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ϝϞϦʔཧͷඒຯ͍͠
όΠΩϯάྉཧ
Ray Fix
@rayfix
ը૾ఏڙ Yumi Kimura (CC2)
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Ray Fix୭ʁ
Source: https://en.wikipedia.org/wiki/La_Jolla
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RayWenderlich.com
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iosdc.jp Ray Fix
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iosdc.jp Ray Fix
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iosdc.jp Ray Fix
ϝϞϦʔཧ
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iosdc.jp Ray Fix
ελοΫvsώʔϓྖҬ
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iosdc.jp Ray Fix
ελοΫ
ελοΫͱʹ͔͍͘ʂ
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iosdc.jp Ray Fix
ελοΫ
ελοΫͱʹ͔͍͘ʂ
func candy() {
let ramune = 10
let pocky = 12
let gummi = 20
}
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iosdc.jp Ray Fix
ελοΫ
ελοΫͱʹ͔͍͘ʂ
func candy() {
let ramune = 10
let pocky = 12
let gummi = 20
}
ελοΫ
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iosdc.jp Ray Fix
ελοΫ
ελοΫͱʹ͔͍͘ʂ
func candy() {
let ramune = 10
let pocky = 12
let gummi = 20
}
ελοΫ
10
12
20
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iosdc.jp Ray Fix
ελοΫ
ελοΫͱʹ͔͍͘ʂ
func candy() {
let ramune = 10
let pocky = 12
let gummi = 20
}
ελοΫ
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iosdc.jp Ray Fix
ελοΫ
ελοΫͱʹ͔͍͘ʂ
func candy() {
let ramune = 10
let pocky = 12
let gummi = 20
}
ελοΫ
ϩοΫ͢Δඞཁશ͘ͳ͍
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iosdc.jp Ray Fix
ώʔϓྖҬ
class Dishɹ{
var name: String
init(name: String) {
self.name = name
print(" Dish \(name)")
}
deinit {
print("☠ Dish \(name)")
}
}
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iosdc.jp Ray Fix
ώʔϓྖҬ
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iosdc.jp Ray Fix
ώʔϓྖҬ
let softCream = Dish(name: “Soft Cream")
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iosdc.jp Ray Fix
ώʔϓྖҬ
let softCream = Dish(name: “Soft Cream")
Count: 1
“Soft Cream”
ώʔϓ
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iosdc.jp Ray Fix
ώʔϓྖҬ
let softCream = Dish(name: “Soft Cream")
Count: 1
“Soft Cream”
ώʔϓ
softCream
ελοΫ
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iosdc.jp Ray Fix
ώʔϓྖҬ
let softCream = Dish(name: “Soft Cream")
Count: 1
“Soft Cream”
softCream
ώʔϓ
ελοΫ
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iosdc.jp Ray Fix
ώʔϓྖҬ
let softCream = Dish(name: “Soft Cream")
let special = softCream
Count: 1
“Soft Cream”
softCream
ώʔϓ
ελοΫ
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iosdc.jp Ray Fix
ώʔϓྖҬ
let softCream = Dish(name: “Soft Cream")
let special = softCream
Count: 1
“Soft Cream”
softCream
ώʔϓ
ελοΫ
Count: 2
“Soft Cream”
special
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iosdc.jp Ray Fix
ڞ༗
softCream.name = "Choco Soft Cream"
special.name // "Choco Soft Cream"
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iosdc.jp Ray Fix
ڞ༗
softCream.name = "Choco Soft Cream"
special.name // "Choco Soft Cream"
ϫΦɺศརʂʂʂ
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iosdc.jp Ray Fix
ڞ༗
softCream.name = "Choco Soft Cream"
special.name // "Choco Soft Cream"
ϫΦɺศརʂʂʂ
͔͠͠
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iosdc.jp Ray Fix
ڞ༗
softCream.name = "Choco Soft Cream"
special.name // "Choco Soft Cream"
ϫΦɺศརʂʂʂ
͔͠͠
special.name = "ϐʔϚϯ"
softCream.name // "ϐʔϚϯ"
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iosdc.jp Ray Fix
ڞ༗
softCream.name = "Choco Soft Cream"
special.name // "Choco Soft Cream"
ϫΦɺศརʂʂʂ
͔͠͠
special.name = "ϐʔϚϯ"
softCream.name // "ϐʔϚϯ"
ఆ֎ͷڞ༗ࢀরܕͷܽ
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iosdc.jp Ray Fix
ղܾ๏:ఆΛ͏
class Dishɹ{
init(name: String) {
self.name = name
print(" Dish \(name)")
}
deinit {
print("☠ Dish \(name)")
}
}
