swift 单指旋转图片，超简单（已封存，开箱即用）

使用方法：

let oneRotate = UIOneFingerRotationGes(target: self, action: #selector(oneFingerRotateAction(ges:)))        
compassImgV.addGestureRecognizer(oneRotate)

   @objc private func oneFingerRotateAction(ges: UIOneFingerRotationGes) {
        compassImgV.transform = compassImgV.transform.rotated(by: ges.rotation)
    }

工具类：

//  Created by hdf on 2022/3/31.

import UIKit

class UIOneFingerRotationGes: UIGestureRecognizer {

    var rotation: CGFloat = 0.0
    
    override func touchesBegan(_ touches: Set, with event: UIEvent) {
        if (event.touches(for: self)?.count ?? 0) > 1 {
            self.state = .failed
        }
    }
    
    override func touchesMoved(_ touches: Set, with event: UIEvent) {
        if self.state == .possible {
            self.st