问自定义形状UIButton

EN

class ClockView: UIView {
    override func awakeFromNib() {
        super.awakeFromNib()
        addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(tapClock)))
    }

@objc private func tapClock (tapGestureRecognizer: UITapGestureRecognizer) {
    let touchPoint = tapGestureRecognizer.location(in: self)

    let delta = CGPoint(x: center.x - touchPoint.x, y: center.y - touchPoint.y)
    let distance = hypotf(Float(delta.x), Float(delta.y))
    //Ignore points outside circle
    guard distance < Float(min (frame.width / 2, frame.height / 2)) else {
        return
    }
    let angle = atan2f(Float(delta.y), Float(delta.x))
    let proportion = angle / (Float.pi * 2) + 0.5
    let hour = (Int(proportion * 12) + 3) % 12 + 1
    print (hour)
}