Swift version: 5.6
URLSession
is designed to make network transfers as easy as possible, and a great example of that is its downloadTask
()` method. This fetches the contents of a URL you specify, saves it to a local file, then calls a completion handler so you can manipulate the file – all in one.
To demonstrate this, here’s some code to download the source code to the apple.com homepage:
let url = URL(string: "https://www.apple.com")!
let task = URLSession.shared.downloadTask(with: url) { localURL, urlResponse, error in
if let localURL = localURL {
if let string = try? String(contentsOf: localURL) {
print(string)
}
}
}
task.resume()
There are a few important things to note in there:
resume()
on it to make it happen.URLSession
on your behalf.SAVE 50% To celebrate WWDC23, all our books and bundles are half price, so you can take your Swift knowledge further without spending big! Get the Swift Power Pack to build your iOS career faster, get the Swift Platform Pack to builds apps for macOS, watchOS, and beyond, or get the Swift Plus Pack to learn advanced design patterns, testing skills, and more.
Available from iOS 7.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Link copied to your pasteboard.