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POstatic behaviour->objective C
 

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  1. POstatic behaviour->objective C
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    <p>I have this <code>static</code> declaration of <code>m_pData=1099656</code> in a <code>class</code>.</p> <p>In <code>main</code> <code>NSLog(@"Testing:%d",m_pData);</code></p> <p>Its printing me <code>0</code>. </p> <p>How to get the same value of <code>m_pData</code> in the class in the main function too.</p> <p>I cant use <code>obj.m_pData</code> or <code>obj-&gt;m_pData</code> to acces the variable.</p> <p>EDITED:</p> <pre><code>test2.m ---------- #import &lt;Foundation/Foundation.h&gt; #import "data_derived.h" int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; data* dat = [data alloc]; requestSession* session = [requestSession alloc]; [session init]; [dat TxCreateImage:RM_REQUEST_SESSION]; NSLog(@"Testing:%d",m_pData); //the static variable is not printing the value its holding.Its printing Zero.If printed the same variable inside the class it gives some numbers. [dat dataBuffer:&amp;m_pData withLen:&amp;m_uDataSize]; //here the actual values of static values are not passed.when printed both of them contains zero values. [pool drain]; return 0; } data.h -------- #import &lt;Foundation/Foundation.h&gt; #import "remote.h" static int m_nMessageId; //Message ID static int m_uSessionId; //Session ID static int m_chSequenceChar; //Sequence ID static int* m_pData; //Integer buffer to carry data static int m_uDataSize; //Datasize @interface data : NSObject { @public } - (id)initWithID:(int) uMessageId withData:(id)pData withSize:(size_t) uDataSize; + (void)initialize; - (void)dealloc; - (id) dataBuffer:(int**)m_Data withLen:(int**)uLen; - (BOOL) TxCreateImage:(int)messageId; @end data.m --------- #import "data.h" #define ENCODED_MSG_DATA_OFFSET 8 @implementation data + (void)initialize { m_uSessionId = 0; m_chSequenceChar= 0; // Initialize values from derived class m_nMessageId = 0; m_pData = 0; m_uDataSize = 0; } - (id) initWithID:(int) uMessageId withData:(id)pData withSize:(size_t) uDataSize { if(self=[super init]) { // Initialize the member variables m_uSessionId = 0xFF; m_chSequenceChar= 10; // Initialize values from derived class m_nMessageId = uMessageId; m_pData = (int*)pData; m_uDataSize = (int)uDataSize; } NSLog(@"Data size:%d",uDataSize); NSLog(@"m_pData:%d",m_pData); NSLog(@"pData:%d",pData); return self; } - (id) dataBuffer:(int**)m_Data withLen:(int**)uLen { if ( m_uDataSize &lt;= RMH_MAX_ENCODED_LENGTH ) { int abBigEndian[RMH_MESSAGE_MAX_SIZE]; memcpy(abBigEndian,m_Data,m_uDataSize); NSLog(@"m_Data:%d",*m_Data); NSLog(@"abBigEndian:%d",abBigEndian); uLen += ENCODED_CRC_BYTE_LEN + 1; NSLog(@"%d",*uLen); } NSLog(@"END!"); return self; } - (BOOL) TxCreateImage:(int)messageId { char pData[4096]; sprintf(pData,"%x %d %d %d %x",ASCII_STX,m_uSessionId,m_chSequenceChar,m_nMessageId,ASCII_ETX); //uLen = ENCODED_MSG_DATA_OFFSET; NSLog(@"%s",pData); return YES; } - (void)dealloc { [super dealloc]; } @end data_derived.h --------------------- #import &lt;Foundation/Foundation.h&gt; #import "data.h" #define DECLARE_RS232_NEWMSG(ClassID)\ enum \ { \ ID = ClassID \ }; \ @interface requestSession : data { @public DECLARE_RS232_NEWMSG(RM_REQUEST_SESSION); struct RMH_REQUEST_SESSION_MSG st; } -(id)init; -(void)dealloc; @end data_derived.m --------------------- #import "data_derived.h" @implementation requestSession - (id)init { size_t asize = sizeof(st); st.uDeviceID = RS232_PROTOCOL_DEVICE_ID; st.uProtocolVersion = RS232_VERSION; memset(st.uReserved,0x00,sizeof(st.uReserved)); NSLog(@"Address of the structure:%d",&amp;st); self=[super initWithID:ID withData:(id)&amp;st withSize:asize]; if (self) { } return self; } - (void)dealloc { [super dealloc]; } @end </code></pre>
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