Touches shorter than 0.1 seconds are detected as a tap, and touches longer than 0.1 seconds are canceled.

JustTapGestureRecognizer.swift

import UIKit

final class JustTapGestureRecognizer: UITapGestureRecognizer {
    private var timer: Timer?
    private let cancellationTimeInterval = TimeInterval(0.1)

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
        timer = Timer.scheduledTimer(withTimeInterval: cancellationTimeInterval, repeats: false) { [weak self] (_) in
            self?.state = .cancelled
        }
        super.touchesBegan(touches, with: event)
    }

    override func reset() {
        timer?.invalidate()
        timer = nil
        super.reset()
    }
}