如何检测UIViewController外部的轻触/触摸

// 创建手势识别器
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(_:)))

// 将手势识别器添加到view上
self.view.addGestureRecognizer(tapGesture)

// 手势回调方法
@objc func handleTap(_ gesture: UITapGestureRecognizer) {
    // 处理轻触事件
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    super.touchesBegan(touches, with: event)
    
    // 处理触摸事件
}

class CustomWindow: UIWindow {
    override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
        let result = super.hitTest(point, with: event)
        
        if result == self.rootViewController?.view {
            // 触摸点在UIViewController的view外部
            // 处理触摸事件
        }
        
        return result
    }
}

// 在AppDelegate中设置自定义窗口
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    self.window = CustomWindow(frame: UIScreen.main.bounds)
    self.window?.rootViewController = YourViewController()
    self.window?.makeKeyAndVisible()
    return true
}