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
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Available from iOS 7.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
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