How to program a delay in Swift 3

In earlier versions of Swift, one could create a delay with the following code:

let time = dispatch_time(dispatch_time_t(DISPATCH_TIME_NOW), 4 * Int64(NSEC_PER_SEC))
dispatch_after(time, dispatch_get_main_queue()) {
    //put your code which should be executed with a delay here
}

But now, in Swift 3, Xcode automatically changes 6 different things but then the following error appears: “Cannot convert DispatchTime.now to expected value dispatch_time_t aka UInt64.”

How can one create a delay before running a sequence of code in Swift 3?

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