WidgetKitで良い体験を作るには / Good experience with WidgetKit

#iOSDC
https://fortee.jp/iosdc-japan-2021/proposal/37c0a8f3-58cc-424a-a32b-ba136c93aac2

References:
- Keeping a Widget Up To Date

- https://developer.apple.com/documentation/widgetkit/keeping-a-widget-up-to-date

- Principles of great widgets
　
- https://developer.apple.com/videos/play/wwdc2021/10048/
- Add configuration and intelligence to your widgets
- https://developer.apple.com/videos/play/wwdc2020/10194
- Add intelligence to your widgets
- https://developer.apple.com/videos/play/wwdc2021/10049/
- Donate intents and expand your app’s presence
- https://developer.apple.com/videos/play/wwdc2021/10231
- Downloading Files in the Background
- https://developer.apple.com/documentation/foundation/url_loading_system/downloading_files_in_the_background
- Human Interface Guidelines

- https://developer.apple.com/design/human-interface-guidelines/widgets/overview/introduction/

Transcript

1. ©︎ 2021 Yahoo Japan Corporation All rights reserved. WidgetKitͰྑ͍ମݧΛ࡞Δʹ͸ Tatsuya Tanaka / ాத ୡ໵ iOSDC Japan 2021 (#iosdc)
2. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ాத ୡ໵ / ͨͳͨͭ • Ϡϑʔגࣜձࣾ ɹɾiOSΞϓϦͷԣஅత։ൃ΍ٕज़త՝୊ͷղܾ @tattn @tanakasan2525 @tattn
3. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ΢ΟδΣοτ
4. ©︎ 2021 Yahoo Japan Corporation All rights reserved. iOS 14͔ΒϗʔϜը໘ͳͲʹ΢ΟδΣοτ͕ઃஔՄೳʹ ΞϓϦΛ։͔ͳͯ͘΋ΞϓϦͷػೳͷҰ෦ΛఏڙͰ͖Δ IUUQTBCPVUZBIPPDPKQQSSFMFBTFC
5. ©︎ 2021 Yahoo Japan Corporation All rights reserved. WidgetKitͱ͸
6. ©︎ 2021 Yahoo Japan Corporation All rights reserved. WidgetKit ΢ΟδΣοτΛ࡞੒͢Δʹ͸WidgetKitϑϨʔϜϫʔΫΛ࢖͏ ΢ΟδΣοτͷUI͸SwiftUIͰ࡞Δ @main struct WidgetExtension: Widget { let kind: String = "CatWidget" var body: some WidgetConfiguration { StaticConfiguration(kind: kind, provider: Provider()) { entry in WidgetEntryView(entry: entry) } .configurationDisplayName("ೣ΢ΟδΣοτ") .description("ೣͷࣸਅ͕ϥϯμϜͰ੾ΓସΘΔ΢ΟδΣοτ") } }
7. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ઃఆͷ͋Δ΢ΟδΣοτͱͳ͍΢ΟδΣοτ ̎छྨͷઃఆ͕͋Γɺݸผઃఆͷ͋Δͳ͠ʹΑͬͯ࢖͍෼͚Δ StaticCon fi guration IntentCon fi guration
8. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ઃఆͷ͋Δ΢ΟδΣοτͱͳ͍΢ΟδΣοτ StaticCon fi guration IntentCon fi
9. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ઃఆͷ͋Δ΢ΟδΣοτͱͳ͍΢ΟδΣοτ StaticCon fi guration ̎छྨͷઃఆ͕͋Γɺݸผઃఆͷ͋Δͳ͠ʹΑͬͯ࢖͍෼͚Δ
