Question

Please tell me how to convert bytes to NSInteger/int in objective-c in iPhone programming?

Answer 1

What do you mean by “Bytes”?
If you want convert single byte representing integer value to int (or NSInteger) type, just use “=”:

Byte b = 123;
NSInteger x;
x = b;

as Byte (the same as unsigned char – 1 byte unsigned integer) and NSInteger (the same as int – 4 bytes signed integer) are both of simple integer types and can be converted automatically. Your should read more about “c data types” and “conversion rules“.
for example http://www.exforsys.com/tutorials/c-language/c-programming-language-data-types.html

If you want to convert several bytes storing some value to int, then convertion depends on structure of these data: how many bytes per value, signed or unsigned.