TTTAttributedLabel didSelectLink在swift 4.0中没有呼叫

import TTTAttributedLabel

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let label = TTTAttributedLabel(frame: CGRect(x: 0, y: 0, width: 200, height: 50))
        label.text = "点击这里打开链接"
        label.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(labelTapped(_:))))
        label.isUserInteractionEnabled = true
        
        view.addSubview(label)
    }
    
    @objc func labelTapped(_ gesture: UITapGestureRecognizer) {
        guard let label = gesture.view as? TTTAttributedLabel else {
            return
        }
        
        let tappedLink = label.link(at: gesture.location(in: label))
        
        if let url = tappedLink?.result.url {
            // 处理链接点击事件，比如打开网页
            UIApplication.shared.open(url)
        }
    }
}