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Ϋϩʔδϟʹ͍ͭͯ
ୈ6ճɹΧδϡΞϧSwiftษڧձ@੨༿
2016/04/02()
ZuQ9Nn
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ࣗݾհ
ZuQ9Nn(͖ͣΎʙΜ)
ීஈObjective-CͰiOSΞϓϦ։ൃ(ձࣾһͰ͢)
࣮ͰSwiftΛͬͨ͜ͱແ͍Αɻ
ݸਓͰΞϓϦग़ͯ͠·͢ɻ(࠷ۙఀ)
ؾʹͳΔਓAppStoreͰZuQ9NnΛݕࡧʂ
μϯϩʔυͯ͠ϨϏϡʔΛ
ೖΕͯΒ͑ΔͱྭΈʹͳΓ·͢
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͡Ίʹ
͕ࣗΫϩʔδϟ͕ۤखͳͷͰ
ൃද͢Δ͜ͱͰษڧ͠Α͏͔ͳ͊ͱɻɻ
͋·Γɺਂ͍༰͋Γ·ͤΜɻ
͢Ͱʹ͍ͬͯΔํɺৄ͍͠ํʹΓͳ͍͔ɻ
ϚαΧϦ͍͍͛ͯͨͩͯ
ൃදͦͷʹ׳Εͯ·ͤΜͷͰ
ରԠ͔͠ͶΔ͔ͱ͓͍·͢ͷͰ͓खॊΒ͔ʹɻ
ͱಉ͡Α͏ʹΫϩʔδϟ͕ۤखͳਓ͕গ͠Ͱ
ॿ͚ʹͳΕྑ͍͔ͳ͊ɻ
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What is Ϋϩʔδϟʁ
Ϋϩʔδϟͱ
ແ໊ؔʂ
ͭ·Γ໊લͷͳ͍ؔͰ͢ɻ
ͱ͍ͬͯɺ͍͖ͳΓΫϩʔδϟΛॻ͖࢝ΊΔͷ͍͠ͱ
ݸਓతʹײ͍ͯ͡·͢ɻ
ͦ͜Ͱɺ·ͣɺී௨ͷ໊લͷ͋ΔؔΛΫϩʔδϟʹ͍ͯ͘͠
εςοϓΛ;Ή͜ͱͰΫϩʔδϟΛॻ͘͜ͱʹ
׳Ε͍͖ͯ·͠ΐ͏ʂʂ
ྫ͠ࢉΛ͢Δؔ
func add(x: Int, y: Int) -> Int {
return x + y
}
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εςοϓ̍
໊લͷແ͍ؔͬͯݴ͏͘Β͍ͳͷͰɺ໊ؔΛআʂ
func add(x: Int, y: Int) -> Int {
return x + y
}
func add(x: Int, y: Int) -> Int {
return x + y
}
(x: Int, y: Int) -> Int {
return x + y
}
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εςοϓ2
ؔͷ໊લΛআ͢Δͱจষͷ࢝·Γ͕Θ͔Βͳ͘ͳΔɻ
ifจswitchจΛݟͯΘ͔ΔΑ͏ʹSwiftͰͷจষ
தׅހɹ{} ͰғΉͷͰதׅހͷ࢝·ΓΛҠಈ
(x: Int, y: Int) -> Int {
return x + y
}
{ (x: Int, y: Int) -> Int
return x + y
}
{ (x: Int, y: Int) -> Int {
return x + y
}
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εςοϓ3
தׅހͷ࢝·ΓΛҠಈ͢Δͱࠓɺ
ؔͷએݴͷ෦ͱ࣮ͷ෦ͷڥ͕Θ͔Βͳ͘ͳΔͷͰɺ
ͦͷڥʹ in Λ͚ͭΔ
{ (x: Int, y: Int) -> Int in
return x + y
}
͜ΕͰΫϩʔδϟͷɹ*\(^o^)/*
{ (x: Int, y: Int) -> Int
ɹ return x + y
}
ˡؔͷఆٛ
ˡؔͷ࣮
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ؔΦϒδΣΫτʹ͍ͭͯ
໊લͷ͋Δී௨ͷؔͳΒɺ
໊લͰݺͼग़͍͍͚ͤͲ
ͦͦͷ໊લͷແ͍ؔͬͯͲ͏ͬͨΒݺͼग़͢ͷʁ
ͦ͜Ͱར༻͢Δͷ͕ؔΦϒδΣΫτ
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ؔΦϒδΣΫτʹ͍ͭͯ
ɹɹɹ ɹɹ= { (x: Int, y: Int) -> Int in
return x + y
}
ؔΦϒδΣΫτͷར༻
̍. มΛ༻ҙ͢Δ
̎. มʹΫϩʔδϟΛೖ͢Δ