10. ©︎ 2021 Yahoo Japan Corporation All rights reserved. Timeline ΢ΟδΣοτͷࣗಈߋ৽͸ࣄલʹઃఆͨ͠TimelineʹΑͬͯߦΘΕΔ 8:00 10:00 12:00 14:00 16:00 18:00 20:00 Timeline ※SwiftUIͷ@State౳Ͱͷߋ৽͸Ͱ͖ͳ͍
11. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ਖ਼͘͠ಈ࡞ͤ͞ΔͨΊʹ 
 ஌͓ͬͯ͘΂͖͜ͱ
12. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ͜ͷΑ͏ͳ࣌ܭ΢ΟδΣοτ࣮૷Ͱ͖Δʁ
13. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ͜ͷΑ͏ͳ࣌ܭ΢ΟδΣοτ࣮૷Ͱ͖Δʁ
14. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ߴ͍ස౓Ͱͷߋ৽͸Ͱ͖ͳ͍ ΢ΟδΣοτͷߋ৽ස౓ʹ͸੍ݶ͕͋Γɺຖඵߋ৽͸Ͱ͖ͳ͍ IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOXJEHFULJULFFQJOHBXJEHFUVQUPEBUF ※Entryؒ͸5෼ִؒҎ্Λਪ঑
15. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ΢ΟδΣοτͷ༧ࢉ ֤΢ΟδΣοτʹ͸༧ࢉ͕͋Γɺ༧ࢉΛ࢖༻ͯ͠Ϧϩʔυ͞ΕΔ IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOXJEHFULJULFFQJOHBXJEHFUVQUPEBUF
16. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ΢ΟδΣοτͷ༧ࢉ ֤΢ΟδΣοτʹ͸༧ࢉ͕͋Γɺ༧ࢉΛ࢖༻ͯ͠Ϧϩʔυ͞ΕΔ IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOXJEHFULJULFFQJOHBXJEHFUVQUPEBUF ߋ৽ ༧ࢉ: X ༧ࢉ: X - a ίετ (a)
17. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ΢ΟδΣοτͷ༧ࢉ ֤΢ΟδΣοτʹ͸༧ࢉ͕͋Γɺ༧ࢉΛ࢖༻ͯ͠Ϧϩʔυ͞ΕΔ IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOXJEHFULJULFFQJOHBXJEHFUVQUPEBUF ߋ৽ ༧ࢉ: X ༧ࢉ: X - a ίετ (a) ༧ࢉ͕ͳ͘ͳΔ (X - a < 0) ৔߹͸΢ΟδΣοτΛߋ৽Ͱ͖ͳ͍ 
 ༧ࢉ͸24࣌ؒͰϦηοτ͞ΕΔ
18. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ΢ΟδΣοτͷ༧ࢉ ༧ࢉ͸֤΢ΟδΣοτ͝ͱʹҟͳΓɺར༻ঢ়گʹΑܾͬͯ·Δ IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOXJEHFULJULFFQJOHBXJEHFUVQUPEBUF ༧ࢉ: X ʹ ໿40ʙ70ճ/day → ໿15ʙ30෼ִؒͷϦϩʔυ͕ݶք Α͘දࣔ͞ΕΔ΢ΟδΣοτͷ৔߹
19. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ΢ΟδΣοτͷ༧ࢉର৅֎ ҎԼͷ৔߹ʹ͸༧ࢉΛ࢖ΘͣʹϦϩʔυͰ͖Δ IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOXJEHFULJULFFQJOHBXJEHFUVQUPEBUF ɾΞϓϦຊମ͕ϑΥΞάϥ΢ϯυ࣌ ɾΞϓϦຊମͰԻָ࠶ੜத΍Ґஔ৘ใऔಘத ɾγεςϜʹΑΔߋ৽ ɹɾ୺຤ͷݴޠมߋ࣌ ɹɾDynamicType΍Accessibilityͷઃఆมߋ࣌ ɹɾσʔλ͕ݹ͍Մೳੑͷ͋Δ΢ΟδΣοτͷදࣔ࣌
20. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ڊେͳσʔλΛѻ͏΢ΟδΣοτ ɾຊମΞϓϦͰ࢖͍ͬͯΔڊେͳWeb APIΛෳ਺૊Έ߹Θͤͯѻ͏ ɾຊମΞϓϦͰ࡞੒ͨ͠ڊେͳอଘσʔλΛಡΈࠐΉ ྫ͑͹
21. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ΢ΟδΣοτʹඞཁͳσʔλ͚ͩΛѻ͓͏ ɾ΢ΟδΣοτ༻ʹσʔλྔͷগͳ͍Web APIΛ༻ҙ͢Δ ɾ΢ΟδΣοτ༻ʹ੾Γग़ͨ͠σʔλΛอଘͯͦ͠ΕΛಡΈࠐΉ ΢ΟδΣοτ͸ϝϞϦ੍ݶ͕ݫ͍͠ (࠷େ30MB) IUUQTEFWFMPQFSBQQMFDPNGPSVNTUISFBE ※࣮ػͰಈ͔͢ͱྫ֎ʹͳΔ ޻෉͕ඞཁ
22. ©︎ 2021 Yahoo Japan Corporation All rights reserved. όοΫάϥ΢ϯυηογϣϯ ࣌ؒͷ͔͔Δ௨৴΍ѱ͍௨৴؀ڥ౳Λαϙʔτ͢ΔͨΊʹ 
