Skip to content

Instantly share code, notes, and snippets.

@shanecowherd
Created August 4, 2020 20:30
Show Gist options
  • Save shanecowherd/3e0c9cedc9afde5f55eb79d6fdeef99a to your computer and use it in GitHub Desktop.
Save shanecowherd/3e0c9cedc9afde5f55eb79d6fdeef99a to your computer and use it in GitHub Desktop.
class AsyncOperation: Operation {
var completion: () -> Void
init(completion: @escaping () -> Void) {
self.completion = completion
}
override func main() {
let waitForFinish = DispatchGroup()
waitForFinish.enter()
if isCancelled { waitForFinish.leave(); return }
CoolAsyncFunction {
waitForFinish.leave()
}
waitForFinish.wait()
completion()
if self.isCancelled { return }
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment