Store hex value in NSData

Question

I am confused about how to store a hex value in NSData. I want the value that I will be storing to be 0x0F .

Please can someone give me an example?

Answer 1

Here's how I did it before:

 UInt8 j= 0x0f; NSData *data = [[[NSData alloc] initWithBytes:&j length:sizeof(j)] autorelease]; 

Answer 2

You can create an array to store hexadecimal values, and then use it to create data:

 unsigned char bytes[] = {0x0F}; NSData *data = [NSData dataWithBytes:bytes length:1]; 

This can be rewritten as:

 NSData *data = [NSData dataWithBytes:(unsigned char[]){0x0F} length:1];