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2014/10/15 ¤U¤È 10:11:15
iphone Programming Glossary: mallocRetrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage height CGImageGetHeight image CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB rawData malloc height width 4 bytesPerPixel 4 bytesPerRow bytesPerPixel width NSUInteger bitsPerComponent 8 CGContextRef..
Detect the specific iPhone/iPod touch model [duplicate] http://stackoverflow.com/questions/1108859/detect-the-specific-iphone-ipod-touch-model iPod touch 2G NSString platform size_t size sysctlbyname hw.machine NULL size NULL 0 char machine malloc size sysctlbyname hw.machine machine size NULL 0 NSString platform NSString stringWithCString machine..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale bytesPerPixel width CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB unsigned char rawData malloc height width 4 CGContextRef context CGBitmapContextCreate rawData width height bitsPerComponent bytesPerRow.. 4 int colors kGreen int m_width i.size.width int m_height i.size.height uint32_t rgbImage uint32_t malloc m_width m_height sizeof uint32_t CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef.. context CGColorSpaceRelease colorSpace now convert to grayscale uint8_t m_imageData uint8_t malloc m_width m_height for int y 0 y m_height y for int x 0 x m_width x uint32_t rgbPixel rgbImage y m_width..
Best way to serialize a NSData into an hexadeximal string http://stackoverflow.com/questions/1305225/best-way-to-serialize-a-nsdata-into-an-hexadeximal-string NSMutableString str NSMutableString stringWithCapacity 64 int length deviceToken length char bytes malloc sizeof char length deviceToken getBytes bytes length length for int i 0 i length i str appendFormat..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease.. Create a buffer to store bitmap data unitialized memory as long as the data self setPixelBitData malloc CFDataGetLength bitmapData Copy image data into allocated buffer CFDataGetBytes bitmapData CFRangeMake..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework at how A is allocated to get this maybe look up COMPLEX_SPLIT in the documentation. A.realp float malloc nOver2 sizeof float A.imagp float malloc nOver2 sizeof float Next it pre calculates everything that.. look up COMPLEX_SPLIT in the documentation. A.realp float malloc nOver2 sizeof float A.imagp float malloc nOver2 sizeof float Next it pre calculates everything that can be precalculated. note that if you are..
instruments with iOS: Why does Memory Monitor disagree with Allocations? http://stackoverflow.com/questions/5518918/instruments-with-ios-why-does-memory-monitor-disagree-with-allocations Resident Memory in VM Tracker Instrument. Allocation Instrument only marks the memory created by malloc NSObject alloc and some framework buffer for example decompressed image bitmap is not included in Allocation..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c C and Cocoa with a view to playing with the iPhone SDK. I'm reasonably comfortable with C's malloc and free concept but Cocoa's references counting scheme has me rather confused. I'm told it's very elegant.. is now zero then that object's memory is freed by the system. The basic way this differs from malloc and free is that any given object doesn't need to worry about other parts of the system crashing because..
How to convert NSData to byte array in iPhone? http://stackoverflow.com/questions/724086/how-to-convert-nsdata-to-byte-array-in-iphone NSData data NSData dataWithContentsOfFile filePath NSUInteger len data length Byte byteData Byte malloc len memcpy byteData data bytes len This code will dynamically allocate the array to the correct size.. also use getBytes len as indicated by others if you want to use a fixed length array. This avoids malloc free but is less extensible and more prone to buffer overflow issues so I rarely ever use it. share..
Is there an iPhone SDK API for twitter? http://stackoverflow.com/questions/757649/is-there-an-iphone-sdk-api-for-twitter
Get Exif data from UIImage - UIImagePickerController http://stackoverflow.com/questions/9766394/get-exif-data-from-uiimage-uiimagepickercontroller asset defaultRepresentation create a buffer to hold image data uint8_t buffer Byte malloc image_representation.size NSUInteger length image_representation getBytes buffer fromOffset 0.0 length..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage uiImage.CGImage NSUInteger width CGImageGetWidth image NSUInteger height CGImageGetHeight image CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB rawData malloc height width 4 bytesPerPixel 4 bytesPerRow bytesPerPixel width NSUInteger bitsPerComponent 8 CGContextRef context CGBitmapContextCreate rawData width height bitsPerComponent..