ड͚ͨม͕ؔͦͷͷʹͳΓɺ
ҾΛࢦఆ͢Δ͜ͱͰΫϩʔδϟͷ
࣮ΛΑͼͩ͢͜ͱ͕Ͱ͖Δ
result(5, 10)
let result
/
/ 15
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ؔΦϒδΣΫτʹ͍ͭͯ
ؔΛΦϒδΣΫτɺҰͭͷͱͯ͠ѻ͑Δͬͯ͜ͱɺ
StringIntͷΑ͏ͳܕΈ͍ͨʹ͑Δͱ͍͏͜ͱ
class Sample1 {
let name: String = “Sample1”
let sampleFunc = { (x: Int, y: Int) -> Int in
return x + y
}
}
let sample1: Sample1 = Sample1()
sample1.name
sample1.sampleFunc(10, 5)
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ؔΦϒδΣΫτʹ͍ͭͯ
ܕਪΛলུ͠ͳ͍ܗͰॻ͘ͱ
ؔͷఆٛ෦͕ܕʹͳΔɻ
class Sample2 {
let name: String = “Sample2”
let sampleFunc: (x: Int, y: Int) -> Int
= { (x: Int, y: Int) -> Int in
return x + y
}
}
ˡؔͷఆٛ
let sample2: Sample2 = Sample2()
sample2.name
sample2.sampleFunc(x: 10, y: 5)
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ؔΦϒδΣΫτʹ͍ͭͯ
Ϋϩʔδϟ͚ͩͰͳ͘ɺී௨ͷ໊લͷ͋Δؔؔ
ΦϒδΣΫτΛར༻Ͱ͖ΔͷͰצҧ͍͠ͳ͍ͰͶɻ
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ಥવͷ༷มߋʂʂ
ࠓͷྫͰ͠ࢉͱ͍͏ؚ࣮ΜͩΫϩʔδϟΛѻͬ
͍ͯΔ͚ͲɺҾ͖ࢉ͔͚ࢉͰ͖ΔΑ͏ʹ͍ͨ͠ʂʂ
͜ͷ༷Ճ͕͋ͬͨ߹Λߟ͑ͯΈΑ͏
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͜Μͳίʔυॻ͚Δ͚Ͳ
class Sample3 {
func getSampleFunc(type: Int) -> ((x: Int, y: Int) -> Int) {
var result = { (x: Int, y: Int) -> Int in
return x + y
}
switch type {
case 0:
result = { (x: Int, y: Int) -> Int in
return x - y
}
case 1:
result = { (x: Int, y: Int) -> Int in
return x * y
}
default:
break
}
return result
}
}
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࣮ͷ͋Δ߹
࣮ΛͬͨΫϩʔδϟͩͱ
༷มߋɺՃ͕ى͖ͨ߹ɺ
ͳΜͲ࣮෦ίʔυͷॻ͖͑Δඞཁ͕ग़ͯ͘Δ
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࣮
࣮ͷແ͍ɺؔͷఆٛͷ෦ͷΈͷΫϩʔδϟ
ؔΦϒδΣΫτͱͯ͠͏͜ͱ͕Մೳʂʂ
࣮ͷແ͍Ϋϩʔδϟݺͼग़͠ݩͰ࣮Λߦ͏ɻ
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࣮ͷແ͍Ϋϩʔδϟ
class Sample4 {
func getSampleFunc(
paramX: Int,
paramY: Int,
result: ((x: Int, y: Int) -> Void)) {
result(x: paramX, y: paramY)
}
}
let sample4: Sample4 = Sample4()
