CODEWITHSUNDEEP
objective-c
spandana
spandana

Reputation: 755

Request for member 'pData' with BOOL value TRUE is not a structure or union-Objective C

I could not use the pData[4096] to pass it to the other function from main.

data.m
------
@implementation data
static int msgID;
static char pData[4096]="\0";

+ (void)initialize
{
 //some initialisations
msgID =123;
}

-(void)SwapEndian:(uint8_t*)pData withBOOLValue:(BOOL)bIsAlreadyLittleEndian
{
  NSLog("%s %s",pData,bIsAlreadyLittleEndian);
}
@end

main.m
-------

[dat SwapEndian:dat.pData withBOOLValue:TRUE];

I am getting pData undeclared. As pData is declared as static inside the Data

implementation i tried with dat.pData to pass it from main.But when i do it i am getting

Request for member 'pData' with BOOL value TRUE is not a structure or union.

Upvotes: 1

Views: 96

Answers (1)

James Eichele
James Eichele

Reputation: 119144

It is difficult to determine what the code is supposed to do, but here is how to create an Objective-C object that holds an integer identifier and a 4096-character array. Please note that this sort of thing is usually discouraged. Unless you have a really specific reason for using int and char[], the identifier should be NSInteger and the data should be an NSData or NSString object.

I have also used some of the "standard" naming conventions. If you are writing Cocoa code, it helps to drink a lot of the Kool-Aid.

Message.h: 

@interface Message : NSObject
{
    int identifier;
    char data[4096];
}
@property (nonatomic, assign) int indentifier;
@property (nonatomic, readonly) char * data;
- (void)swapEndian:(BOOL)flag;
@end

Message.m: 

@implementation Message

@synthesize identifier;
@synthesize data;

- (id)init
{
    if ((self = [super init]) == nil) { return nil; }
    identifier = 0;
    data[0] = '\0';
    return self;
}

- (void)swapEndian:(BOOL)flag
{
    NSLog(@"%s %d", data, flag);
}

@end

main.m: 

#import "Message.h"

...

Message * message = [[[Message alloc] init] autorelease];
message.identifier = 123;
[message swapEndian:YES];

Upvotes: 1

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