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2014/10/15 ¤U¤È 10:12:48
iphone Programming Glossary: poolAES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone it wouldn't make sense to print such values. int main int argc const char argv NSAutoreleasePool pool NSAutoreleasePool alloc init NSString key @ my password NSString secret @ text to encrypt NSData plain.. UTF8String printf s n NSString alloc initWithData plain encoding NSUTF8StringEncoding UTF8String pool drain return 0 Given this code and the fact that encrypted data will not always translate nicely into..
How to programatically check whether a keyboard is present in iphone app? http://stackoverflow.com/questions/1490573/how-to-programatically-check-whether-a-keyboard-is-present-in-iphone-app KeyboardStateListener sharedInstance return sharedInstance void load NSAutoreleasePool pool NSAutoreleasePool alloc init sharedInstance self alloc init pool release BOOL isVisible return _isVisible.. void load NSAutoreleasePool pool NSAutoreleasePool alloc init sharedInstance self alloc init pool release BOOL isVisible return _isVisible void didShow _isVisible YES void didHide _isVisible NO id init..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd dispatch to anything other than the main queue Grand central dispatch will manage an autorelease pool per queue automatically. However there are no guarantees as to when the pool will be drained it may.. manage an autorelease pool per queue automatically. However there are no guarantees as to when the pool will be drained it may be after one block is processed it may be after hundreds but probably won't be.. since you are targeting a memory constrained environment then you should be creating and draining pools. The documentation has been updated. SEe https developer.apple.com library ios DOCUMENTATION General..
Difference between [NSMutableArray array] vs [[NSMutableArray alloc] init] http://stackoverflow.com/questions/5423211/difference-between-nsmutablearray-array-vs-nsmutablearray-alloc-init and under your control. The problem here is that autoreleased objects live in the autorelease pool and can pile up until the pool is drained whenever that may be. Another thing to watch out for is loops... problem here is that autoreleased objects live in the autorelease pool and can pile up until the pool is drained whenever that may be. Another thing to watch out for is loops. You may generate autoreleased.. You may generate autoreleased objects without being aware of it and they just pile up in the pool. The solution is to create your own autorelease pool at the start of the loop and release it at the..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown Do nothing assume returned object value will be valid in local scope until inner most release pool is drained attributed with ns_returns_autoreleased The call to methodForSelector assumes that the return..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 GL_TEXTURE_2D CVOpenGLESTextureGetName renderTexture 0 This pulls a pixel buffer from the pool associated with my asset writer input creates and associates a texture with it and uses that texture.. in practice when compared to using glReadPixels although less than I see with the pixel buffer pool I use with AVAssetWriter. It's a shame that none of this is documented anywhere because it provides..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone the state of the data at various points in a real application it wouldn't make sense to print such values. int main int argc const char argv NSAutoreleasePool pool NSAutoreleasePool alloc init NSString key @ my password NSString secret @ text to encrypt NSData plain secret dataUsingEncoding NSUTF8StringEncoding NSData cipher.. cipher AES256DecryptWithKey key printf s n plain description UTF8String printf s n NSString alloc initWithData plain encoding NSUTF8StringEncoding UTF8String pool drain return 0 Given this code and the fact that encrypted data will not always translate nicely into an NSString it may be more convenient to write two methods..
How to programatically check whether a keyboard is present in iphone app? http://stackoverflow.com/questions/1490573/how-to-programatically-check-whether-a-keyboard-is-present-in-iphone-app sharedInstance @implementation KeyboardStateListener KeyboardStateListener sharedInstance return sharedInstance void load NSAutoreleasePool pool NSAutoreleasePool alloc init sharedInstance self alloc init pool release BOOL isVisible return _isVisible void didShow _isVisible YES void didHide _isVisible NO.. KeyboardStateListener sharedInstance return sharedInstance void load NSAutoreleasePool pool NSAutoreleasePool alloc init sharedInstance self alloc init pool release BOOL isVisible return _isVisible void didShow _isVisible YES void didHide _isVisible NO id init if self super init NSNotificationCenter center NSNotificationCenter..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd you need to create an NSAutoreleasePool within each block you dispatch to anything other than the main queue Grand central dispatch will manage an autorelease pool per queue automatically. However there are no guarantees as to when the pool will be drained it may be after one block is processed it may be after hundreds but.. other than the main queue Grand central dispatch will manage an autorelease pool per queue automatically. However there are no guarantees as to when the pool will be drained it may be after one block is processed it may be after hundreds but probably won't be . So if you are only allocating a few objects don't worry.. if you are allocating any significant number of objects and since you are targeting a memory constrained environment then you should be creating and draining pools. The documentation has been updated. SEe https developer.apple.com library ios DOCUMENTATION General Conceptual ConcurrencyProgrammingGuide OperationQueues OperationQueues.html#..
