier and sharedData
• Turn off warnings coming from subprojects
• Xcode throws an exception in Main() in iOS 8 with 'all exceptions' breakpoint