将所选行数据传递给next View Controller Swift 3

class SelectedData {
    var data: String
    
    init(data: String) {
        self.data = data
    }
}

let selectedData = SelectedData(data: "所选数据")

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "NextViewControllerSegue" {
        if let nextViewController = segue.destination as? NextViewController {
            nextViewController.selectedData = selectedData
        }
    }
}

class NextViewController: UIViewController {
    var selectedData: SelectedData?
    
    // 其他代码...
}