---
title: "Discussion on \"Subclassing an open Swift class is not always possible\" | Hashnode"
description: "Discussion on \"Subclassing an open Swift class is not always possible\". An open class with internal designated and public convenience initializer? Understand Swift's access level, Class Inheritance and Initialization."
url: "https://hashnode.com/posts/subclassing-an-open-swift-class-is-not-always-possible/6344103629600542863d82b2"
---

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# [Subclassing an open Swift class is not always possible](https://blog.eidinger.info/subclassing-an-open-swift-class-is-not-always-possible?utm_source=hashnode&utm_medium=feed)

An open class with internal designated and public convenience initializer? Understand Swift's access level, Class Inheritance and Initialization.

Oct 10, 2022 · 4 min read · blog.eidinger.info  
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## Written by

[Marco Eidinger](https://hashnode.com/@MarcoEidinger)

@MarcoEidinger

  
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#Swift #iOS SDK architect 🇺🇸 🇩🇪

I am a Software Engineer working on open source and enterprise mobile SDKs for iOS and MacOS developers written in Swift. From 🇩🇪 and happily living in 🇺🇸

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