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"TZOD4FRVFODF
ͬͯͳʹʁ
Ӊࠤݟެี
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Ӊࠤݟެีʢ!VTBNJLʣ
w 鳍鲟鳫鳢鳣גࣜձࣾJ04鲠鳫鲰鳃鲚鲾鲻鲧鳢鱅鳁
w ٕज़ಉਓࢽ
w $PNCJOF鲗鱴鱝鲆鲍鱋
w $PNCJOF鱭6*,JU鱰鲍鲐J04鲚鳏鳢։ൃ
w هࣄࣥච༧ఆ
w J04%$+BQBO$PNCJOF0QFSBUPS鲤鲜鳁
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4XJGU$PODVSSFODZ
w ඇಉظॲཧ鱑࣮鱜鲉鱞鱔鱯鲐ʢJ04Ҏ߱ʣ
w asyncawait
w 4USVDUVSFE$PODVSSFODZ
w "DUPS
w ࠓճ鱴asyncawait鱳
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BTZODBXBJUΛΘͳ͍߹
func fetchThumbnail(completion: (UIImage?, Error?) -> Void) {
let task = URLSession.shared.dataTask(with: request) { ...
if let error = error {
completion(nil, error)
} else {
// ... data / response ͷॲཧ ...
completion(thumbnail, nil)
}
}
task.resume()
}
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BTZODBXBJUΛ͏߹
func fetchThumbnail() async throws -> UIImage {
let (data, response)
= try await URLSession.shared.data(for: request)
// ... data / response ͷॲཧ ...
return thumbnail
}
w await鱳Օॴ鱬鲭鲱鳒鳫鳁ɺॲཧ鱑ऴ鲔鱨鱤鲎෮ؼ
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63-4FTTJPOͷϝιου
// async / await ඇରԠ൛
func dataTask(with request: URLRequest,
completionHandler:
(Data?, URLResponse?, Error?) -> Void)
-> URLSessionDataTask
// async / await ରԠ൛
func data(for request: URLRequest) async throws
-> (Data, URLResponse)
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"TZOD4FRVFODFͱ
w Sequence鱳asyncawaitରԠ൛
w 鱮鱋鱉鱋鱘鱭ʁ
w 鲃鱟Sequence鱳鱏鱚鲎鱉
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4FRVFODF
w Sequence鳏鳥鳀鲫鳣鱰४ڌ鱜鱤ܕ鱬鱴ɾɾɾ
w for-inߏจ鱑鱍鲐
w 鱴ಉظత鱰鱚鲑鲐
for quake in quakes {
// ... quake ͷॲཧ ...
}
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"TZOD4FRVFODF
w AsyncSequence鳏鳥鳀鲫鳣鱰४ڌ鱜鱤ܕ鱬鱴ɾɾɾ
w for-await-inߏจ鱑鱍鲐
w 鱴ඇಉظత鱰鱚鲑鲐
for await quake in quakes {
// ... quake ͷॲཧ ...
}
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4FRVFODFΛΠςϨʔλͰݟΔ
for quake in quakes {
// ... quake ͷॲཧ ...
}
var iterator = quakes.makeIterator()
while let quake = iterator.next() {
// ... quake ͷॲཧ ...
}
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"TZOD4FRVFODFΛΠςϨʔλͰݟΔ
for await quake in quakes {
// ... quake ͷॲཧ ...
}
var iterator = quakes.makeAsyncIterator()
while let quake = await iterator.next() {
// ... quake ͷॲཧ ...
}
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"TZOD4FRVFODFΦϖϨʔλ
let strings = quakes.map { (quake) -> String in
// ... quake Λ String ʹม ...
}
for await string in strings {
// ... string ͷॲཧ ...
}
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"TZOD4FRVFODFͷฒྻॲཧ
let task1 = async {
for await quake in quakes {
// ... quake ͷॲཧ ...
}
}
let task2 = async {
for await string in strings {
// ... string ͷॲཧ ...
}
}
// task1.cancel()
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$PNCJOFͱͷൺֱ
w AsyncSequence鱴$PNCJOF鱭ѻ鱋ྖҬ鱑ࣅ鱫鱉鲐
w AsyncSequence
w J04Ҏ߱ɺݴޠ鲄ࠐ鲄ߏจɺ鲯鳫鳏鳣鱬鱐鲏鲉鱞鱉
w $PNCJOF
w J04Ҏ߱ɺ鲢鳒鳤鱅鲷鱑๛ɺෳ鲱鳀鳢鱅鳘鱳鳖鱅鲰
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ࠓޙͲ͏ͳΔʁ
w ڞଘʁ
w $鱬鱴asyncawait鱭3Y鱑ࠞࡏ鱜鱫鲔鲑鱫鱉鲐
w ༥߹ʁ
w ༷ࡦఆத鱳AsyncStream鱑鱏ޓ鱉鲗༥߹鱞鲐鱐鲇ʁ
w ݱ࣌鱬鱴鱮鱦鲎鱭鲇鱉鱍鱯鱉
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ࢀߟใ
w 88%$鲳鲻鲯鳟鳫.FFU"TZOD4FRVFODF
w "1*鳢鳍鲙鳤鳫鲱AsyncSequence鳏鳥鳀鲫鳣
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