Detect the specific iPhone/iPod touch model [duplicate] http://stackoverflow.com/questions/1108859/detect-the-specific-iphone-ipod-touch-model iPhone 1G iPhone1 2 iPhone 3G iPod1 1 iPod touch 1G iPod2 1 iPod touch 2G NSString platform size_t size sysctlbyname hw.machine NULL size NULL 0 char machine malloc size sysctlbyname hw.machine machine size NULL 0 NSString platform NSString stringWithCString machine encoding NSUTF8StringEncoding free machine return platform..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale height CGImageGetHeight image NSUInteger bytesPerRow bytesPerPixel width CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB unsigned char rawData malloc height width 4 CGContextRef context CGBitmapContextCreate rawData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast kCGBitmapByteOrder32Big.. UIImage i int kRed 1 int kGreen 2 int kBlue 4 int colors kGreen int m_width i.size.width int m_height i.size.height uint32_t rgbImage uint32_t malloc m_width m_height sizeof uint32_t CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate rgbImage m_width m_height 8 m_width.. context CGRectMake 0 0 m_width m_height i CGImage CGContextRelease context CGColorSpaceRelease colorSpace now convert to grayscale uint8_t m_imageData uint8_t malloc m_width m_height for int y 0 y m_height y for int x 0 x m_width x uint32_t rgbPixel rgbImage y m_width x uint32_t sum 0 count 0 if colors kRed sum rgbPixel 24..
Best way to serialize a NSData into an hexadeximal string http://stackoverflow.com/questions/1305225/best-way-to-serialize-a-nsdata-into-an-hexadeximal-string to do it. NSString serializeDeviceToken NSData deviceToken NSMutableString str NSMutableString stringWithCapacity 64 int length deviceToken length char bytes malloc sizeof char length deviceToken getBytes bytes length length for int i 0 i length i str appendFormat @ 02.2hhX bytes i free bytes return str Thanks for your inputs...
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone Create RGB color space self setColorSpace CGColorSpaceCreateDeviceRGB if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease colorSpace return nil Create the bitmap context. Pre.. CGDataProviderCopyData CGImageGetDataProvider self CGImage Create a buffer to store bitmap data unitialized memory as long as the data self setPixelBitData malloc CFDataGetLength bitmapData Copy image data into allocated buffer CFDataGetBytes bitmapData CFRangeMake 0 CFDataGetLength bitmapData pixelByteData Cast a pointer..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework .compP nOver2 n 2 elts You would really need to look at how A is allocated to get this maybe look up COMPLEX_SPLIT in the documentation. A.realp float malloc nOver2 sizeof float A.imagp float malloc nOver2 sizeof float Next it pre calculates everything that can be precalculated. note that if you are doing this in real.. really need to look at how A is allocated to get this maybe look up COMPLEX_SPLIT in the documentation. A.realp float malloc nOver2 sizeof float A.imagp float malloc nOver2 sizeof float Next it pre calculates everything that can be precalculated. note that if you are doing this in real code you probably want to do this once..
instruments with iOS: Why does Memory Monitor disagree with Allocations? http://stackoverflow.com/questions/5518918/instruments-with-ios-why-does-memory-monitor-disagree-with-allocations The memory really loaded into device's physical memory is the Resident Memory in VM Tracker Instrument. Allocation Instrument only marks the memory created by malloc NSObject alloc and some framework buffer for example decompressed image bitmap is not included in Allocation Instrument but it always takes most of your memory...
