Swift Post Concurrency Blog Post Code Example

Concurrency1.swift

let url = URL(string: "https://theswiftpost.co/")
if let url = url {
    showLoadingIndicator() // UI Operation; has to run on the main queue
    let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
        if error != nil {
            showErrorAlert(error) // UI operation; has to run on the main queue!!
        } else if let data = data {
            debugPrint(usableData) //JSONSerialization
        }
        debugPrint(“Completed”)
    }
}
task.resume()