“Initializer element is not a compile-time constant” why?

by

Because [NSArray arrayWithArray: self.container.objects ] isn’t a compile-time constant, it’s an expression that must be evaluated at runtime. In C and Objective-C, static variables inside functions must be initialized with compile-time constants, whereas C++ and Objective-C++ are more lenient and allow non-compile-time constants.

Either compile your code as Objective-C++, or refactor it into something like this:

static NSArray *localArray = nil;
if (localArray == nil)
    localArray = [NSArray arrayWithArray: self.container.objects ];

Which is fairly similar to the code that the compiler would generate under the hood for a static variable initialized with a non-compile-time constant anyways (in actuality, it would use a second global flag indicating if the value was initialized, rather than using a sentinel value like nil here; in this case, we are assuming that localArray will never be nil). You can check out your compiler’s disassembly for that if you want.

More Related Contents:

  1. is possible to convert soap web services to xml format? [closed]
  2. build failed with: ld: duplicate symbol _OBJC_CLASS_$_Algebra5FirstViewController
  3. Xcode intellisense meaning of letters in colored boxes like f,T,C,M,P,C,K,# etc
  4. ViewController respondsToSelector: message sent to deallocated instance (CRASH)
  5. Xcode doesn’t show the line that causes a crash
  6. presentViewController: crash on iOS
  7. applications expected to have a root view controller console
  8. Xcode 4 “Clean” vs. “Clean Build Folder”
  9. iOS taking photo programmatically
  10. What does the “Couldn’t compile connection:” error mean?
  11. Move UIView up when the keyboard appears in iOS
  12. Getting ARP table on iPhone/iPad
  13. Prototype Cells in a nib instead of a storyboard
  14. Custom dealloc and ARC (Objective-C)
  15. RootViewController Switch Transition Animation
  16. ‘+entityForName: nil is not a legal NSManagedObjectContext parameter – Core Data
  17. Support different orientation for only one view iOS 6
  18. iOS Screenshot part of the screen
  19. How to set a timeout with AFNetworking
  20. Sharing with iOS 6.0 native Facebook integration: “Posted via my app name”?
  21. Play Audio iOS Objective-C
  22. Fire local notification every day on different times
  23. How to enable the new Objective-C object literals on iOS?
  24. applicationWillTerminate not getting called on force quit of iOS app
  25. Xcode linker error: file too small for architecture x86_64
  26. iOS: store two NSMutableArray in a .plist file
  27. IBOutletCollection set ordering in Interface Builder
  28. Is there any limit in storing values in NSUserDefaults?
  29. resizing a UIImage without loading it entirely into memory?
  30. Register UncaughtExceptionHandler in Objective C using NSSetUncaughtExceptionHandler

Leave a Comment