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ユーザインターフェイスと非同期処理
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cockscomb
May 15, 2018
Programming
5
1.8k
ユーザインターフェイスと非同期処理
Presented at Bonfire iOS #4
cockscomb
May 15, 2018
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Transcript
ϢʔβΠϯλʔϑΣΠεͱ ඇಉظॲཧ
id:cockscomb Ճ౻ਘथ גࣜձࣾͯͳ γχΞΞϓϦέʔγϣϯΤϯδχΞ
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88%$Ͳ͏Ͱ͚ͨͬ͠
J04 w "3,JU$PSF.- w 6*,JU w %SBHBOE%SPQ w 'JMFT
J04ͷ֓ཁ Ӭٱ "3,JU అमҰ $PSF.-
٢ా༔Ұ 4XJGUͷ৽ػೳͱΞοϓσʔτ ాᠳ 9DPEFͷ৽ػೳ ࡔాߊҰ %SBHBOE%SPQ Ճ౻ਘथ 'JMFTͱ%PDVNFOU#BTFE"QQMJDBUJPO Ճ౻ਘथ 6*,JUͷΨΠυϥΠϯͷมߋͱ "VUP-BZPVUͷ৽ػೳɺΞοϓσʔτᬒ༤հ $PSF/'$ ؛ࠀݾ 1%',JU ؛ࠀݾ 4JSJ,JU ؛ࠀݾ )PNF,JUೖͱJ04ʹ͓͚Δ৽ػೳ ॴ༑ଠ .FUBM అमҰ "VEJP.FEJBؔ࿈ ৽ϑϨʔϜϫʔΫͱΞοϓσʔτ Ӭٱ
63-4FTTJPO5BTL open class URLSessionTask : NSObject, NSCopying, ProgressReporting { @available(iOS
11.0, *) open var progress: Progress { get } }
public protocol ProgressReporting : NSObjectProtocol { public var progress: Progress
{ get } }
%SBHBOE%SPQ open class NSItemProvider : NSObject, NSCopying { @available(iOS 11.0,
*) open func registerDataRepresentation(forTypeIdentifier typeIdentifier: String, visibility: NSItemProviderRepresentationVisibility, loadHandler: @escaping ((Data?, Error?) -> Swift.Void) -> Progress?) }
None
1SPHSFTT3FQPSUJOH w ඇಉظॲཧͷঢ়گΛϢʔβΠϯλʔϑΣΠεʹөͰ͖Δ w "DUJWJUZ*OEJDBUPS1SPHSFTT#BSΛදࣔ͢ΔͱΑ͍ w l)VNBO*OUFSGBDF(VJEFMJOFTr1SPHSFTT*OEJDBUPSTzΑΓ w ݱࡏͷ3Y4XJGUͰѻ͏ͷ͍͠
<2>ͳͥඇಉظʹ͢Δͷʁ
None
<2>ͳͥඇಉظʹ͢Δͷʁ ϝΠϯεϨουͷ3VO-PPQΛࢭΊͨ͘ͳ͍͔Β ࢭΊͯ͠·͏ͱΧΫΧΫ͢Δ
<2>ΈΜͳͲ͏ͯ͠Δʁ
3FBDUlTVTQFOTFz const movieDetailsFetcher = createFetcher( fetchMovieDetails ) const MovieDetails: React.SFC<MovieDetailsProps>
= ({id}) => { const movie = movieDetailsFetcher.read(id) return ( <div className="MovieDetails"> <MoviePoster src={movie.poster} /> <h1>{movie.title}</h1> <MovieMetrics {...movie} /> </div> ) }
'MVUUFS w 3FBDUʹΠϯεύΠΞ w %BSUΛ͏
Future<AtomFeed> fetchAtom(String atomUrl) async { var atomXml = await http.read(atomUrl);
return parse(atomXml); } class Feed extends StatelessWidget { final String url; const Feed({Key key, this.url}) : super(key: key); @override Widget build(BuildContext context) { var entries = new FutureBuilder<AtomFeed>( future: fetchAtom(url), builder: (context, snapshot) { if (snapshot.hasData) { var feed = snapshot.data; return new Entries(feed: feed); } else if (snapshot.hasError) { return new Text("${snapshot.error}"); } return new CircularProgressIndicator(); }); return new Scaffold( appBar: new AppBar(title: new Text("Feed")), body: entries, ); } }
w એݴతͳ6*ϑϨʔϜϫʔΫ͕ྲྀߦ w 3FBDU 'MVUUFS w ඇಉظॲཧΛѻ͍͘͢͢ΔΈ w 3FBDUͷTVTQFOTF w
'MVUUFSͷ'VUVSF#VJMEFS w .BS[JQBOͲ͏ͳΔʁ
.BS[JQBO w Ͳ͏͍͏ͷ͔ w 6*,JUͷҠ২ʁ w ৽͍͠6*ϑϨʔϜϫʔΫʁ w 4XJGUͱͷੑ w
ͦͦൃද͞ΕΔͷ͔