Reflection to Create Views in Swift

gistfile1.txt

struct LoginViewModel : ViewModel {
    
    var userName :String
    var password :String
}

class UIEngine<ViewModel> {
    
    var viewModel :ViewModel
    
    init(viewModel :ViewModel) {
        
        self.viewModel = viewModel
    }
    
    func build() -> UIView? {
        
        let view = UIView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
        view.backgroundColor = UIColor.lightGray
        
        var y = 40
        
        for property in Mirror(reflecting: self.viewModel).children {
            print(property.label!)
            
            if property.value is String {
                let tb = UITextField(frame: CGRect(x: 0, y: y, width: 200, height: 44))
                tb.backgroundColor = UIColor.darkGray
                tb.placeholder = "Enter \(property.label!)"

                view.addSubview(tb)
                
                y += 40
            }
            
        }
        
        return view
    }
    
}

let loginVM = LoginViewModel(userName: "", password: "")

let view = UIEngine<LoginViewModel>(viewModel: loginVM).build()

class LoginViewController : UIViewController {
    
    
    
}

let loginVC = LoginViewController()
loginVC.view.addSubview(view!)


PlaygroundPage.current.liveView = loginVC
PlaygroundPage.current.needsIndefiniteExecution = true