SearchParentView.swift

import UIKit

func recurisiveSearchParentViewUntil<T: UIView>(type: T.Type, currentView: UIView) -> T? {
    switch currentView {
    case let view as T:
        return view // 当前 view 满足则返回 view
    case let view where view.superview != nil:
        return recurisiveSearchParentViewUntil(type, currentView: view.superview!)
    default:
        return nil
    }
}

func recurisiveSearchParentViewUntil<T: UIView>(type: T.Type, currentView: UIView?) -> T? {
    guard let currentView = currentView else { return nil }
    return (currentView as? T) ?? recurisiveSearchParentViewUntil(type, currentView: currentView.superview)
}