Converting NSData to int

Question

I\'ve an NSData object, the length is 4 bytes .These four bytes i\'m extracting from another NSData object using ,

fourByteData=[completeData subdataWithRang         


        

Answer 1

That statement would give you the first 16 bytes of data, not 4. To get the first 4 bytes you need to modify your statement to:

fourByteData = [completeData subdataWithRange:NSMakeRange(0, 4)];

To read the data from the NSData Object to an integer you could do something like:

int theInteger;
[completeData getBytes:&theInteger length:sizeof(theInteger)];

You do not need to get the first 4 bytes if you are just converting it to an integer. You can do this directly from the two lines above and your completeData receiver