sample4.getSampleFunc(100, paramY: 10,
result: { (x: Int, y: Int) -> Void in
print(x + y)
print(x - y)
print(x * y)
})
ˡ͠ࢉͰҾ͖ࢉͰ
ࢥ͍ͷ··
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Ϋϩʔδϟͷར
Ϋϩʔδϟ࣮ͷແ͍ؔͷఆٛͷ෦͚ͩΛѻ͏͜ͱɺ
ݺͼग़͠ݩͰࣗ༝ʹ࣮Ͱ͖ΔࣄʹΑͬͯɺ
มߋʹڧ͍ॊೈͳίʔυ͕ॻ͚ΔΑ͏ʹͳΓ·͢ʂʂ
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มͷΩϟϓνϟͱϝϞϦͷϦʔΫ
͜ΜͳʹศརͳΫϩʔδϟ͕ͩɺҙ͕͋Γ·͢ɻ
ͦΕ͕มͷΩϟϓνϟͷͰ͢ɻ
มͷΩϟϓνϟͱ
Ϋϩʔδϟͷ֎Ͱએݴ͞ΕͨมΛ
ΫϩʔδϟͰར༻͢Δͱ
มͷΩϟϓνϟ͕ߦΘΕΔɻ
Ωϟϓνϟ͞ΕͨมΫϩʔδϟ͕ऴྃͯ͠ɺ
ϝϞϦ͕ղ์͞Εͳ͍ɻ
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มͷΩϟϓνϟͱϝϞϦͷϦʔΫ
class Sample5 {
var total : Int = 0
lazy var result: (x: Int, y: Int) -> Void
= { (x: Int, y: Int) -> Void in
self.total = x + y
}
}
let sample5: Sample5 = Sample5()
sample5.result(x: 100, y: 10)
sample5.total // →110
͠Ϋϩʔδϟऴྃޙ
ม͕ഁغ͞ΕͨΒ
total0ʹͳΔ
ΠϯελϯεมͰ
એݴ͍ͯ͠Δtotal͕
Ωϟϓνϟ͞ΕΔ
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มͷΩϟϓνϟͱϝϞϦͷϦʔΫ
class Sample5 {
var total : Int = 0
lazy var result: (x: Int, y: Int) -> Void
= { (x: Int, y: Int) -> Void in
self.total = x + y
}
}
มͷΩϟϓνϟ͕ى͜ΔͱࢀরΧϯτ͕Ճࢉ͞Ε
ΦϒδΣΫτ͕ഁغ͞Εͳ͘ͳΔ߹͕͋Δ
var sample5: Sample5? = Sample5()
sample5?.result(x: 100, y: 10)
sample5 = nil
ˡࢀরΧϯτʴ̍
ˡࢀরΧϯτʴ̍
ˡࢀরΧϯτʔ̍
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มͷΩϟϓνϟͱϝϞϦͷϦʔΫ
ϝϞϦϦʔΫΛ͙ʹΫϩʔδϟͷ࢝·Γͷޙʹɹ
[unowned self] Λ͚ͭΔ
class Sample6 {
var total: Int = 0
lazy var result: (x: Int, y: Int) -> Void
= { (x: Int, y: Int) -> Void in
self.total = x + y
}
}
class Sample6 {
var total: Int = 0
lazy var result: (x: Int, y: Int) -> Void
= {[unowned self] (x: Int, y: Int) -> Void in
self.total = x + y
}
}
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มͷΩϟϓνϟͱϝϞϦͷϦʔΫ
ͱݴͬͯຊʹղ์͞Ε͍ͯΔ͔৺ʁʁ
deinitΛهड़ͯ͠ղ์Λ֬ೝͯ͠ΈΑ͏
class Sample7 {
var total: Int = 0
lazy var result: (x: Int, y: Int) -> Void
= {[unowned self] (x: Int, y: Int) -> Void in
