Invoke model method with block that will run on the main thread

Question

one of the central tenets of the architecture of my latest app is that I\'m going to call methods on the app\'s model which will be async and accept failure and success scen

Answer 1

If you are using GCD, you can use the "get main queue":

dispatch_queue_t dispatch_get_main_queue()

Call this inside an async dispatch. i.e.

dispatch_async(dispatch_get_main_queue(), ^{
  /* Do somthing here with UIKit here */
})

The example block above could be running in an async background queue and the example code would send the UI work off to the main thread.