Example (Apple Official)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | let df = DateFormatter()df.dateStyle = .nonedf.timeStyle = .longcancellable = Timer.publish(every: 1.0, on: .main, in: .default) .autoconnect() .handleEvents(receiveOutput: { date in print ("Sending Timestamp \'\(df.string(from: date))\' to delay()") }) .delay(for: .seconds(3), scheduler: RunLoop.main, options: .none) .sink( receiveCompletion: { print ("completion: \($0)", terminator: "\n") }, receiveValue: { value in let now = Date() print ("At \(df.string(from: now)) received Timestamp \'\(df.string(from: value))\' sent: \(String(format: "%.2f", now.timeIntervalSince(value))) secs ago", terminator: "\n") } ) |