Swift 5:向GestureRecognizer发送函数时更改标签错误

import UIKit

class ViewController: UIViewController {
    
    let label = UILabel()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 设置标签
        label.text = "初始文本"
        label.frame = CGRect(x: 100, y: 100, width: 200, height: 50)
        view.addSubview(label)
        
        // 创建手势识别器
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap))
        
        // 将手势识别器添加到视图
        view.addGestureRecognizer(tapGesture)
    }
    
    @objc func handleTap() {
        // 确保在主线程上更新UI
        DispatchQueue.main.async {
            self.label.text = "点击后更新"
        }
    }
}