writeToFile how to tell when it is completed

Question

I\'m doing some writing of data to my documents directory and I was wondering if there is a way to tell when my writeToFile method completes and the file I am creating has b

Answer 1

Swift 5:

do {
    try data.write(to: path)
    // here's when write operation is completed without errors thrown
} catch {
    Swift.print(error)
}