StoryboardやXib読み込み用ヘルパー関数

使い方

• Storyboard

class MyViewController: UIViewController {
    var myProp: Int = 0
}

extension MyViewController: Storyboardable {
    
    class var storyboardIdentifier: String { return "MyViewController" }
    class var storyboardName: String { return "MyStoryboard" }

}


let vc = from_storyboard(MyViewController.self)
vc.myProp = 1

• Xib

class MyView: UIView {
    var myProp: Int = 0
}

extension MyView: Xibable {
    class var xibName: String { return "MyView" }
}


let view = from_xib(MyView.self)
view.myProp = 1

実装

protocol Storyboardable {
    
    static var storyboardIdentifier: String { get }
    static var storyboardName: String { get }
}

func from_storyboard<T: AnyObject where T: Storyboardable>(clazz: T.Type) -> T! {
    
    let identifier = T.storyboardIdentifier
    let name = T.storyboardName
    
    let storyboard = UIStoryboard(name: name, bundle: nil)
    return storyboard.instantiateViewControllerWithIdentifier(identifier) as? T
}

protocol Xibable {
    
    static var xibName: String { get }
}

func from_xib<T: AnyObject where T: Xibable>(clazz: T.Type, owner: AnyObject? = nil, options: [NSObject: AnyObject]? = nil, atIndex index: Int = 0) -> T! {
    
    let name = T.xibName

    let xib = UINib(nibName: name, bundle: nil)
    return xib.instantiateWithOwner(owner, options: options)[index] as? T
}