dispatch_after - GCD in Swift?

Question

I\'ve gone through the iBook from Apple, and couldn\'t find any definition of it:

Can someone explain the structure of dispatch_after?

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Answer 1

Delaying GCD call using asyncAfter in swift

let delayQueue = DispatchQueue(label: "com.theappmaker.in", qos: .userInitiated)
let additionalTime: DispatchTimeInterval = .seconds(2)

We can delay as **microseconds,milliseconds,nanoseconds

delayQueue.asyncAfter(deadline: .now() + 0.60) {
    print(Date())
}

delayQueue.asyncAfter(deadline: .now() + additionalTime) {
    print(Date())
}