var name: String
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iosdc.jp Ray Fix
ղܾ๏:ఆΛ͏
class Dishɹ{
init(name: String) {
self.name = name
print(" Dish \(name)")
}
deinit {
print("☠ Dish \(name)")
}
}
var name: String
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iosdc.jp Ray Fix
ղܾ๏:ఆΛ͏
class Dishɹ{
init(name: String) {
self.name = name
print(" Dish \(name)")
}
deinit {
print("☠ Dish \(name)")
}
}
let name: String
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iosdc.jp Ray Fix
ղܾ๏:ఆΛ͏
class Dishɹ{
init(name: String) {
self.name = name
print(" Dish \(name)")
}
deinit {
print("☠ Dish \(name)")
}
}
let name: String
special.name = "ϐʔϚϯ"
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iosdc.jp Ray Fix
ώʔϓྖҬ
let softCream = Dish(name: “Soft Cream")
let special = softCream
Count: 0
“Soft Cream”
ώʔϓ
ελοΫ
Count: 2
“Soft Cream”
softCream
special
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iosdc.jp Ray Fix
ώʔϓྖҬ
let softCream = Dish(name: “Soft Cream")
let special = softCream
Count: 0
“Soft Cream”
ώʔϓ
ελοΫ
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iosdc.jp Ray Fix
ώʔϓྖҬ
let softCream = Dish(name: “Soft Cream")
let special = softCream
ώʔϓ
ελοΫ
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iosdc.jp Ray Fix
Customer
orders
ɿ॥ࢀর
Order
customer
dish
Dish
name
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iosdc.jp Ray Fix
ࢀরαΠΫϧ
class Customer {
var orders: [Order]
func add(order: Order) {
order.customer = self
orders.append(order)
}
}
class Order {
var customer: Customer?
let dish: Dish
}
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iosdc.jp Ray Fix
ࢀরαΠΫϧ
class Customer {
var orders: [Order]
func add(order: Order) {
order.customer = self
orders.append(order)
}
}
class Order {
var customer: Customer?
let dish: Dish
}
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iosdc.jp Ray Fix
ࢀরαΠΫϧ
let ray = Customer(name: "Ray")
let saikoro = Dish(name: “Saikoro Steak")
let order = Order(dish: saikoro)
ray.add(order: order)
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iosdc.jp Ray Fix
ࢀরαΠΫϧ
let ray = Customer(name: "Ray")
let saikoro = Dish(name: “Saikoro Steak")
let order = Order(dish: saikoro)
ray.add(order: order)
ray saikoro
order
orders
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iosdc.jp Ray Fix
ࢀরαΠΫϧ
let ray = Customer(name: "Ray")
let saikoro = Dish(name: “Saikoro Steak")
let order = Order(dish: saikoro)
ray.add(order: order)
ray saikoro
order
orders
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iosdc.jp Ray Fix
Xcode 8 Memory Visualizer
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iosdc.jp Ray Fix
Xcode 8 Memory Visualizer
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iosdc.jp Ray Fix
Xcode 8 Memory Visualizer
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iosdc.jp Ray Fix
Xcode 8 Memory Visualizer
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iosdc.jp Ray Fix
Xcode 8 Memory Visualizer
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iosdc.jp Ray Fix
Customer
orders
॥ࢀর
Order
customer
dish
Dish
name
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iosdc.jp Ray Fix
॥ࢀর
class Customer {
var orders: [Order]
func add(order: Order) {
order.customer = self
orders.append(order)
}
}
class Order {
let dish: Dish
}
var customer: Customer?
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iosdc.jp Ray Fix
॥ࢀর
class Customer {
var orders: [Order]
func add(order: Order) {
order.customer = self
orders.append(order)
}
}
class Order {
let dish: Dish
}
var customer: Customer?
weak
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iosdc.jp Ray Fix
॥ࢀর
class Customer {
var orders: [Order]
func add(order: Order) {
order.customer = self
orders.append(order)
}
}
class Order {
let dish: Dish
}
var customer: Customer?