 όοΫάϥ΢ϯυ௨৴΋׆༻Ͱ͖Δ @main struct WidgetExtension: Widget { private let kind = "CatWidget" var body: some WidgetConfiguration { StaticConfiguration(kind: kind, provider: Provider()) { entry in CatWidget(entry: entry) } .onBackgroundURLSessionEvents(matching: "get_huge_data") { identifier, completion in BackgroundFetcher.shared.completion = completion BackgroundFetcher.shared.restoreURLSessionIfNeeded() } .configurationDisplayName("ೣ΢ΟδΣοτ") .description("ೣͷࣸਅ͕ϥϯμϜͰ੾ΓସΘΔ΢ΟδΣοτ") } }
23. final class BackgroundFetcher: NSObject, URLSessionDownloadDelegate { static let shared = BackgroundFetcher() var completion: (() -> Void)? private lazy var session: URLSession = { let config = URLSessionConfiguration.background(withIdentifier: "get_huge_data") config.isDiscretionary = true // ిݯ઀ଓத΍WiFi઀ଓதͳͲͷྑ͍λΠϛϯάͰDL return URLSession(configuration: config, delegate: self, delegateQueue: nil) }() func restoreURLSessionIfNeeded() { _ = session } // getTimeline౳͔Βݺͼग़͢ func setDownloadSchedule(completion: (() -> Void)? = nil) { session.getTasksWithCompletionHandler { _, _, downloadTasks in defer { completion?() } guard downloadTasks.isEmpty else { return } let task = Self.shared.session.downloadTask(with: URL(string: "https://****")!) task.earliestBeginDate = <࣍ͷϦϩʔυλΠϛϯάΑΓલʹઃఆ> task.countOfBytesClientExpectsToSend = 500 task.countOfBytesClientExpectsToReceive = 8 * 1024 * 1024 task.resume() } } func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) { // DLͨ͠σʔλΛDocumentsσΟϨΫτϦͳͲʹҠಈͯ͠ޙ͔ΒऔಘͰ͖ΔΑ͏ʹ͢Δ } func urlSessionDidFinishEvents(forBackgroundURLSession session: URLSession) { completion?() completion = nil WidgetCenter.shared.reloadTimelines(ofKind: "CatWidget") } } ɾσʔλΛࣄલDL͢ΔͱಡΈࠐΈ଴ͪΛ࡟ݮͰ͖Δ 
 ɾϦτϥΠॲཧ౳ͰΑΓ࣮֬ʹϑΣονͰ͖Δ
24. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ΑΓྑ͍΢ΟδΣοτΛ 
 ࣮૷͢ΔͨΊʹ
25. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ద੾ͳߋ৽࣮૷Λ͠Α͏ ΢ΟδΣοτʹ͓͍ͯେ੾ͳͷ͸৘ใͷߋ৽ ͨͩ͠ɺա౓ͳߋ৽͸௨৴ྔ΍όοςϦʔফඅɺαʔόʔෛՙʹؔΘΔ IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOXJEHFULJULFFQJOHBXJEHFUVQUPEBUF
26. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ద੾ͳߋ৽࣮૷Λ͠Α͏ ɾEntry 
 ɹɹɾͰ͖Δ͚ͩઌ·Ͱઃఆ͢Δ 
 ɹɹɾEntry͸ִؒΛ௕Ίʹ (࠷௿5෼ִؒҎ্) 
 
 ɾϦϩʔυϙϦγʔ IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOXJEHFULJULFFQJOHBXJEHFUVQUPEBUF ΢ΟδΣοτʹ͓͍ͯେ੾ͳͷ͸৘ใͷߋ৽ ͨͩ͠ɺա౓ͳߋ৽͸௨৴ྔ΍όοςϦʔফඅɺαʔόʔෛՙʹؔΘΔ
27. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (atEnd) .atEnd 6:00 12:00 19:00 6:00 12:00 19:00 6:00 Timelineʹ͋ΔEntryΛॱʹදࣔ͢Δ ࠷ޙͷEntry͕දࣔ͞ΕΔͱϦϩʔυϑϥά͕ONʹͳΔ Timeline
28. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (atEnd) .atEnd 6:00 12:00 19:00 6:00 12:00 19:00 6:00 Timeline γεςϜʹΑͬͯࣗಈతʹϦϩʔυ͕࣮ߦ͞ΕΔ 
 ͨͩ͠ɺਖ਼֬ͳ࣌ࠁʹϦϩʔυ͞ΕΔΘ͚Ͱ͸ͳ͍
29. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (atEnd) .atEnd 6:00 12:00 19:00 6:00 12:00 19:00 6:00 Timeline γεςϜʹΑͬͯࣗಈతʹϦϩʔυ͕࣮ߦ͞ΕΔ 
 ͨͩ͠ɺਖ਼֬ͳ࣌ࠁʹϦϩʔυ͞ΕΔΘ͚Ͱ͸ͳ͍
30. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (atEnd) .atEnd 6:00 12:00 19:00 6:00 12:00 19:00 6:00 Timeline γεςϜʹΑͬͯࣗಈతʹϦϩʔυ͕࣮ߦ͞ΕΔ 
 ͨͩ͠ɺਖ਼֬ͳ࣌ࠁʹϦϩʔυ͞ΕΔΘ͚Ͱ͸ͳ͍
31. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (atEnd) .atEnd 6:00 12:00 19:00 6:00 12:00 19:00 6:00 ɾະདྷͷ಺༰͕༧ଌͰ͖Δ΋ͷ ɾ࣌ؒܦաʹΑͬͯؔ࿈ੑ΍ਖ਼֬ੑ͕ࣦΘΕʹ͍͘΋ͷ Timeline ༻్
32. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (afterDate) .afterDate ࢦఆͨ࣌ؒ͠ʹߋ৽͞ΕΔ Timeline 6:00 19:00 12:00 19:00 6:00 12:00
33. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (afterDate) .afterDate Timeline 6:00 19:00 12:00 19:00 6:00 12:00 let nextDate = [6, 12, 19].compactMap { calendar.nextDate(after: Date(), matching: .init(hour: $0, minute: 0), matchingPolicy: .nextTime) } .min()! let timeline = Timeline(entries: entries, policy: .after(nextDate))
34. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (afterDate) .afterDate Timeline 6:00 12:00 19:00 12:00 19:00 6:00 αʔόʔ΁ͷϦΫΤετ͕ूத͢ΔͨΊɺ 
 ཚ਺౳Ͱߋ৽λΠϛϯάΛ෼ࢄͤͨ͞΄͏͕ྑ͍
35. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (afterDate) .afterDate Timeline 6:00 12:00 19:00 12:00 19:00 6:00 αʔόʔ΁ͷϦΫΤετ͕ूத͢ΔͨΊɺ 
 ཚ਺౳Ͱߋ৽λΠϛϯάΛ෼ࢄͤͨ͞΄͏͕ྑ͍
36. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (afterDate) .afterDate ස౓ߴ͘ߋ৽ͯ͠͠·͏ͱ༧ࢉ͕ͳ͘ͳΓɺ 
 ϦϩʔυͰ͖ͳ͘ͳΔͷͰ஫ҙ Timeline 6:00 12:00 19:00 12:00 19:00 6:00
37. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (afterDate) .afterDate Timeline 6:00 12:00 19:00 12:00 19:00 6:00 ɾະདྷͷ಺༰͕༧ଌͰ͖ͳ͍΋ͷ ɾਫ਼౓΍ؔ࿈ੑ͕࣌ؒʹΑͬͯมԽ͢Δ΋ͷ ༻్
38. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (never) .never ࣗಈͰ͸Ϧϩʔυ͞Εͳ͍
39. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (never) reloadTimelines .never ϦϩʔυAPIΛΞϓϦ͔Βݺͼग़͢͜ͱͰߋ৽Ͱ͖Δ
40. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ϦϩʔυϙϦγʔ (never) reloadTimelines .never ɾΞϓϦͷૢ࡞΍ϓογϡ௨஌౳Λى఺ʹߋ৽͢Δ΋ͷ ༻్
