我有一个如下所示的函数：
func receivedData(pChData: UInt8,andLength len: CInt) {
var receivedData: Byte = Byte()
var receivedDataLength: CInt = 0
memcpy(&receivedData,&pChData,Int(len)); // Getting the error here
receivedDataLength = len
AudioHandler.sharedInstance.receiverAudio(&receivedData,WithLen: receivedDataLength)
}
得到错误：
Cannot pass immutable value as inout argument: ‘pChData’ is a ‘let’ constant
虽然我在这里传递的参数都不是常量.我为什么要这个？
