Core data doesn't work in iOS 4.3
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06-06-2021 - |
Question
I have a problem with my core data. It's running in iOS 5.0 and higher fine but when i run it in iOS 4.3 It crash, it crash on the line __managedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType];
Does somebody can help me ?
2012-05-08 17:01:21.617 [7489:10e03] -[NSManagedObjectContext initWithConcurrencyType:]: unrecognized selector sent to instance 0x4ddc6c0
2012-05-08 17:01:21.650 [7489:10e03] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSManagedObjectContext initWithConcurrencyType:]: unrecognized selector sent to instance 0x4ddc6c0'
*** Call stack at first throw:
(
0 CoreFoundation 0x0111e5a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x0153c313 objc_exception_throw + 44
2 CoreFoundation 0x011200bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x0108f966 ___forwarding___ + 966
4 CoreFoundation 0x0108f522 _CF_forwarding_prep_0 + 50
5 0x00002a42 -[AppDelegate managedObjectContext] + 194
6 0x00003736 -[HomeViewController fetchFeedDataIntoDocument] + 134
7 Amsterdam 0x0000417d -[HomeViewController refresh] + 45
8 Amsterdam 0x0000803f -[MBProgressHUD launchExecution] + 143
9 Foundation 0x00ae2cf4 -[NSThread main] + 81
10 Foundation 0x00ae2c80 __NSThread__main__ + 1387
11 libsystem_c.dylib 0x93393ed9 _pthread_start + 335
12 libsystem_c.dylib 0x933976de thread_start + 34
)
terminate called throwing an exception(lldb)
La solution
initWithConcurrencyType:NSMainQueueConcurrencyType is new is 5.0
http://developer.apple.com/library/ios/#releasenotes/General/iOS50APIDiff/index.html
You need to check for version before using it.
You will need to check the version and use init instead for earlier versions.
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