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2014/10/15 ¤U¤È 10:14:37
iphone Programming Glossary: structuresMemory Management in Objective-C [duplicate] http://stackoverflow.com/questions/106627/memory-management-in-objective-c a pointer to an Objective C object and treat it as an array Are you forced to use NSArray and NSMutableArray for data structures I know these are pretty newbie questions thanks for any help you can offer me. iphone objective c cocoa memory memory management..
NSManagedObjectContext performBlockAndWait: doesn't execute on background thread? http://stackoverflow.com/questions/11831946/nsmanagedobjectcontext-performblockandwait-doesnt-execute-on-background-thread in the calling thread. So when I say it does not use the internal queue that does not mean it does not use the data structures at all. It must synchronize the call with the blocks already on the queue and those submitted in other threads and other..
How do I initialize a store with default data in a CoreData application? http://stackoverflow.com/questions/1264382/how-do-i-initialize-a-store-with-default-data-in-a-coredata-application document which you can then save out to disk and add as a resource to your iPhone application. The SQLite database structures are fully compatible between the desktop and iPhone Core Data implementations so I've found that this is a quick and easy..
What's the difference between KERN_INVALID_ADDRESS and KERN_PROTECTION_FAILURE? http://stackoverflow.com/questions/1282428/whats-the-difference-between-kern-invalid-address-and-kern-protection-failure
Common multithreading mistakes beginners make on iPhone http://stackoverflow.com/questions/1357108/common-multithreading-mistakes-beginners-make-on-iphone Dispatch is not yet available on iPhone OS iOS 4.0 just added blocks and GCD because it makes a strong case for using structures like NSOperation and NSOperationQueue as an alternative to manually created threads. For information on manually created..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone are quite nice as well. The complicated part although not very hard is to convert your managed objects into suitable structures for the conversion. I wrote this real quick so it may have an error or two The methods you call are NSString jsonStructureFromManagedObjects..
iPhone OpenGL ES - How to Pick http://stackoverflow.com/questions/2540447/iphone-opengl-es-how-to-pick matrix retrieved from current openGL state. Here is how I do it IMPoint2D and IMPoint3D are basic x y and x y z structures IMPoint2D getScreenCoorOfPoint IMPoint3D _point3D GLfloat p 16 Where The 16 Doubles Of The Projection Matrix Are To Be..
What's the best way to put a c-struct in an NSArray? http://stackoverflow.com/questions/4516991/whats-the-best-way-to-put-a-c-struct-in-an-nsarray the best way to put a c struct in an NSArray What's the usual way to store c structures in an NSArray Advantages disadvantages memory handling Notably what's the difference between valueWithBytes and valueWithPointer.. way iphone objective c cocoa struct nsarray share improve this question NSValue doesn't only support CoreGraphics structures you can use it for your own too. I would recommend doing so as the class is probably lighter weight than NSData for simple.. it for your own too. I would recommend doing so as the class is probably lighter weight than NSData for simple data structures. Simply use an expression like the following NSValue valueWithBytes p objCType @encode Megapoint And to get the value back..
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now work and then updating the UI when done. Also my Molecules application uses background threads for processing new structures with a status bar that is updated as this progresses. You can download the source code to see how I achieved this. share..
Send and receive NSData via GameKit http://stackoverflow.com/questions/4837102/send-and-receive-nsdata-via-gamekit and if so How do I do it successfully and How do you split files up into multiple packets iphone objective c data structures nsdata gamekit share improve this question To add on What you ought to do here is make an NSObject subclass to represent..
What do “Dirty” and “Resident” mean in relation to Virtual Memory? http://stackoverflow.com/questions/5176074/what-do-dirty-and-resident-mean-in-relation-to-virtual-memory which the garbage collector has to look at and then decide what to do with it. Depending on how you build your data structures you could cause the garbage collector to mark a lot of memory as dirty having each garbage collection cycle take longer..
Creating a JSON Store For iPhone http://stackoverflow.com/questions/5237943/creating-a-json-store-for-iphone and query that using predicates Or perhaps use SQLite as a BLOB store with manually created indexes on the JSON structures Or should I stop whining and use Core Data Help appreciated. iphone json core data persistence store share improve this..
How can I improve the performance of my custom OpenGL ES 2.0 depth texture generation? http://stackoverflow.com/questions/6051237/how-can-i-improve-the-performance-of-my-custom-opengl-es-2-0-depth-texture-gener have an open source iOS application that uses custom OpenGL ES 2.0 shaders to display 3 D representations of molecular structures. It does this by using procedurally generated sphere and cylinder impostors drawn over rectangles instead of these same..
http://stackoverflow.com/questions/806115/toll-free-bridges how TFB works iphone objective c osx core share improve this question Toll free bridging means that the data structures are interchangeable. It is just as simple as casting that's the toll free part. Anyplace you can use the type on one side..
Coordinates all wrong on iPhone 3G? It could be your compiler http://stackoverflow.com/questions/8391307/coordinates-all-wrong-on-iphone-3g-it-could-be-your-compiler point to a problem in the armv6 Thumb code produced by XCode 4.2's compiler which cause arithmetic on certain data structures in particular CGPoint to return completely wrong results. Such as the x value being written into the y value. The solution..
http://stackoverflow.com/questions/9569466/nscoding-vs-core-data XML JSON objects as they are for later use. Other approach would be to regenerate this data from your internal data structures see above every time you need it. If you design your data model yourself I see even less point to use plists but maybe somebody..
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