---
title: Using Imported Protocol-Qualified Classes in Swift
framework: swift
role: article
role_heading: Article
path: swift/using-imported-protocol-qualified-classes-in-swift
---

# Using Imported Protocol-Qualified Classes in Swift

Learn how imported Objective-C protocol-qualified classes and metaclasses are represented.

## Overview

Overview Objective-C classes qualified by one or more protocols, like the one in the example below, are imported by Swift as protocol composition types. The following Objective-C property refers to a view controller that also acts a data source and delegate: @property UIViewController<UITableViewDataSource, UITableViewDelegate> * myController; When you import it, here’s the Swift interface: var myController: UIViewController & UITableViewDataSource & UITableViewDelegate An Objective-C protocol-qualified metaclass is imported by Swift as a protocol metatype, which is a type that represents the type of a protocol itself. For example, given the following Objective-C method that performs an operation on the specified class: - (void)doSomethingForClass:(Class<NSCoding>)codingClass; When you import it, here’s the Swift interface: func doSomething(for codingClass: NSCoding.Type)

## See Also

### Objective-C APIs

- [Using Imported Lightweight Generics in Swift](swift/using-imported-lightweight-generics-in-swift.md)