swift4 重写init方法

class MainViewController: UIViewController {
    //只要重写init方法，就必须要实现的下面三个init方法，少一个都不行
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
    override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
        super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
    }
    init(_ argc : String) {
        self.init()
        self.name = argc
    }
    private var name:String!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        print("姓名:\(self.name!)")
    }
}