Handle call class in storyboard easy

swift

import UIKit


extension UIViewController
{
    class func instantiateFromStoryboard(_ name: String = "Main") -> Self
    {
        return instantiateFromStoryboardHelper(name)
    }
    
    fileprivate class func instantiateFromStoryboardHelper<T>(_ name: String) -> T
    {
        let storyboard = UIStoryboard(name: name, bundle: nil)
        let controller = storyboard.instantiateViewController(withIdentifier: String(describing: self)) as! T
        return controller
    }
}

// UIView.
extension UIView {
    static var nib: UINib {
        
        return UINib(nibName: "\(self)", bundle: nil)
    }
    
    static func instantiateFromNib() -> Self? {
        
        func instanceFromNib<T: UIView>() ->T? {
            
            return nib.instantiate() as? T
        }
        
        return instanceFromNib()
    }
    
    @IBInspectable
    var cornerRadius: CGFloat {
        get {
            return layer.cornerRadius
        }
        set {
            layer.cornerRadius = newValue
        }
    }
    
    @IBInspectable
    var borderWidthV: CGFloat {
        get {
            return layer.borderWidth
        }
        set {
            layer.borderWidth = newValue
        }
    }
    
    @IBInspectable
    var borderColorV: UIColor? {
        get {
            if let color = layer.borderColor {
                return UIColor(cgColor: color)
            }
            return nil
        }
        set {
            if let color = newValue {
                layer.borderColor = color.cgColor
            } else {
                layer.borderColor = nil
            }
        }
    }
    
    @IBInspectable
    var shadowRadius: CGFloat {
        get {
            return layer.shadowRadius
        }
        set {
            layer.shadowRadius = newValue
        }
    }
    
    @IBInspectable
    var shadowOpacity: Float {
        get {
            return layer.shadowOpacity
        }
        set {
            layer.shadowOpacity = newValue
        }
    }
    
    @IBInspectable
    var shadowOffset: CGSize {
        get {
            return layer.shadowOffset
        }
        set {
            layer.shadowOffset = newValue
        }
    }
    
    @IBInspectable
    var shadowColor: UIColor? {
        get {
            if let color = layer.shadowColor {
                return UIColor(cgColor: color)
            }
            return nil
        }
        set {
            if let color = newValue {
                layer.shadowColor = color.cgColor
            } else {
                layer.shadowColor = nil
            }
        }
    }
}

protocol ReusableView: class {
    static var defaultReuseIdentifier: String { get }
    static var nibName: String { get }
}

extension ReusableView where Self: UIView {
    static var defaultReuseIdentifier: String {
        // Get the real name of the class for default value
        return String(describing: self)
    }
    static var nibName: String {
        return NSStringFromClass(self).components(separatedBy: ".").last ?? ""
    }
}

// UINib
extension UINib {
    
    func instantiate() -> Any? {
        
        return self.instantiate(withOwner: nil, options: nil).first
    }
}

// UITableView
extension UITableView {
    // Register the Cell from XIB with identifer
    func register<T: UITableViewCell>(nibName name: T.Type, atBundle bundleClass: AnyClass? = nil) where T: ReusableView {
        let identifier = T.defaultReuseIdentifier
        let nibName = T.nibName
        
        var bundle: Bundle? = nil
        if let bundleName = bundleClass {
            bundle = Bundle(for: bundleName)
        }
        register(UINib(nibName: nibName, bundle: bundle), forCellReuseIdentifier: identifier)
    }
    
    // DequeueReusableCell with identifier
    func dequeueReusableCell<T: UITableViewCell>(_ type: T.Type) -> T where T: ReusableView {
        guard let cell =  self.dequeueReusableCell(withIdentifier: T.defaultReuseIdentifier) as? T else {
            fatalError("Could not dequeue cell with identifier: \(T.defaultReuseIdentifier)")
        }
        return cell
    }
}