Gwynne Raskind: In Mike Ash’s article in 2008, circa Leopard, he described three major issues. Of those, only one has been solved since (the missing context parameter to observation removal). The other two, a lack of custom selectors and the uselessness of the context pointer, remain unsolved, and more issues have arisen since… […] It … Continue reading Key-Value Observing Done Right: Take 2