如何将这段 NSClassFromString 的代码转换为 Swift?

How to convert this code of NSClassFromString to Swift?

UIViewController *viewController = [[NSClassFromString(viewControllerName) alloc] init];

如何将 NSClassFromString 的代码转换为 swift

你可以这样写:

if let viewController = NSClassFromString(viewControllerName) as? UIViewController.Type {
   // Do something 
}