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2014/10/15 ¤U¤È 10:04:58
iphone Programming Glossary: cfarrayNSFetchedResultsController with sections created by first letter of a string http://stackoverflow.com/questions/1112521/nsfetchedresultscontroller-with-sections-created-by-first-letter-of-a-string NSArray tempPropertyArray NSArray arrayWithObject nameInitialProperty NSARRAY tempPropertyArray RETURNS CFArray 0xf54090 0x30307a00 type immutable count 1 values 0 NSAttributeDescription 0xf2df80 name committeeNameInitial isOptional..
http://stackoverflow.com/questions/1539017/nsarray-with-c-types is going to be you can do this . 1 NSArray cannot handle general C types. If you're interested in this kind of thing CFArray can be outfitted with custom callbacks for storing other kinds of data. Caveat Normally you can pass a CFArray to any NSArray.. thing CFArray can be outfitted with custom callbacks for storing other kinds of data. Caveat Normally you can pass a CFArray to any NSArray taking API they're bridged. This does not apply to CFArrays with custom callbacks. 2 CGLayerRef is not any.. of data. Caveat Normally you can pass a CFArray to any NSArray taking API they're bridged. This does not apply to CFArrays with custom callbacks. 2 CGLayerRef is not any old C type it's a CFType. CFType is bridged to NSObject. Sending retain..
Break on EXC_BAD_ACCESS in XCode? http://stackoverflow.com/questions/1622079/break-on-exc-bad-access-in-xcode 15 12 14 jasonsmacbook TestProject 1289 CGContextDrawPath invalid context 2009 10 25 15 12 14.680 LanderTest 1289 207 CFArray objectAtIndex message sent to deallocated instance 0x3c4e610 Now I am attempting to draw to the context I retrieve from..
Disadvantage of using NSMutableArray vs NSArray? http://stackoverflow.com/questions/1746204/disadvantage-of-using-nsmutablearray-vs-nsarray once if it can. Behind the scenes they're secretly the same thing NSArray and NSMutableArray are both implemented with CFArray s via toll free bridging a CFMutableArrayRef and a CFArrayRef are typedef's of the same thing __CFArray NSArray and NSMutableArray.. thing NSArray and NSMutableArray are both implemented with CFArray s via toll free bridging a CFMutableArrayRef and a CFArrayRef are typedef's of the same thing __CFArray NSArray and NSMutableArray should have the same performance complexity access.. with CFArray s via toll free bridging a CFMutableArrayRef and a CFArrayRef are typedef's of the same thing __CFArray NSArray and NSMutableArray should have the same performance complexity access time being O lg N at worst and O 1 at best..
Non-retaining array for delegates http://stackoverflow.com/questions/4692161/non-retaining-array-for-delegates ingenius using a Category to allow the creation of a mutable array that does no retain release by backing it with a CFArray with proper callbacks. @implementation NSMutableArray WeakReferences id mutableArrayUsingWeakReferences return self mutableArrayUsingWeakReferencesWithCapacity.. self mutableArrayUsingWeakReferencesWithCapacity 0 id mutableArrayUsingWeakReferencesWithCapacity NSUInteger capacity CFArrayCallBacks callbacks 0 NULL NULL CFCopyDescription CFEqual We create a weak reference array return id CFArrayCreateMutable.. capacity CFArrayCallBacks callbacks 0 NULL NULL CFCopyDescription CFEqual We create a weak reference array return id CFArrayCreateMutable 0 capacity callbacks @end EDIT Found the original article http ofcodeandmen.poltras.com share improve this..
http://stackoverflow.com/questions/806115/toll-free-bridges
The model used to open the store is incompatible with the one used to create the store http://stackoverflow.com/questions/8881453/the-model-used-to-open-the-store-is-incompatible-with-the-one-used-to-create-the 0x1839b38 type immutable dict count 7 entries 2 CFString 0x8829b90 0x1839b38 contents NSStoreModelVersionIdentifiers CFArray 0x8829ff0 0x1839b38 type immutable count 0 values 4 CFString 0x8829bc0 0x1839b38 contents NSPersistenceFrameworkVersion..
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