Apple Swift New Programming Language for Mac & iOS Sen Ma - - PowerPoint PPT Presentation

Apple Swift

New Programming Language for Mac & iOS Sen Ma

Function patterns Concise syntax Native collections Operator overloading Namespaces Tuples Closures Protocols and extensions on structs Generics Clear mutability syntax Interactive playground Compile to native code Read-Eval-Print-Loop (REPL) Object orientation Type inference Optional Types Fast iteration Pattern matching Multiple return types

Fast Modern Safe Interactive

println("Hello World!") #include <iostream> using namespace std;

• int main()

{ cout << "Hello World!" << endl; return 0; } "Hello World!"

goto pointers type casting uninitialized variables unsafe string formatting unclear copy / reference rules

Variables

var name: type = "value" var version: Double = 1.0 var year: Int = 2014 var LanguageName: String = "Swift"

Constant variables

let name: type = "value" let version: Double = 1.0 let year: Int = 2014 let LanguageName: String = "Swift"

Constant variables

let name: type = "value" let version: Double = 1.0 let year: Int = 2014 let LanguageName: String = "Swift"

let name = "value" let version = 1.0 let year = 2014 let LanguageName = "Swift"

Constant variables

let name = "value" // Inference Type let version = 1.0 // Double let year = 2014 // Int let LanguageName = "Swift" // String let π = 3.1415926 // Double let 🐷 = "dog" // String

Constant variables

println

let a=3, b=5
 Output:


println

let a=3, b=5
 println(a)
 println(b) Output:


println

let a=3, b=5
 println(a)
 println(b) Output:
 3
 5

println

let a=3, b=5
 println(a)
 println(b) Output:
 3
 5
 3 times 5 is 8

println

let a=3, b=5
 println(a)
 println(b)
 println("\(a) times \(b) is \(a*b)") Output:
 3
 5
 3 times 5 is 8

Demo

Loops

for (var i=0; i<10; i++){ }

var i=0; while (i<10){ println(i) i++; }

Loops - for in

for ch in "mouse"{ println(ch) } Output:
 m


u
 s
 e

Loops - for in

for ch in "⿏鼡标"{ println(ch) } Output:
 ⿏鼡
 标

Loops - for in

for ch in "🐮🐮🐮🐮🐮"{ println(ch) } Output:
 🐮
 🐮
 🐮
 🐮
 🐮

Loops - for in - Range

for num in 1…5{ println(num) } Output:
 1
 2
 3
 4
 5

Loops - for in - Range

for num in 0..<5{ println(num) } Output:
 0
 1
 2
 3
 4

Demo

Array

let array = [1, 2, 3, 4, 5]
 Output:


Array

let array = [1, 2, 3, 4, 5]
 println(array)
 Output:
 


Array

let array = [1, 2, 3, 4, 5]
 println(array)
 Output:
 [1,2,3,4,5]


Array

let array = [1, 2, 3, 4, 5]
 println(array)
 println(array[1]) Output:
 [1,2,3,4,5]


Array

let array = [1, 2, 3, 4, 5]
 println(array)
 println(array[1]) Output:
 [1,2,3,4,5]
 2

Array

let array = [1, 2, 3, 4, 5]
 for num in array{
 println(num)
 } Output:
 1
 2
 3
 4
 5

Function

func SayHello(){
 println("Hello")
 }
 
 SayHello() Output:


Function

func SayHello(){
 println("Hello")
 }
 
 SayHello() Output:
 Hello

Function

func SayHello(name: String){
 println("Hello \(name)")
 }
 
 SayHello("Sen Ma") Output:
 Hello

Function

func SayHello(name: String){
 println("Hello \(name)")
 }
 
 SayHello("Sen Ma") Output:
 Hello Sen Ma

Function

func SayHello(name: String)->String{
 return "Hello " + name
 }
 
 SayHello("Sen Ma") Output:
 Hello Sen Ma

Demo