Useful UIView extensions

UIView+Useful.swift

extension UIView {
    
    /**
     Searches for superview with specified type in view hierarchy
     
         let cell = button.superviewOfType(UITableViewCell.self)
     
     - Parameter type: Type of superview
     - Returns: A superview of specified type
     
     */
    func superviewOfType<T>(type: T.Type) -> T? {
        var currentView = self
        while let superview = currentView.superview {
            if superview is T {
                return superview as? T
            }
            
            currentView = superview
        }
        
        return nil
    }
    
}