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Replacing NSTimers with dispatch timers
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Paul Tsochantaris
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Paul Tsochantaris
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Jan 31, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,32 +1,27 @@ | ||
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| #if os(iOS) | ||
| import UIKit | ||
| #endif | ||
| import Foundation | ||
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| final class PopTimer { | ||
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| private var _popTimer: Timer? | ||
| private let _timeInterval: TimeInterval | ||
| private let _callback: () -> Void | ||
| private var popTimer: Timer? | ||
| private let timeInterval: TimeInterval | ||
| private let callback: Completion | ||
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| func push() { | ||
| _popTimer?.invalidate() | ||
| _popTimer = Timer.scheduledTimer(timeInterval: _timeInterval, target: self, selector: #selector(popped), userInfo: nil, repeats: false) | ||
| } | ||
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| @objc | ||
| func popped() { | ||
| invalidate() | ||
| _callback() | ||
| popTimer?.invalidate() | ||
| popTimer = Timer(repeats: false, interval: timeInterval) { [weak self] in | ||
| self?.invalidate() | ||
| self?.callback() | ||
| } | ||
| } | ||
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| func invalidate() { | ||
| _popTimer?.invalidate() | ||
| _popTimer = nil | ||
| popTimer?.invalidate() | ||
| popTimer = nil | ||
| } | ||
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| init(timeInterval: TimeInterval, callback: @escaping Completion) { | ||
| _timeInterval = timeInterval | ||
| _callback = callback | ||
| self.timeInterval = timeInterval | ||
| self.callback = callback | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
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| import Foundation | ||
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| final class Timer { | ||
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| private let timer = DispatchSource.makeTimerSource(flags: [], queue: DispatchQueue.main) | ||
| private let completion: Completion | ||
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| init(repeats: Bool, interval: TimeInterval, block: @escaping Completion) { | ||
| completion = block | ||
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| if repeats { | ||
| timer.scheduleRepeating(deadline: .now() + interval, interval: interval) | ||
| } else { | ||
| timer.scheduleOneshot(deadline: .now() + interval) | ||
| } | ||
| timer.setEventHandler(handler: completion) | ||
| timer.resume() | ||
| } | ||
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| func invalidate() { | ||
| timer.cancel() | ||
| } | ||
| } |
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