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c and Objective C I'm just beginning to have a look at Objective C and Cocoa with a view to playing with the iPhone SDK. I'm reasonably comfortable with C's malloc and free concept but Cocoa's references counting scheme has me rather confused. I'm told it's very elegant once you understand it but I'm just not over the hump.. is decremented. If after calling release the reference count is now zero then that object's memory is freed by the system. The basic way this differs from malloc and free is that any given object doesn't need to worry about other parts of the system crashing because you've freed memory they were using. Assuming everyone..
How to convert NSData to byte array in iPhone? http://stackoverflow.com/questions/724086/how-to-convert-nsdata-to-byte-array-in-iphone the pointer and copy each byte up to a specified length . Try NSData data NSData dataWithContentsOfFile filePath NSUInteger len data length Byte byteData Byte malloc len memcpy byteData data bytes len This code will dynamically allocate the array to the correct size you must free byteData when you're done and copy the bytes..
Is there an iPhone SDK API for twitter? http://stackoverflow.com/questions/757649/is-there-an-iphone-sdk-api-for-twitter
Get Exif data from UIImage - UIImagePickerController http://stackoverflow.com/questions/9766394/get-exif-data-from-uiimage-uiimagepickercontroller resultBlock ^ ALAsset asset ALAssetRepresentation image_representation asset defaultRepresentation create a buffer to hold image data uint8_t buffer Byte malloc image_representation.size NSUInteger length image_representation getBytes buffer fromOffset 0.0 length image_representation.size error nil if length 0 buffer NSData..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage image NSUInteger height CGImageGetHeight image CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB rawData malloc height width 4 bytesPerPixel 4 bytesPerRow bytesPerPixel width NSUInteger bitsPerComponent 8 CGContextRef context CGBitmapContextCreate..
Detect the specific iPhone/iPod touch model [duplicate] http://stackoverflow.com/questions/1108859/detect-the-specific-iphone-ipod-touch-model touch 1G iPod2 1 iPod touch 2G NSString platform size_t size sysctlbyname hw.machine NULL size NULL 0 char machine malloc size sysctlbyname hw.machine machine size NULL 0 NSString platform NSString stringWithCString machine encoding NSUTF8StringEncoding..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale bytesPerRow bytesPerPixel width CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB unsigned char rawData malloc height width 4 CGContextRef context CGBitmapContextCreate rawData width height bitsPerComponent bytesPerRow colorSpace kCGImageAlphaPremultipliedLast.. kGreen 2 int kBlue 4 int colors kGreen int m_width i.size.width int m_height i.size.height uint32_t rgbImage uint32_t malloc m_width m_height sizeof uint32_t CGColorSpaceRef colorSpace CGColorSpaceCreateDeviceRGB CGContextRef context CGBitmapContextCreate.. i CGImage CGContextRelease context CGColorSpaceRelease colorSpace now convert to grayscale uint8_t m_imageData uint8_t malloc m_width m_height for int y 0 y m_height y for int x 0 x m_width x uint32_t rgbPixel rgbImage y m_width x uint32_t sum 0..
Best way to serialize a NSData into an hexadeximal string http://stackoverflow.com/questions/1305225/best-way-to-serialize-a-nsdata-into-an-hexadeximal-string NSData deviceToken NSMutableString str NSMutableString stringWithCapacity 64 int length deviceToken length char bytes malloc sizeof char length deviceToken getBytes bytes length length for int i 0 i length i str appendFormat @ 02.2hhX bytes i free..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone CGColorSpaceCreateDeviceRGB if colorSpace NSLog @ Error allocating color space. return nil self setPixelData malloc byteCount if pixelData NSLog @ Error allocating bitmap memory. Releasing color space. CGColorSpaceRelease colorSpace return.. self CGImage Create a buffer to store bitmap data unitialized memory as long as the data self setPixelBitData malloc CFDataGetLength bitmapData Copy image data into allocated buffer CFDataGetBytes bitmapData CFRangeMake 0 CFDataGetLength..
