zixun / anreye Goto Github PK

    while self.isCancelled == false {
        self.isMainThreadBlock = true
        DispatchQueue.main.async {
            self.isMainThreadBlock = false
            self.semaphore.signal()
        }
        
        Thread.sleep(forTimeInterval: self.threshold)
        if self.isMainThreadBlock  {
            self.handler?()
        }
        
        self.semaphore.wait(timeout: DispatchTime.distantFuture)
    }