41. ©︎ 2021 Yahoo Japan Corporation All rights reserved. Human Interface GuidelinesΛ֬ೝ͠Α͏ ɾΞϓϦͷϝΠϯػೳʹؔ࿈ͨ͠৘ใΛఏڙ͢Δ ɾΞϓϦΛىಈ͢Δ͚ͩͷ΢ΟδΣοτ͸ආ͚Δ ɾҰ೔Λ௨ͯ͠มԽ͢Δίϯςϯπ͕͓͢͢Ί ɾΠϯλϥΫγϣϯ෦෼͸গͳΊʹ ɾϑΥϯτ͸SF ProɺαΠζ͸11ptҎ্ਪ঑ IUUQTEFWFMPQFSBQQMFDPNEFTJHOIVNBOJOUFSGBDFHVJEFMJOFTXJEHFUTPWFSWJFXJOUSPEVDUJPO ͔ͳΓ۩ମతʹࢦ਑͕ࣔ͞Ε͍ͯΔ
42. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ৭΍ϑΥϯτͰϒϥϯυΛදݱ͠Α͏ ΢ΟδΣοτ௥Ճ࣌ͷϘλϯΧϥʔ΍ฤू࣌ͷ৭ͳͲ΋ΧελϚΠζͰ͖Δ IUUQTEFWFMPQFSBQQMFDPNWJEFPTQMBZXXED
43. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ਅͬࠇʹͳͬͨ΢ΟδΣοτݟͨ͜ͱ͋Γ·ͤΜ͔ʁ
44. ©︎ 2021 Yahoo Japan Corporation All rights reserved. Ϋϥογϡ΍λΠϜΞ΢τʹىҼ͍ͯ͠Δ͜ͱ͕ଟ͍ Image(uiImage: UIImage(data: try! Data(contentsOf: .imageURL))!) .resizable() .scaledToFill() ௨৴౳ͷ஗ԆͳͲͰgetTimeline͕λΠϜΞ΢τͨ͠Γɺ 
 ࣮૷ͷ໰୊౳ͰΫϥογϡͨ͠Γ͢Δͱൃੜ͢Δ ΦϑϥΠϯ࣌ʹΫϥογϡͯ͠͠·͏ʂ 
 Data(contentsOf:_)͸஗͍௨৴؀ڥͷ৔߹ɺ 
 ਺ेඵεϨουΛࢭΊͯ͠·͍ɺϓϩηε͕མͱ͞Εͯ͠·͏͜ͱ΋... IUUQTEFWFMPQFSBQQMFDPNEPDVNFOUBUJPOGPVOEBUJPOOTEBUBJOJU
45. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ΤϥʔϋϯυϦϯά͸େࣄ ΢ΟδΣοτ͸Ϣʔβʔʹ࢖͍ํΛઆ໌͠ʹ͍͘ جຊ͸ઃஔ͢Δ͚ͩͰಈ͘Α͏ʹ͠ɺ 
 ਖ਼͘͠ಈ͍͍ͯͳ͍࣌͸ݪҼΛ఻͑ΒΕΔ࣮૷ʹ͠·͠ΐ͏ ɾઃఆ͕଍Γͳ͍or௨৴Τϥʔ౳ͷ৔߹͸ 
 ɹঢ়گ͝ͱʹద੾ͳରॲํ๏·ͨ͸ݪҼΛදࣔ͢Δ ɾData(contentsOf:_)͸Ͱ͖Δ͚ͩආ͚ͯɺgetTimeline౳Ͱ 
 ɹURLSessionΛ࢖ͬͯϦϞʔτͷը૾౳Λऔಘ͢Δ ಛʹ
46. ©︎ 2021 Yahoo Japan Corporation All rights reserved. γεςϜͱΞϓϦͷ࿈ܞ ɾεϚʔτϩʔςʔγϣϯ ɾ΢ΟδΣοτͷఏҊ ɾϩοΫը໘ͰͷఏҊ ɾεϙοτϥΠτͰͷఏҊ ɾSiriγϣʔτΧοτͷఏҊ ɾQuick Note ࠷ۙ͸γεςϜʹΑΔϨίϝϯυ͕ڧԽ͞Ε͍ͯΔ εϚʔτελοΫ NSUserActivity΍Intents ExtensionͰ࣮૷
47. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ·ͱΊ
48. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ྑ͍ମݧΛ࡞ΔͨΊʹ͸࢓༷Λཧղ͢Δ͜ͱ͕େࣄ ΢ΟδΣοτ͸ಛʹԼهͷཧղ͕େ੾ ະ஌ͷ࢓༷͸Ͳ͔͜ͰόάΛੜΈग़͢ ߋ৽ස౓ ϝϞϦ ϦϩʔυϙϦγʔ HIG σβΠϯ͢Δલʹ஌͓͖͍ͬͯͨ
49. ©︎ 2021 Yahoo Japan Corporation All rights reserved. ࢀߟจݙ ɾKeeping a Widget Up To Date 
 ɹɹɾhttps://developer.apple.com/documentation/widgetkit/keeping-a-widget-up-to-date 
 ɾPrinciples of great widgets 
 ɹɹɾhttps://developer.apple.com/videos/play/wwdc2021/10048/ ɾAdd con fi guration and intelligence to your widgets ɹɹɾhttps://developer.apple.com/videos/play/wwdc2020/10194 ɾAdd intelligence to your widgets ɹɹɾhttps://developer.apple.com/videos/play/wwdc2021/10049/ ɾDonate intents and expand your app’s presence ɹɹɾhttps://developer.apple.com/videos/play/wwdc2021/10231 ɾDownloading Files in the Background ɹɹɾhttps://developer.apple.com/documentation/foundation/url_loading_system/downloading_ fi les_in_the_background 
 ɾHuman Interface Guidelines 
 ɹɹɾhttps://developer.apple.com/design/human-interface-guidelines/widgets/overview/introduction/