weak
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iosdc.jp Ray Fix
॥ࢀর
let ray = Customer(name: "Ray")
let saikoro = Dish(name: "Saikoro")
let order = Order(dish: saikoro)
ray.add(order: order)
ray saikoro
order
orders
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iosdc.jp Ray Fix
॥ࢀর
let ray = Customer(name: "Ray")
let saikoro = Dish(name: "Saikoro")
let order = Order(dish: saikoro)
ray.add(order: order)
ray saikoro
order
orders
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iosdc.jp Ray Fix
॥ࢀর
let ray = Customer(name: "Ray")
let saikoro = Dish(name: "Saikoro")
let order = Order(dish: saikoro)
ray.add(order: order)
saikoro
order
nil
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iosdc.jp Ray Fix
॥ࢀর
let ray = Customer(name: "Ray")
let saikoro = Dish(name: "Saikoro")
let order = Order(dish: saikoro)
ray.add(order: order)
saikoro
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iosdc.jp Ray Fix
॥ࢀর
let ray = Customer(name: "Ray")
let saikoro = Dish(name: "Saikoro")
let order = Order(dish: saikoro)
ray.add(order: order)
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iosdc.jp Ray Fix
weak
ࢀর̍
ࢀর̎
ࢀর̏
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iosdc.jp Ray Fix
weak
ࢀর̍
ࢀর̎
ࢀর̏
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iosdc.jp Ray Fix
weak
ࢀর̍
ࢀর̎
ࢀর̏
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iosdc.jp Ray Fix
weak
nil
nil
nil
ࢀর̍
ࢀর̎
ࢀর̏
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iosdc.jp Ray Fix
weak
nil
nil
nil
ࢀর̍
ࢀর̎
ࢀর̏
reference value
ࢀর̍ nil
ࢀর̎ nil
ࢀর̏ nil
άϩʔόϧςʔϒϧ
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iosdc.jp Ray Fix
Swift weak
1 3
ࢀর̎
ࢀর̏
ࢀর̍
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iosdc.jp Ray Fix
Swift weak
1 3
ࢀর̎
ࢀর̏
ࢀর̍
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iosdc.jp Ray Fix
Swift weak
1 3
0 κϯϏ 3
ࢀর̎
ࢀর̏
ࢀর̍
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ڧ͍ࢀরΧϯτ͕̌ʹ
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ڧ͍ࢀরΧϯτ͕̌ʹ
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ऑ͍ࢀরΧϯτ͕̌ʹ
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ऑ͍ࢀরΧϯτ͕̌ʹ
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unowned
• unowned ผͷछྨͷऑ͍ࢀর
• ࢀরઌ͕ඞͣ͋Δ͜ͱ͕લఏ
• ͠ࢀরઌ͕ͳ͍ͱɺϓϩάϥϜ͕ఀࢭ͢Δ
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unowned
class Order {
let dish: Dish
}
class Customer {
var orders: [Order]
func add(dish: Dish) {
let order = Order(dish: dish, customer: self)
orders.append(order)
}
}
let customer: Customer
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unowned
class Order {
let dish: Dish
}
class Customer {
var orders: [Order]
func add(dish: Dish) {
let order = Order(dish: dish, customer: self)
orders.append(order)
}
}
let customer: Customer
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unowned
class Order {
let dish: Dish
}
class Customer {
var orders: [Order]
func add(dish: Dish) {
let order = Order(dish: dish, customer: self)
orders.append(order)
}
}
let customer: Customer
unowned
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unowned
class Order {
let dish: Dish
}
class Customer {
var orders: [Order]
func add(dish: Dish) {
let order = Order(dish: dish, customer: self)
orders.append(order)
}
}
let customer: Customer
unowned
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iosdc.jp Ray Fix
unowned
1 3
0 κϯϏ 3
ࢀর̎
ࢀর̏
ࢀর̍
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iosdc.jp Ray Fix
unowned
1 3
0 κϯϏ 3
ࢀর̎
ࢀর̏
ࢀর̍
ϓϩάϥϜ͕ఀࢭ
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ؔͱΫϩʔδϟࢀরܕ
{ }
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ؔͱΫϩʔδϟࢀরܕ
{ }
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ྫɿण࢘
enum MenuItem: String {
case toro, ebi, anago, uni, ikura, hamachi
}
typealias Action = ()->()
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ྫɿ ण࢘
class Sushiya {
lazy var menu: [MenuItem: Action] = […]
func prepare(_ menuItem: MenuItem) {
menu[menuItem]?()
}
private func serve(dish: Dish) {
print("Now serving \(dish.name)")
}
}
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ྫɿ ण࢘
menu =
[
.toro: {
let dish = Dish(name: "Toro")
},
…
]
serve(dish: dish)
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ྫɿ ण࢘
menu =
[
.toro: {
let dish = Dish(name: "Toro")
},
…
]
serve(dish: dish)
self.
