反转UIBarButtonItem"播放"以用作后退按钮？

// 创建一个UIButton对象，并设置其图像或标题
let backButton = UIButton(type: .system)
backButton.setImage(UIImage(named: "play"), for: .normal)

// 创建一个UIBarButtonItem对象，并将其自定义视图设置为UIButton
let backButtonItem = UIBarButtonItem(customView: backButton)

// 将UIBarButtonItem添加到导航栏
navigationItem.leftBarButtonItem = backButtonItem

// 在按钮的点击事件中执行后退操作
backButton.addTarget(self, action: #selector(backButtonTapped), for: .touchUpInside)

@objc func backButtonTapped() {
    // 执行后退操作，例如使用导航控制器的popViewController方法
    navigationController?.popViewController(animated: true)
}