Convert a two byte UInt8 array to a UInt16 in Swift

Question

With Swift I want to convert bytes from a uint8_t array to an integer.

\"C\" Example:

char bytes[2] = {0x01, 0x02};
NSData *data = [NSData dataWithBy         


        

Answer 1

If the bytes are in an NSData object you may do (assume data:NSData):

var number: UInt16 = 0
data.getBytes(&number, length: sizeof(UInt16))

The getBytes method writes up to two bytes in the memory location of number (similar to C's memcpy. This won't crash your app if data hasn't enough bytes.

(edit: no need to use range if starting from beginning of buffer)