How to convert an NSString to hex values http://stackoverflow.com/questions/3056757/how-to-convert-an-nsstring-to-hex-values encoding NSASCIIStringEncoding autorelease NSString stringToHex NSString str NSUInteger len str length unichar chars malloc len sizeof unichar str getCharacters chars NSMutableString hexString NSMutableString alloc init for NSUInteger i 0 i len..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework really need to look at how A is allocated to get this maybe look up COMPLEX_SPLIT in the documentation. A.realp float malloc nOver2 sizeof float A.imagp float malloc nOver2 sizeof float Next it pre calculates everything that can be precalculated... to get this maybe look up COMPLEX_SPLIT in the documentation. A.realp float malloc nOver2 sizeof float A.imagp float malloc nOver2 sizeof float Next it pre calculates everything that can be precalculated. note that if you are doing this in real..
instruments with iOS: Why does Memory Monitor disagree with Allocations? http://stackoverflow.com/questions/5518918/instruments-with-ios-why-does-memory-monitor-disagree-with-allocations memory is the Resident Memory in VM Tracker Instrument. Allocation Instrument only marks the memory created by malloc NSObject alloc and some framework buffer for example decompressed image bitmap is not included in Allocation Instrument..
How to make one color transparent on a UIImage? http://stackoverflow.com/questions/633722/how-to-make-one-color-transparent-on-a-uiimage int mWidth CGImageGetWidth ref int mHeight CGImageGetHeight ref int count mWidth mHeight 4 void bufferdata malloc count CGColorSpaceRef colorSpaceRef CGColorSpaceCreateDeviceRGB CGBitmapInfo bitmapInfo kCGBitmapByteOrderDefault CGColorRenderingIntent..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c have a look at Objective C and Cocoa with a view to playing with the iPhone SDK. I'm reasonably comfortable with C's malloc and free concept but Cocoa's references counting scheme has me rather confused. I'm told it's very elegant once you understand.. the reference count is now zero then that object's memory is freed by the system. The basic way this differs from malloc and free is that any given object doesn't need to worry about other parts of the system crashing because you've freed memory..
How to convert NSData to byte array in iPhone? http://stackoverflow.com/questions/724086/how-to-convert-nsdata-to-byte-array-in-iphone length . Try NSData data NSData dataWithContentsOfFile filePath NSUInteger len data length Byte byteData Byte malloc len memcpy byteData data bytes len This code will dynamically allocate the array to the correct size you must free byteData.. into it. You could also use getBytes len as indicated by others if you want to use a fixed length array. This avoids malloc free but is less extensible and more prone to buffer overflow issues so I rarely ever use it. share improve this answer..
Is there an iPhone SDK API for twitter? http://stackoverflow.com/questions/757649/is-there-an-iphone-sdk-api-for-twitter
How to find the cause of a malloc “double free” error? http://stackoverflow.com/questions/971249/how-to-find-the-cause-of-a-malloc-double-free-error to find the cause of a malloc &ldquo double free&rdquo error I'm programming an application in Objective C and I'm getting this error MyApp 2121 0xb0185000.. free&rdquo error I'm programming an application in Objective C and I'm getting this error MyApp 2121 0xb0185000 malloc error for object 0x1068310 double free set a breakpoint in malloc_error_break to debug It is happening when I release an.. C and I'm getting this error MyApp 2121 0xb0185000 malloc error for object 0x1068310 double free set a breakpoint in malloc_error_break to debug It is happening when I release an NSAutoreleasePool and I can't figure out what object I'm releasing..
Get Exif data from UIImage - UIImagePickerController http://stackoverflow.com/questions/9766394/get-exif-data-from-uiimage-uiimagepickercontroller image_representation asset defaultRepresentation create a buffer to hold image data uint8_t buffer Byte malloc image_representation.size NSUInteger length image_representation getBytes buffer fromOffset 0.0 length image_representation.size..
