// 視圖加載時調(diào)用
    override func loadView() {
        super.loadView()
    }
    
    // 視圖加載完成時調(diào)用
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
    // 將要布局子視圖時調(diào)用
    override func viewWillLayoutSubviews() {
        super.viewWillLayoutSubviews()
    }
    
    // 已經(jīng)布局子視圖時調(diào)用
    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
    }
    
    // 界面將要展現(xiàn)時調(diào)用
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
    }
    
    // 界面已經(jīng)展現(xiàn)時調(diào)用
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
    }
    
    // 界面將要消失時調(diào)用
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
    }
    
    // 界面已經(jīng)消失時調(diào)用
    override func viewDidDisappear(_ animated: Bool) {
        super.viewDidDisappear(animated)
    }
    
    // 收到內(nèi)存警告時調(diào)用
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
    // 反初始化器（析構(gòu)方法）
    deinit {
        print("deinit")
    }