I'm an iOS and Mac developer.
Any and all of my contributions on the StackExchange family of websites should be considered in the public domain. Modifications to any of my contributions on the StackExchange family of websites by other individuals may be subject to other copyright which I have no authority to waive. If your jurisdiction does not recognize the aforementioned waiver of copyright, I hereby grant you a royalty-free, worldwide, non-exclusive and transferrable license to use any of my contributions to the StackExchange family of websites. You also agree that by using my contributions. I hereby disclaim any warranties, including the implied warranties of fitness for a particular purpose, and merchantability for any and all of my contributions.