14 lines
596 B
Swift
14 lines
596 B
Swift
import PromiseKit
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/// Delay the execution of the promise constructed in `body` by `delay` seconds.
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public func withDelay<T>(_ delay: TimeInterval, completionQueue: DispatchQueue, body: @escaping () -> Promise<T>) -> Promise<T> {
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#if DEBUG
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assert(Thread.current.isMainThread) // Timers don't do well on background queues
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#endif
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let (promise, seal) = Promise<T>.pending()
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Timer.scheduledTimer(withTimeInterval: delay, repeats: false) { _ in
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body().done(on: completionQueue) { seal.fulfill($0) }.catch(on: completionQueue) { seal.reject($0) }
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}
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return promise
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}
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