Swift 3 - 使用未解析的標識符'Static'

Question

我正在關注this example以在我的iOS應用程序中實施清潔架構。

class CreateOrderConfigurator 
{ 
    private static var __once:() = { 
     //ERROR - use of unresolved identifier 'Static' 
     Static.instance = CreateOrderConfigurator() 
    }() 


    // MARK: Object lifecycle 

    class var sharedInstance: CreateOrderConfigurator 
    { 
    struct Static { 
     static var instance: CreateOrderConfigurator? 
     static var token: Int = 0 
    } 

    _ = CreateOrderConfigurator.__once 

    return Static.instance! 
    } 

    // MARK: Configuration 

    func configure(_ viewController: CreateOrderViewController) 
    { 
    let router = CreateOrderRouter() 
    router.viewController = viewController 

    let presenter = CreateOrderPresenter() 
    presenter.output = viewController 

    let interactor = CreateOrderInteractor() 
    interactor.output = presenter 

    viewController.output = interactor 
    viewController.router = router 
    } 
} 

我收到一個錯誤，說use of unresolved identifier 'Static'。我該如何解決這個問題？

PS：我是新來的iOS和斯威夫特3.

Answer 1

單身是斯威夫特很簡單

更換

private static var __once:() = { 
     //ERROR - use of unresolved identifier 'Static' 
     Static.instance = CreateOrderConfigurator() 
    }() 


    // MARK: Object lifecycle 

    class var sharedInstance: CreateOrderConfigurator 
    { 
    struct Static { 
     static var instance: CreateOrderConfigurator? 
     static var token: Int = 0 
    } 

    _ = CreateOrderConfigurator.__once 

    return Static.instance! 
    } 

與

static let sharedInstance = CreateOrderConfigurator()