Workhop iOS 1: Fundamentos de Swift
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This document outlines the fundamentals of Swift 3 for iOS development, covering essential topics such as language basics, variables, functions, optionals, and control flow. It explains constructs like playgrounds for practical learning and provides detailed examples of variable types, function definitions, and control structures. The document is aimed at beginners and offers hands-on exercises to reinforce the concepts discussed.
![Variables
Arrays:
let emptyArray = [String]()
Dictionaries:
let emptyDictionary = [String: Float]()](https://image.slidesharecdn.com/swift3fundamentals-161114123912/85/Workhop-iOS-1-Fundamentos-de-Swift-17-320.jpg)
Workhop iOS 1: Fundamentos de Swift
- 1. Swift 3 Fundamentals iOS Workshops Alberto Irurueta - Pia Muñoz
- 2. Overview - Language Basics - Playgrounds - Variables - Functions - Optionals - Control Flow
- 4. Language Overview - No semicolons print(“Hello world!”) - Dot notation. No arrow operator (->). obj1.use(obj2 and: obj3) - C like comments (support for Javadoc like docs) // /* */
- 5. Basic Types - Int - Long - Float - Double - Character - String Others: - Uint8, Int8, Uint16, Int16, Uint32, Int32, Uint64, Int64
- 6. Basic operators - Operators are C like - Sum: a + b, a += b - Subtraction: a - b, a -= b - Product: a * b, a *= b - Division: a / b, a /= b - Modulus: a % b, a %= b - Booleans: a == b, a != b, a && b, a || b, !a - Bitwise: a & b, a | b, a ^ b, ~a, a << 1, a >> 1 - Ternary: a > b ? a : b - String concatenation: “hello” + “ world” - String interpolation: “a + b is (a+b)”
- 7. Playgrounds
- 8. Playgrounds - Is a simple way to learn and test pieces of code - Perfect for newbies and students - Available in: - Xcode - iPad as a standalone app https://developer.apple.com/videos/play/wwdc2016/408/
- 13. Variables
- 14. Variables Let (constants) vs. var (variables)
- 16. Variables Casting: var decimal: Double = 12.5 var integer: Int = Int(decimal) Inference: let typeInferredDouble = 3.14159 let actuallyDouble2: Double = 3 let actuallyDouble = Double(3) let actuallyDouble3 = 3 as Double
- 17. Variables Arrays: let emptyArray = [String]() Dictionaries: let emptyDictionary = [String: Float]()
- 18. Context Instances only live within their context { var a = 1 { var b = 2 print(“b is (b)”) } var b = 3 print(“b is (b)”) }
- 20. Functions
- 21. Functions Functions are types! Definition func name(_ param: Int) -> Int { ... } Type (Int) -> Int
- 22. Functions can have named parameters like objective C Definition func name(p param: Int) -> Int { ... } Type (p: Int) -> Int Functions
- 23. Functions Functions can be nested func func1() -> Void { print(“func1”) func func2(){ print(“func2”) } func2() }
- 24. Functions Sometimes you need to import import UIKit var a = max(1,2)
- 26. Optionals
- 27. Optionals Nil is not gone… var a: Int? var b: Int? = 3 var c: String? = nil var d: String = “hello” Providing default let a: String? = nil let b: String = “class” let c = “Hi (a ?? b)” let d = a!= nil ? a! : b let e = a??b
- 28. Unwrapping optionals Execution only when optional is defined var a: String? = “hello” if let b = a { //a is defined } Chained evaluation a?.someProperty?.someOtherProperty Forced unwrapping var b = a!.someProperty
- 30. Control Flow
- 32. switch switch variable { case “var1”: print(“variable is var1”) case “var2”: print(“variable is var2”) default: print(“variable is something else”) }
- 33. for-in for score in scores { //Being scores an array //And score each object in the array } for i in 0…<4 { //It enters 4 times //with values i = 0, 1, 2 and 3 }
- 34. while and repeat-while while n < b { n *= 2 } repeat { m *= 2 }while m < b