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POunrecognised selector sent to instance-Objective C
 

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  1. POunrecognised selector sent to instance-Objective C
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    <p>I am new to Objective C.I am trying out a simple program.Got an exception.Could not able </p> <p>to fix it up.</p> <h3>packet.h</h3> <pre><code>#import &lt;Foundation/Foundation.h&gt; #define RS232_PROTOCOL_DEVICE_ID 0xD8 #define RS232_MAJOR_REV (1) #define RS232_MINOR_REV (23) #define RS232_VERSION (RS232_MAJOR_REV * 10000 + RS232_MINOR_REV) struct msg { int deviceId; int version; int reserved[5]; }a; enum { RMH_MESSAGE_MAX_SIZE =4096 }; @interface Packet : NSObject { unsigned char m_abTxMsgImage[RMH_MESSAGE_MAX_SIZE]; unsigned int m_nTxImageSize; }; + (void)initialize; - (void)send; @end </code></pre> <h3>packet.m</h3> <pre><code>#import "Packet.h" @implementation Packet - (id)init { if (self=[super init]) { m_nTxImageSize=0; } return self; } + (void)initialize { a.deviceId =RS232_PROTOCOL_DEVICE_ID; a.version = RS232_VERSION; a.reserved[0]=0; a.reserved[1]=0; a.reserved[2]=0; a.reserved[3]=0; a.reserved[4]=0; } - (void)send { NSLog(@"DeviceId:%d VersionNo:%d",a.deviceId,a.version); } @end </code></pre> <h3>data.h</h3> <pre><code>#import &lt;Foundation/Foundation.h&gt; #define ENCODED_MSG_DATA_OFFSET 8 #define ENCODED_CRC_BYTE_LEN 4 #define ASCII_STX 0x02 typedef enum { eRs232MsgStatus_Valid } eRs232MsgStatus; @interface data : NSObject { //char tmp[100]; //char tmp1[101]; int m_uSessionId; int m_chSequenceChar; int m_nMessageId; int m_uVersion; } - (BOOL) TxCreateImage:(int*)pData :(int)uLen; @end </code></pre> <h3>data.m</h3> <pre><code>#import "data.h" @implementation data - (BOOL)TxCreateImage:(int*)pData :(int)uLen { NSLog(@"Hello!"); sprintf((char *)pData,"%c%02X%c%02X%02X",ASCII_STX,m_uSessionId,m_chSequenceChar,m_nMessageId,m_uVersion); uLen = ENCODED_MSG_DATA_OFFSET; uLen += ENCODED_CRC_BYTE_LEN + 1; return YES; } @end </code></pre> <h3>main.m</h3> <pre><code>#import &lt;Foundation/Foundation.h&gt; #import "Packet.h" #import "data.h" int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; Packet* pack = [[Packet alloc]init]; [pack send]; data* dat = [[data alloc]init]; [dat TxCreateImage:(int*)[pack m_abTxMsgImage] :[pack m_nTxImageSize]]; [pool drain]; return 0; } </code></pre> <p>Output</p> <pre><code>2011-05-04 17:34:00.006 Test-packetCreation[4982:a0f] DeviceId:216 VersionNo:10023 2011-05-04 17:34:00.009 Test-packetCreation[4982:a0f] -[Packet m_nTxImageSize]: unrecognized selector sent to instance 0x100831e00 2011-05-04 17:34:00.009 Test-packetCreation[4982:a0f] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Packet m_nTxImageSize]: unrecognized selector sent to instance 0x100831e00' *** Call stack at first throw: ( 0 CoreFoundation 0x00007fff84aaccc4 __exceptionPreprocess + 180 1 libobjc.A.dylib 0x00007fff8167b0f3 objc_exception_throw + 45 2 CoreFoundation 0x00007fff84b06140 +[NSObject(NSObject) doesNotRecognizeSelector:] + 0 3 CoreFoundation 0x00007fff84a7ecdf ___forwarding___ + 751 4 CoreFoundation 0x00007fff84a7ae28 _CF_forwarding_prep_0 + 232 5 Test-packetCreation 0x0000000100001aed main + 209 6 Test-packetCreation 0x0000000100001a14 start + 52 7 ??? 0x0000000000000001 0x0 + 1 ) terminate called after throwing an instance of 'NSException' Program received signal: gSIGABRTh. sharedlibrary apply-load-rules all </code></pre>
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    1. USPeter Štibraný
    1. USAngus
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    1. COpossible duplicate of [Getting Exceptions in function call-Objective C](http://stackoverflow.com/questions/5882745/getting-exceptions-in-function-call-objective-c)
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    2. COYou have asked exactly the same question a few minutes ago. Please edit your original question instead of posting a new one.
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      1. USDarkDust
    3. CO@DarkDust:Sorry the question i asked was only a small part of it and was not the entire code.I thought it would be difficult to debug the error without the entire code and have posted as a new one here.
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      1. USAngus
 

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