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ྫɿ ण࢘
menu =
[
.toro: {
let dish = Dish(name: "Toro")
},
…
]
serve(dish: dish)
self.
let sushiya = Sushiya()
sushiya.prepare(.toro)
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ϝϞϦʔ࿙Ε
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ղܾ๏ɿ ΩϟϓνϟʔϦετ
var value = 0
let showValue = {
print(value)
}
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ղܾ๏ɿ ΩϟϓνϟʔϦετ
var value = 0
let showValue = {
print(value)
}
showValue() // prints 0
value = 10
showValue() // prints 10
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ղܾ๏ɿ ΩϟϓνϟʔϦετ
var value = 0
let showValue = {
print(value)
}
showValue() // prints 0
value = 10
showValue() // prints 10
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ղܾ๏ɿ ΩϟϓνϟʔϦετ
var value = 0
let showValue = {
print(value)
}
showValue() // prints 0
value = 10
showValue() // prints
[value] in
10
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ղܾ๏ɿ ΩϟϓνϟʔϦετ
var value = 0
let showValue = {
print(value)
}
showValue() // prints 0
value = 10
showValue() // prints
[value] in
0
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ղܾ๏ɿ ΩϟϓνϟʔϦετ
menu =
[
.toro: {
let dish = Dish(name: "Toro")
self.serve(dish: dish)
},
…
]
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ղܾ๏ɿ ΩϟϓνϟʔϦετ
menu =
[
.toro: {
let dish = Dish(name: "Toro")
self.serve(dish: dish)
},
…
]
[unowned self] in
#
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ඇಉظͷ
private func serve(dish: Dish) {
print("Now serving \(dish.name)")
}
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ඇಉظͷ
private func serve(dish: Dish) {
DispatchQueue.main.async {
print("Now serving \(dish.name)")
self.served += 1
}
}
private func serve(dish: Dish) {
print("Now serving \(dish.name)")
}
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ඇಉظͷ
[unowned self] in
private func serve(dish: Dish) {
DispatchQueue.main.async {
print("Now serving \(dish.name)")
self.served += 1
}
}
private func serve(dish: Dish) {
print("Now serving \(dish.name)")
}
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ඇಉظͷ
[unowned self] in
private func serve(dish: Dish) {
DispatchQueue.main.async {
print("Now serving \(dish.name)")
self.served += 1
}
}
private func serve(dish: Dish) {
print("Now serving \(dish.name)")
} CRASH!!!!
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ඇಉظͷ
private func serve(dish: Dish) {
DispatchQueue.main.async {
print("Now serving \(dish.name)")
self.served += 1
}
}
private func serve(dish: Dish) {
print("Now serving \(dish.name)")
}
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weak
private func serve(dish: Dish) {
DispatchQueue.main.async { [weak self] in
print("Now serving \(dish.name)")
self?.served += 1
}
}
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strong weak μϯε
private func serve(dish: Dish) {
DispatchQueue.main.async { [weak self] in
guard let strongSelf = self else {
print("Cancelled \(dish.name)")
return
}
print("Now serving \(dish.name)")
strongSelf.served += 1
}
}
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ඒຯ͍͠SWIFTΛॻ͘ʹ
ϝϞϦʔͱͷ૬ੑΛ
Ѳ͢Δඞཁ͕͋Δ
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͝ਗ਼ௌ͋Γ͕ͱ͏
͍͟͝·ͨ͠
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https://www.youtube.com/watch?v=0-vWT-t0UHg
ԣϦφοΫεಡॻձ̒̓ɿmalloc
https://www.mikeash.com/pyblog/friday-qa-2015-12-11-swift-weak-references.html
SWIFT ऑ͍ࢀরͷৄ͍͠
http://bit.ly/etystamp
༑ୡͷ LINE ελϜϓʂ
https://en.wikipedia.org/wiki/La_Jolla
ೆΧϦϑΥϧχΞͷࣸਅ
https://ja.wikipedia.org/wiki/ण࢘
ण࢘ͷࣸਅ
http://echo-labs.com/
ECHO LABS ݦඍڸ
http://raywenderlich.com/
Ray Wenderlich ϝϞϦʔνϡʔτ (Maxime Defauwஶऀ) 9݄ެ։༧ఆ
ࢀߟϦϯΫ
https://github.com/rayfix/MemoryDish
ιʔείʔυɺεϥΠυ
wwdc2016/416/
WWDC Swift Performance
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https://www.youtube.com/watch?v=0-vWT-t0UHg
ԣϦφοΫεಡॻձ̒̓ɿmalloc
https://www.mikeash.com/pyblog/friday-qa-2015-12-11-swift-weak-references.html
SWIFT ऑ͍ࢀরͷৄ͍͠
http://bit.ly/etystamp
༑ୡͷ LINE ελϜϓʂ
https://en.wikipedia.org/wiki/La_Jolla
ೆΧϦϑΥϧχΞͷࣸਅ
https://ja.wikipedia.org/wiki/ण࢘
ण࢘ͷࣸਅ
http://echo-labs.com/
ECHO LABS ݦඍڸ
http://raywenderlich.com/
Ray Wenderlich ϝϞϦʔνϡʔτ (Maxime Defauwஶऀ) 9݄ެ։༧ఆ
ࢀߟϦϯΫ
https://github.com/rayfix/MemoryDish
ιʔείʔυɺεϥΠυ
wwdc2016/416/
WWDC Swift Performance