Beginning Networking with URLSession

Sep 13 2022 · Swift 5.6, iOS 15, Xcode 13.4.1

Part 1: Introduction to URLSession & Concurrency

04. Challenge: Run Code on the Main Thread

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Previous episode: 03. More Modern Concurrency Next episode: 05. Session Configurations

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Notes: 04. Challenge: Run Code on the Main Thread

Concurrency - The Swift Programming Language

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Welcome to the fourth episode! We haven’t talked about URLSession yet, but don’t worry, that is coming up in the next video.

await MainActor.run {
  print("Found the title. Are we on the main thread? \(Thread.isMainThread)")
  print(line)
}
@MainActor func printTitleAnnotated(url: URL) async throws {
  for try await line in url.lines {
    if line.contains("<title>") {
      print("Found the title. Are we on the main thread? \(Thread.isMainThread)")
      print(line)
      
      return
    }
  }
}
Task {
  print("Starting task. Are we on the main thread? \(Thread.isMainThread)")
  
  try await printTitleAnnotated(url: URL(string: "https://www.raywenderlich.com")!)
}