Clear MKMapView's cache of tiles? http://stackoverflow.com/questions/1917257/clear-mkmapviews-cache-of-tiles and pan around within that zoomed in area. There are two levels of MKMapView tile cache. One manifests itself as a Malloc ~196kb in Instruments the other is NSData store of varying sizes. The Malloc appears to be the active in use tiles and there.. tile cache. One manifests itself as a Malloc ~196kb in Instruments the other is NSData store of varying sizes. The Malloc appears to be the active in use tiles and there is a hard cap on how many can be allocated. In my app that number is 16..
Running NSTimer Within an NSThread? http://stackoverflow.com/questions/2083737/running-nstimer-within-an-nsthread on the main thread runLoop with application autoreleasepool. I am getting leak at timerNSPool release GeneralBlock 16 Malloc WebCore WKSetCurrentGraphicsContext What causing the Leak is updating UI from a secondary thread timeLabel.text NSString..
http://stackoverflow.com/questions/3484022/memory-leak-for-uiimageview tool Leak And there are two leaks reported Leaked Object # Address Size Responsible Library Responsible Frame Malloc 128 Bytes 0x72186d0 128 ImageIO BuildPluginListPurple Malloc 128 Bytes 0x4712000 128 CoreGraphics open_handle_to_dylib_path.. # Address Size Responsible Library Responsible Frame Malloc 128 Bytes 0x72186d0 128 ImageIO BuildPluginListPurple Malloc 128 Bytes 0x4712000 128 CoreGraphics open_handle_to_dylib_path So....What is happening Thanks iphone memory leaks share..
EXC_BAD_ACCESS on device, but fine on Simulator http://stackoverflow.com/questions/3583728/exc-bad-access-on-device-but-fine-on-simulator to see that no Zombies are messaged which would have been my first suggestion. The next thing to do is Enable Guard Malloc and then read this http developer.apple.com iphone library documentation Performance Conceptual ManagingMemory Articles.. then read this http developer.apple.com iphone library documentation Performance Conceptual ManagingMemory Articles MallocDebug.html You can only do this in the simulator your goal is to use the extra sensitive heap to make the bug throw EXC_BAD_ACCESS..
http://stackoverflow.com/questions/4956413/reg-modifying-layer-that-is-being-finalized-calayer-frame-message-sen points to UIKit # Category Event Type RefCt Timestamp Address Size Responsible Library Responsible Caller 0 CALayer Malloc 1 25304068864 0x10837840 48 UIKit UIView _createLayerWithFrame 1 CALayer Zombie 1 99780847872 0x10837840 0 UIKit UIView..
MkMapView rame et fuite mémoire apple http://stackoverflow.com/questions/5935243/mkmapview-rame-et-fuite-memoire-apple une vue séparée qui contenait la MkMapView Dans tous les cas le résultat est le même Les fuites sont les suivantes Malloc 16 Bytes _NSCFDictionary Malloc 16 Bytes Pour les 3 la librairie responsable est GMM et la frame responsable est CreateImageRefFromTileData.. la MkMapView Dans tous les cas le résultat est le même Les fuites sont les suivantes Malloc 16 Bytes _NSCFDictionary Malloc 16 Bytes Pour les 3 la librairie responsable est GMM et la frame responsable est CreateImageRefFromTileData Voil si vous.. via Interface Builder In a separate view which contained the MkMapView In all cases the result is the same Leaks are Malloc Malloc _NSCFDictionary 16 Bytes 16 Bytes For the 3 library is responsible for GMM and the frame is responsible CreateImageRefFromTileData..
http://stackoverflow.com/questions/9436854/guard-malloc-doesnt-work Malloc doesn't work I'm experimenting with different profiling options that Xcode provides but when I enabling Guard Malloc option.. Malloc doesn't work I'm experimenting with different profiling options that Xcode provides but when I enabling Guard Malloc option in Diagnostics tab and trying to run I'm getting this error with immediate crash dyld could not load inserted library.. I've created link and started Command Line Tool just to be sure because it apparently part of MacOS SDK enabled Guard Malloc again but the problem remains. I don't quite get where is a problem does it new Xcode 4.3 inadvertence problem with my system..
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