I wrote about my Essentials snippers 4 years ago. I am still using them, slightly updated and modernised but they are still one of the first stops to choose what I need when I start a particular UIKit project. One advanced feature in there is AsyncOperation which a subclass of Operation which will not set itself to finished until the asynchronous task you give it is done. OperationQueue and Operation were a staple of my code for a very long time, whenever I needed to be sure things are being ...
