//var s: String?
//s = nil
let name: String? = "yamada"
let msg = "hello " + name!
if name != nil {
let msg = "hello " + name!
}
if let s = name {
let msg = "hello " + s
}
var label: String!
label = "score"
println(label)
function
//func sayHi(){
// println("hi")
//}
//sayHi()
func sayHi(name: String){
println("hi " + name)
}
sayHi("satoshi")
func sayHi(myname name: String){
println("hi " + name)
}
sayHi(myname: "satoshi")
func sayHi(#name: String = "jiro"){
println("hi " + name)
}
sayHi(name: "satoshi")
列挙型
enum Result {
case Success
case Error
func getMessage() -> String {
switch self {
case .Success:
return "OK"
case .Error:
return "OK"
}
}
}
var r: Result
r = Result.Success
r = .Success
Result.Error.rawValue
class
class User {
var name: String
var score: Int = 0
init(name: String){
self.name = name
}
func updrade() {
score++
}
}
var tom = User(name: "Tom")
tom.name
tom.score
tom.updrade()
tom.score
継承
class User {
var name: String
var score: Int = 0
init(name: String){
self.name = name
}
final func upgrade() {
score++
}
}
class AdminUser: User {
func reset(){
score = 0
}
override func upgrade(){
score += 3
}
}
protocol
protocol Student {
var studentId: String { get set }
func study()
}
class User: Student {
var name: String
var score: Int = 0
var studentId: String = "hoge"
func study(){
println("studying.....")
}
init(name: String){
self.name = name
}
func upgrade() {
score++
}
}
var tom = User(name: "Tom")
tom.name
tom.score
tom.upgrade()
tom.score
willSet, didSet
class User {
var name: String
var score: Int = 0 {
willSet{
println("\(score) -> \(newValue)")
}
didSet {
println("\(oldValue) -> \(score)")
}
}
var level: Int {
get{
return Int(score / 10)
}
set {
score = Int(newValue * 10)
}
}
init(name: String){
self.name = name
}
func upgrade() {
score++
}
}
optional chaining
class User {
var blog: Blog?
}
class Blog {
var title = "My Blog"
}
var tom = User()
tom.blog = Blog()
tom.blog?.title
if let t = tom.blog?.title {
println(t)
}
type casting
class User {
var name: String
init(name: String){
self.name = name
}
}
class AdminUser: User {}
let tom = User(name: "Tom")
let bob = AdminUser(name: "Bob")
let steve = someUser()
let users: [AnyObject] = [tom, bob, steve]
for user in users {
if let u = user as? AdminUser {
println(u.name)
構造体
struct UserStruct {
var name: String
var score: Int = 0
init(name: String){
self.name = name
}
mutating func upgrade(){
score++
}
}
拡張
extension String {
var size: Int {
return countElements(self)
}
func dummy() -> String {
return "dummy"
}
}
var s: String = "hoge"
s.size
s.dummy()
generics
func getArray(item: T, count: Int) -> [T] { var result = [T]() for _ in 0..
