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Original file line number Diff line number Diff line change
Expand Up @@ -18,8 +18,8 @@ final class DisplayTracker {
}

func start() {
CVDisplayLinkCreateWithActiveCGDisplays(&cvLink)
guard let link = cvLink else { return }
CVDisplayLinkCreateWithActiveCGDisplays(&self.cvLink)
guard let link = self.cvLink else { return }
CVDisplayLinkSetOutputHandler(link) { [weak self] _, _, _, _, _ in
DispatchQueue.main.async { self?.tick() }
return kCVReturnSuccess
Expand All @@ -28,8 +28,8 @@ final class DisplayTracker {
}

func stop() {
guard let link = cvLink else { return }
guard let link = self.cvLink else { return }
CVDisplayLinkStop(link)
cvLink = nil
self.cvLink = nil
}
}
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