Difference between [NSMutableArray array] vs [[NSMutableArray alloc] init] http://stackoverflow.com/questions/5423211/difference-between-nsmutablearray-array-vs-nsmutablearray-alloc-init and release because this keeps the lifetime of the object short and under your control. The problem here is that autoreleased objects live in the autorelease pool and can pile up until the pool is drained whenever that may be. Another thing to watch out for is loops. You may generate autoreleased objects without being aware.. the lifetime of the object short and under your control. The problem here is that autoreleased objects live in the autorelease pool and can pile up until the pool is drained whenever that may be. Another thing to watch out for is loops. You may generate autoreleased objects without being aware of it and they just pile up.. whenever that may be. Another thing to watch out for is loops. You may generate autoreleased objects without being aware of it and they just pile up in the pool. The solution is to create your own autorelease pool at the start of the loop and release it at the end of the loop so that the objects are released each time thru..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown in the init copy family or attributed with ns_returns_retained Do nothing assume returned object value will be valid in local scope until inner most release pool is drained attributed with ns_returns_autoreleased The call to methodForSelector assumes that the return value of the method it's calling is an object but does..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 glFramebufferTexture2D GL_FRAMEBUFFER GL_COLOR_ATTACHMENT0 GL_TEXTURE_2D CVOpenGLESTextureGetName renderTexture 0 This pulls a pixel buffer from the pool associated with my asset writer input creates and associates a texture with it and uses that texture as a target for my FBO. Once I've rendered a frame I lock the.. raw pixel extraction. It also experiences a significant speedup in practice when compared to using glReadPixels although less than I see with the pixel buffer pool I use with AVAssetWriter. It's a shame that none of this is documented anywhere because it provides a huge boost to video capture performance. share improve this..
How to save the content in UIWebView for faster loading on next launch? http://stackoverflow.com/questions/1343515/how-to-save-the-content-in-uiwebview-for-faster-loading-on-next-launch NSLog @ ignoring cache for @ request return cacheResponse void populateCacheFor NSURLRequest request NSAutoreleasePool pool NSAutoreleasePool alloc init NSArray paths NSSearchPathForDirectoriesInDomains NSDocumentDirectory NSUserDomainMask YES.. nil error error ok content writeToFile storagePath atomically YES NSLog @ Caching @ @ storagePath ok @ OK @ KO pool release @end And the use of it in your application NSArray paths NSSearchPathForDirectoriesInDomains NSDocumentDirectory..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone in a real application it wouldn't make sense to print such values. int main int argc const char argv NSAutoreleasePool pool NSAutoreleasePool alloc init NSString key @ my password NSString secret @ text to encrypt NSData plain secret dataUsingEncoding.. s n plain description UTF8String printf s n NSString alloc initWithData plain encoding NSUTF8StringEncoding UTF8String pool drain return 0 Given this code and the fact that encrypted data will not always translate nicely into an NSString it may..
How to programatically check whether a keyboard is present in iphone app? http://stackoverflow.com/questions/1490573/how-to-programatically-check-whether-a-keyboard-is-present-in-iphone-app KeyboardStateListener KeyboardStateListener sharedInstance return sharedInstance void load NSAutoreleasePool pool NSAutoreleasePool alloc init sharedInstance self alloc init pool release BOOL isVisible return _isVisible void didShow _isVisible.. return sharedInstance void load NSAutoreleasePool pool NSAutoreleasePool alloc init sharedInstance self alloc init pool release BOOL isVisible return _isVisible void didShow _isVisible YES void didHide _isVisible NO id init if self super init..
iPhone App Localization - English problems? http://stackoverflow.com/questions/3308519/iphone-app-localization-english-problems it so it looks something like below put in your own tests for NZ or AU int main int argc char argv NSAutoreleasePool pool NSAutoreleasePool alloc init Set up the locale jiggery pokery NSString language NSLocale preferredLanguages objectAtIndex.. NSArray arrayWithObjects @ en_GB @ en nil forKey @ AppleLanguages int retVal UIApplicationMain argc argv nil nil pool release return retVal This pops the users language eg en into the language NSString and the users locale eg NZ GB AU into..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd within each block you dispatch to anything other than the main queue Grand central dispatch will manage an autorelease pool per queue automatically. However there are no guarantees as to when the pool will be drained it may be after one block is.. dispatch will manage an autorelease pool per queue automatically. However there are no guarantees as to when the pool will be drained it may be after one block is processed it may be after hundreds but probably won't be . So if you are only.. of objects and since you are targeting a memory constrained environment then you should be creating and draining pools. The documentation has been updated. SEe https developer.apple.com library ios DOCUMENTATION General Conceptual ConcurrencyProgrammingGuide..
