Access information from Byte Array using its index

I am using a byte array to开发者_StackOverflow社区 store Nsdata of(4840 bytes) and nnow i have to access the data at index of byte array.here is my code .

[Bufferdata appendBytes:&data length:len]; 
Byte *byteArray = (Byte *)[data bytes];

for(int i=0;i< sizeof(byteArray);i++)   
**NSLog(@"BYTES %@",[byteArray objectAtIndex:i])**;

but it is giving BAD ACCESS

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The byteArray pointer you get back from [data bytes] is a pointer to raw bytes, not an object pointer. Since it doesn't point to an object, you can't use it to send messages like [byteArray objectAtIndex:i]. Instead, you should do something like:

for(int i=0;i< sizeof(byteArray);i++)   
    NSLog(@"BYTES %c", byteArray[i]);