斯威夫特 - 指的是当前类类型的静态/类功能

Question

我已经静态函数实例化，看起来像

class AController: UIViewController { 
    static func instantiate() -> AController { 
    let storyboard = UIStoryboard(name: "AController", bundle: nil) 
    let controller = s.instantiateInitialViewController() as? AController 
    return controller! 
    } 
} 

class BController: UIViewController { 
    static func instantiate() -> BController { 
    let storyboard = UIStoryboard(name: "BController", bundle: nil) 
    let controller = storyboard.instantiateInitialViewController() as? BController 
    return controller! 
    } 
} 

视图控制器我，所以我想一群人，使这吸尘器：

class MYViewController: UIViewController { 
    class func instantiate() -> self.type { 
    let storyboard = UIStoryboard(name: "\(self.type)", bundle: nil) 
    let controller = storyboard.instantiateInitialViewController() as? self.type 
    return controller! 
    } 
} 

class AController: MYViewController { 
} 

class BController: MYViewController { 
} 

但我不知道的动态参考对象的类型在静态/类功能，以及如何有此指的是从子类的子类调用时。这很容易做到一旦对象已经被实例化type(of: object)

Answer 1

试试这个：

class MYViewController: UIViewController { 
    class func instantiate() -> Self { 
     let storyboard = UIStoryboard(name: "\(self)", bundle: nil) 
     let controller = storyboard.instantiateInitialViewController() as! Self 
     return controller 
    } 
} 

我不是100％肯定它的作品，因为我没有直接测试代码（不想创建只是用于测试的故事板），但我写了类似的代码进行测试，其工作原理：

class MYViewController: UIViewController { 
    class func instantiate() -> Self { 
     print("type: \(self)") 
     return self.init() 
    } 
}