self.total = x + y
}
deinit {
print(“Sample7 class deinit call”)
}
}
var sample7: Sample7? = Sample7()
sample7?.result(x: 100, y: 10)
sample7?.total
sample7 = nil
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มͷΩϟϓνϟͱϝϞϦͷϦʔΫ
มͷΩϟϓνϟ͕ى͜ΔͱඞͣϝϞϦϦʔΫ͕ൃੜ͢
ΔΘ͚Ͱແ͍ɻSwift͕ࣗಈతʹϝϞϦΛղ์͢Δ߹
͋ΔͷͰצҧ͍͠ͳ͍ͰͶɻ
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XcodeͰͷϝϞϦϦʔΫνΣοΫ
ϝϞϦϦʔΫίʔυΛಡΜͰஅͣ͠Β͍͠ɺ
͏͢Ͱʹ͔ͳΓͷྔͷίʔυΛॻ͍ͯ͠·͍ͬͯΔɻ
ͦ͜ʹdeinitΛՃͯ֬͠ೝ͍ͯ͘͠ͷେมͬͯਓͷͨΊʹ
XcodeͰͷϝϞϦϦʔΫͷνΣοΫͷํΛղઆ͠·͢ɻ
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XcodeͰͷϝϞϦϦʔΫνΣοΫ
1. ϝχϡʔ͔ΒProfileΛબ
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XcodeͰͷϝϞϦϦʔΫνΣοΫ
2. Instruments͕ىಈ͠chose a profiling template forͷϝ
χϡʔ͕දࣔ͞ΕΔͷͰLeaksΛબ
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XcodeͰͷϝϞϦϦʔΫνΣοΫ
3. Leaks͕ىಈͨ͠Βɺ͏ҰXcodeΛProfileͷ··࣮ߦ
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XcodeͰͷϝϞϦϦʔΫνΣοΫ
4.ແ͍߹LeaksʹͷνΣοΫ͕දࣔ͞ΕΔ
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XcodeͰͷϝϞϦϦʔΫνΣοΫ
5.ϦʔΫ͍ͯ͠Δ߹͍όπϚʔΫ͕දࣔ͞ΕΔɺ
·ͨࢦఠՕॴΛΫϦοΫ͢Δͱৄࡉใ͕ݟ͑Δ
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·ͱΊ
* Ϋϩʔδϟͱແ໊ؔͷ͜ͱ
* ͍͖ͳΓΫϩʔδϟΛॻ͘ͷ͕ۤखͳਓ·ͣɺ໊લͷ͋Δී௨ͷؔ
Λ͔͍ͯΫϩʔδϟʹ͍ͯ͜͠͏ɻ
* ΫϩʔδϟΦϒδΣΫτɺͭ·Γɺܕͱͯ͠ར༻Ͱ͖Δ
* ࣮ͷແ͍ΫϩʔδϟΛར༻͠ݺͼग़͠ݩͰ࣮Λهड़͢Δ͜ͱͰ
มߋʹڧ͍ॊೈͳίʔυ͕ॻ͘ࣄ͕Ͱ͖Δɻ
* มͷΩϟϓνϟʹؾΛ͚ͭͯ॥ࢀরͷίʔυΛ࡞Γ͜ΜͰ͠·͏
* ϦʔΫ͕৺ͳΒXcodeͰνΣοΫ͓͖ͯ͠·͠ΐ͏
* ΫϩʔδϟΛ͍͜ͳͯ͠ॳڃऀ͔ΒதڃऀͷϓϩάϥϚͷୈҰาʹʂ
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One More Thing
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࣍ճ༧ࠂʂ
ษڧձͰൃද͢Δ͢ΔٗΛଓ͚ͯ
ͳ͔ͳ͔ࢥ͍Εͳ͍ͷͰɺ
͜͜Ͱ࣍ճൃද͢Δ͜ͱΛ༧ࠂ͢Δ͜ͱͰ
ࣗΛ͍ࠐ͏ͱ͓͍·͢ɻɻɻ
ͱ͍͏ࣄͰɺ࣍ൃද͠·͢ɻ
(͜ͷษڧ͡Όͳ͍Մೳੑ͋Γ·͢)
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ษڧձͰͷൃද͜Ε͔Βͩʂ
࣍ճͷษڧձൃදΛָ͓͠Έʹɻ
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Thank You
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