Created
March 15, 2018 20:51
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| public class Throttler { | |
| private let queue: DispatchQueue = DispatchQueue.global(qos: .background) | |
| private var job: DispatchWorkItem = DispatchWorkItem(block: {}) | |
| private var previousRun: Date = Date.distantPast | |
| private var maxInterval: TimeInterval | |
| public init(maxInterval: TimeInterval) { | |
| self.maxInterval = maxInterval | |
| } | |
| public func throttle(block: @escaping () -> ()) { | |
| job.cancel() | |
| job = DispatchWorkItem(){ [weak self] in | |
| self?.previousRun = Date() | |
| block() | |
| } | |
| let delay = Date().timeIntervalSince(previousRun) > maxInterval ? 0 : maxInterval | |
| queue.asyncAfter(deadline: .now() + Double(delay), execute: job) | |
| } | |
| } |
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