Chapter 1 - Prerequisites and languages used for iOS App development

iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc.

Requirements for iOS App development

1. MAC

Yes, it’s the basic requirement for iOS App development.
consider Mac Mini — it probably presents the best value for the money you will pay for it.
I would recommend at least 8GB RAM

2. Xcode

Xcode is Apple's programming application for developers. It's freely available from the Mac App Store. Xcode provides everything you need to kick start your app development. Most importantly, Xcode comes with an iPhone (or iPad) simulator so you can test your app even without the physical devices.

Languages used for iOS development

1. Objective C

2. Swift

• The latest programming language is Swift 4.1 developed by Apple Inc for iOS and OS X development.
• Swift provides modern programming features.
• Swift is friendly to new programmers.
• Swift comes with playground feature where programmers can write their code and execute it to see the results immediately.
• Swift is an alternative to the Objective-C language that employs modern programming-language theory concepts and strives to present a simpler syntax. During its introduction, it was described simply as "Objective-C without the C"