Size of the NSInputStream buffer

Question

I\'m trying to use NSInputStream for receiving data using TCP socket connection. On the server side I send data size before sending of the data itself

Answer 1

In your code, readBufferRef is defined as a "pointer to a pointer" but never allocated, and therefore it is the NULL pointer.

What you should do is to pass the address of an UnsafeMutablePointer<UInt8> as an inout argument to the function (assuming Swift 2):

var readBufferRef: UnsafeMutablePointer<UInt8> = nil
var readBufferLengthRef = 0
let readBufferIsAvailable = inputStream.getBuffer(&readBufferRef, length: &readBufferLengthRef)

On return, readBufferRef is set to the read buffer of the stream (valid until the next read operation), and readBufferLengthRef contains the number of available bytes.