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2014/10/15 ¤U¤È 10:15:22

iphone Programming Glossary: uint8_t

Convert image to grayscale

http://stackoverflow.com/questions/1298867/convert-image-to-grayscale

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.. 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 sum count free rgbImage convert from a gray scale image back into a UIImage uint8_t result uint8_t calloc m_width m_height sizeof uint32_t 1 process the image back to rgb for int i 0 i..

Verify receipt for in App purchase

http://stackoverflow.com/questions/1298998/verify-receipt-for-in-app-purchase

BOOL verifyReceipt SKPaymentTransaction transaction NSString jsonObjectString self encode uint8_t transaction.transactionReceipt.bytes length transaction.transactionReceipt.length NSString completeString.. responseString integerValue responseString release return response 0 NSString encode const uint8_t input length NSInteger length static char table ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.. NSMutableData data NSMutableData dataWithLength length 2 3 4 uint8_t output uint8_t data.mutableBytes for NSInteger i 0 i length i 3 NSInteger value 0 for NSInteger j i..

AES interoperability between .Net and iPhone?

http://stackoverflow.com/questions/538435/aes-interoperability-between-net-and-iphone

bug in it... . The iPhone code uses 0 for IV. Initialization vector dummy in this case 0's. uint8_t iv kChosenCipherBlockSize memset void iv 0x0 size_t sizeof iv openssl by default prepends a randomly..

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..

Convert image to grayscale

http://stackoverflow.com/questions/1298867/convert-image-to-grayscale

NO CGContextDrawImage 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.. 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.. 16 255 count if colors kBlue sum rgbPixel 8 255 count m_imageData y m_width x sum count free rgbImage convert from a gray scale image back into a UIImage uint8_t result uint8_t calloc m_width m_height sizeof uint32_t 1 process the image back to rgb for int i 0 i m_height m_width i result i 4 0 int val m_imageData i result..

Verify receipt for in App purchase

http://stackoverflow.com/questions/1298998/verify-receipt-for-in-app-purchase

Refactoring et. al is left as an exercise for the readership BOOL verifyReceipt SKPaymentTransaction transaction NSString jsonObjectString self encode uint8_t transaction.transactionReceipt.bytes length transaction.transactionReceipt.length NSString completeString NSString stringWithFormat @ http url for your php receipt.. responseData encoding NSUTF8StringEncoding NSInteger response responseString integerValue responseString release return response 0 NSString encode const uint8_t input length NSInteger length static char table ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 NSMutableData data NSMutableData dataWithLength length.. NSInteger length static char table ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 NSMutableData data NSMutableData dataWithLength length 2 3 4 uint8_t output uint8_t data.mutableBytes for NSInteger i 0 i length i 3 NSInteger value 0 for NSInteger j i j i 3 j value 8 if j length value 0xFF input j NSInteger..

AES interoperability between .Net and iPhone?

http://stackoverflow.com/questions/538435/aes-interoperability-between-net-and-iphone

due to the wrapper code that you pointed at which has a serious bug in it... . The iPhone code uses 0 for IV. Initialization vector dummy in this case 0's. uint8_t iv kChosenCipherBlockSize memset void iv 0x0 size_t sizeof iv openssl by default prepends a randomly generated salt which is why the output is longer . The openssl..

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..

Iphone - How to encrypt NSData with public key and decrypt with private key?

http://stackoverflow.com/questions/10072124/iphone-how-to-encrypt-nsdata-with-public-key-and-decrypt-with-private-key

UIViewController SecKeyRef publicKey SecKeyRef privateKey NSData publicTag NSData privateTag void encryptWithPublicKey uint8_t plainBuffer cipherBuffer uint8_t cipherBuffer void decryptWithPrivateKey uint8_t cipherBuffer plainBuffer uint8_t plainBuffer.. SecKeyRef privateKey NSData publicTag NSData privateTag void encryptWithPublicKey uint8_t plainBuffer cipherBuffer uint8_t cipherBuffer void decryptWithPrivateKey uint8_t cipherBuffer plainBuffer uint8_t plainBuffer SecKeyRef getPublicKeyRef SecKeyRef.. privateTag void encryptWithPublicKey uint8_t plainBuffer cipherBuffer uint8_t cipherBuffer void decryptWithPrivateKey uint8_t cipherBuffer plainBuffer uint8_t plainBuffer SecKeyRef getPublicKeyRef SecKeyRef getPrivateKeyRef void testAsymmetricEncryptionAndDecryption..

Convert image to grayscale

http://stackoverflow.com/questions/1298867/convert-image-to-grayscale

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.. 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.. 8 255 count m_imageData y m_width x sum count free rgbImage convert from a gray scale image back into a UIImage uint8_t result uint8_t calloc m_width m_height sizeof uint32_t 1 process the image back to rgb for int i 0 i m_height m_width i..

Verify receipt for in App purchase

http://stackoverflow.com/questions/1298998/verify-receipt-for-in-app-purchase

exercise for the readership BOOL verifyReceipt SKPaymentTransaction transaction NSString jsonObjectString self encode uint8_t transaction.transactionReceipt.bytes length transaction.transactionReceipt.length NSString completeString NSString stringWithFormat.. NSInteger response responseString integerValue responseString release return response 0 NSString encode const uint8_t input length NSInteger length static char table ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 NSMutableData.. NSMutableData data NSMutableData dataWithLength length 2 3 4 uint8_t output uint8_t data.mutableBytes for NSInteger i 0 i length i 3 NSInteger value 0 for NSInteger j i j i 3 j value 8 if..

AES interoperability between .Net and iPhone?

http://stackoverflow.com/questions/538435/aes-interoperability-between-net-and-iphone

at which has a serious bug in it... . The iPhone code uses 0 for IV. Initialization vector dummy in this case 0's. uint8_t iv kChosenCipherBlockSize memset void iv 0x0 size_t sizeof iv openssl by default prepends a randomly generated salt which..

Get Exif data from UIImage - UIImagePickerController

http://stackoverflow.com/questions/9766394/get-exif-data-from-uiimage-uiimagepickercontroller

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..