Difference between [NSMutableArray array] vs [[NSMutableArray alloc] init] http://stackoverflow.com/questions/5423211/difference-between-nsmutablearray-array-vs-nsmutablearray-alloc-init of the object short and under your control. The problem here is that autoreleased objects live in the autorelease pool and can pile up until the pool is drained whenever that may be. Another thing to watch out for is loops. You may generate.. your control. The problem here is that autoreleased objects live in the autorelease pool and can pile up until the pool is drained whenever that may be. Another thing to watch out for is loops. You may generate autoreleased objects without.. watch out for is loops. You may generate autoreleased objects without being aware of it and they just pile up in the pool. The solution is to create your own autorelease pool at the start of the loop and release it at the end of the loop so that..
Why is autorelease especially dangerous/expensive for iPhone applications? http://stackoverflow.com/questions/613583/why-is-autorelease-especially-dangerous-expensive-for-iphone-applications OS Note Because on iPhone OS an application executes in a more memory constrained environment the use of autorelease pools is discouraged in methods or blocks of code for example loops where an application creates many objects. Instead you should.. avoiding it altogether. and now for my comment It sounds like there is a certain amount of overhead in maintaining the pool. I read this article which would lead me to probably avoid autorelease as much as possible because I prefer things to be..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown with ns_returns_retained Do nothing assume returned object value will be valid in local scope until inner most release pool is drained attributed with ns_returns_autoreleased The call to methodForSelector assumes that the return value of the method..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 GL_COLOR_ATTACHMENT0 GL_TEXTURE_2D CVOpenGLESTextureGetName renderTexture 0 This pulls a pixel buffer from the pool associated with my asset writer input creates and associates a texture with it and uses that texture as a target for my.. a significant speedup in practice when compared to using glReadPixels although less than I see with the pixel buffer pool I use with AVAssetWriter. It's a shame that none of this is documented anywhere because it provides a huge boost to video..
Implementing Unit Testing with the iPhone SDK http://stackoverflow.com/questions/2002330/implementing-unit-testing-with-the-iphone-sdk the unit test has created. Then when I expand on the first error I get this PhaseScriptExecution Run Script build 3D Pool.build Debug iphonesimulator LogicTests.build Script 1A6BA6AE10F28F40008AC2A8.sh cd Users james Desktop FYP 3D Pool setenv.. 3D Pool.build Debug iphonesimulator LogicTests.build Script 1A6BA6AE10F28F40008AC2A8.sh cd Users james Desktop FYP 3D Pool setenv ACTION build setenv ALTERNATE_GROUP staff ... setenv XCODE_VERSION_MAJOR 0300 setenv XCODE_VERSION_MINOR 0320 setenv.. 0300 setenv XCODE_VERSION_MINOR 0320 setenv YACC Developer usr bin yacc bin sh c Users james Desktop FYP 3D Pool build 3D Pool.build Debug iphonesimulator LogicTests.build Script 1A6BA6AE10F28F40008AC2A8.sh Developer Tools RunPlatformUnitTests.include..
What's the difference between sending -release or -drain to an Autorelease Pool? http://stackoverflow.com/questions/797419/whats-the-difference-between-sending-release-or-drain-to-an-autorelease-pool the difference between sending release or drain to an Autorelease Pool In many Books and on many Sites I see drain. Well for an Autorelease Pool that sounds cool. But does it do anything other.. sending release or drain to an Autorelease Pool In many Books and on many Sites I see drain. Well for an Autorelease Pool that sounds cool. But does it do anything other than an release I would guess drain just makes the Pool to release all it's.. an Autorelease Pool that sounds cool. But does it do anything other than an release I would guess drain just makes the Pool to release all it's objects without releasing the Pool itself. Just a guess. iphone cocoa cocoa touch memory management..
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