Steam Learn: Introduction to SWIFT
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The document introduces Swift, Apple's programming language for macOS and iOS development, emphasizing its user-friendly nature for beginners and basic programming concepts. It covers topics such as variables, optionals, functions, tuples, and control flow with examples, as well as the language's current limitations and the need for further documentation and migration. The future of Swift includes API updates and community engagement through social media.
Steam Learn: Introduction to SWIFT
- 1. 3rd of July 2014 SWIFT The Apple programming language by Romain Francez
- 2. 3rd of July 2014 What is SWIFT ? ● Apple programming language ● Released during WWDC ● Mac & iOS development
- 3. 3rd of July 2014 Anyone can code Simple An empty file is a program A one line file is a program println("Hello Steamhouse") Basic concepts are similar to other languages Everybody is starting at the same level Beginner
- 4. 3rd of July 2014 Anyone can code Less error prone var aText = "A string" // Type inference aText = 1.2 // Cannot convert the expression’s type to String var numberOverflow: UInt8 = UInt8.max + 1 // Arithmetic operation '255 + 1' (on type 'UInt8') results in an overflow var tenBillion = 10000000000 var tenBillionReadable = 10_000_000_000
- 5. 3rd of July 2014 But can they? Tricky concepts Optionals var anOptional: String? Inheritance class DataViewController: UIViewController, UITableViewDataSource, UITableViewDelegate Are there a class and two protocols or three protocols?
- 6. 3rd of July 2014 But can they? Adoption 1,200,000 apps on the iOS App Store It will take time to migrate Sparse documentation One official document Unfinished language No expert on the subject
- 7. 3rd of July 2014 Language
- 8. 3rd of July 2014 Basics Variables and constants let greetings = "Hello" // Constant var person = "World" // Variable person = "Steamhouse" // Can change the value of a variable greetings = "Goodbye" // Error, cannot change the value of a constant
- 9. 3rd of July 2014 Basics Optionals There is a value… or maybe not var anOptional: String? = nil // nil means no value var notAnOptional: String = nil // Error Accessing the value if anOptional { println(anOptional!) }
- 10. 3rd of July 2014 Basics Functions and closures func add(a: Int, b: Int) -> Int { return a + b } func adder(a: Int) -> (Int) -> Int { var _a = a func add(b: Int) -> Int { _a += b return _a } return add }
- 11. 3rd of July 2014 Basics Tuples let (latitude, longitude) = (48.85341, 2.3488) let paris = (48.85341, 2.3488) paris.0; paris.1 let parisExplicit = (latitude: 48.85341, longitude: 2.3488) parisExplicit.latitude; parisExplicit.longitude
- 12. 3rd of July 2014 Basics For-In for i in 0..10 { i } // 0 1 2 3 4 5 6 7 8 9 for i in 0...10 { i } // 0 1 2 3 4 5 6 7 8 9 10 for _ in 0..10 { println("Wake up") }
- 13. 3rd of July 2014 Basics Switch let point = (+24, -1_302) switch point { case (0..5, _): println("A bit on the right") case (5..100, _): println("Somewhat on the right") case (100...1_000_000, _): println("On the right") case (let x, _) where x > 1_000_000: println("Very far on the right") default: break } // Somewhat on the right
- 14. 3rd of July 2014 Demo
- 15. 3rd of July 2014 What the future holds The APIs are still old style They will migrate them in a near future
- 16. 3rd of July 2014 Questions ? For online questions, please leave a comment on the article.
- 17. 3rd of July 2014 Join the community ! (in Paris) Social networks : ● Follow us on Twitter : https://twitter.com/steamlearn ● Like us on Facebook : https://www.facebook.com/steamlearn SteamLearn is an Inovia initiative : inovia.fr You wish to be in the audience ? Contact us at learn@steamhouse.fr