{"id":2087,"date":"2019-06-25T22:00:52","date_gmt":"2019-06-25T19:00:52","guid":{"rendered":"http:\/\/demensdeum.com\/blog\/?p=2087"},"modified":"2024-12-16T22:32:36","modified_gmt":"2024-12-16T19:32:36","slug":"%d0%a1%d1%82%d0%b5%d0%b9%d1%82-%d0%bc%d0%b0%d1%88%d0%b8%d0%bd%d0%b0-%d0%b8-%d0%bf%d0%b0%d1%82%d1%82%d0%b5%d1%80%d0%bd-%d0%a1%d0%be%d1%81%d1%82%d0%be%d1%8f%d0%bd%d0%b8%d0%b5","status":"publish","type":"post","link":"https:\/\/demensdeum.com\/blog\/ja\/2019\/06\/25\/%d0%a1%d1%82%d0%b5%d0%b9%d1%82-%d0%bc%d0%b0%d1%88%d0%b8%d0%bd%d0%b0-%d0%b8-%d0%bf%d0%b0%d1%82%d1%82%d0%b5%d1%80%d0%bd-%d0%a1%d0%be%d1%81%d1%82%d0%be%d1%8f%d0%bd%d0%b8%d0%b5\/","title":{"rendered":"\u30b9\u30c6\u30fc\u30c8\u30de\u30b7\u30f3\u3068\u30d1\u30bf\u30fc\u30f3\u306e\u6761\u4ef6"},"content":{"rendered":"

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\"\"
MEAACT PHOTO \/ STUART PRICE.<\/figcaption><\/figure>\n

\u30ed\u30fc\u30c9\u30aa\u30d6\u30d5\u30e9\u30c3\u30b0\u30b9<\/h3>\n

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\n
class MediaPlayer {\n\n    public var isHelpPresenting = false\n    public var isCaching = false\n    public var isMediaPlaying: Bool = false\n    public var isAnnouncementPlaying = false\n    public var isSafetyVideoPlaying = false\n\n    public var currentMedia: Media = null\n\n    fun play(media: Media) {\n\n        if isMediaPlaying == false, isAnnouncementPlaying == false, isSafetyVideoPlaying == false {\n\n            if isCaching == false {\n                if isHelpPresenting == false {\n                    media.playAfterHelpClosed()\n                }\n                else {\n                    media.playAfterCaching()\n                }\n            }\n    }\n\n    fun pause() {\n        if isAnnouncementPlaying == false, isSafetyVideoPlaying == false {\n            currentMedia.pause()\n        }\n    }\n}\n<\/code><\/pre>\n<\/div>\n
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\u7591\u4f3c\u30b3\u30fc\u30c9:<\/p>\n
\n
enum MediaPlayerState {\n\tmediaPlaying,\n\tmediaCaching,\n\tcrewSpeaking,\n\tsafetyVideoPlaying,\n\tpresentingHelp\n}\n\nclass MediaPlayer {\n\tfun play(media: Media) {\n\t\tmedia.play()\n\t}\n\n\tfunc pause() {\n\t\tmedia.pause()\n\t}\n}\n\nclass MediaPlayerStateMachine {\n\tpublic state: MediaPlayerState\n\tpublic mediaPlayer: MediaPlayer\n\tpublic currentMedia: Media\n\n\t\/\/.. init (mediaPlayer) etc\n\n\tpublic fun set(state: MediaPlayerState) {\n\t\tswitch state {\n\t\t\tcase mediaPlaying:\n\t\t\t\tmediaPlayer.play(currentMedia)\n\t\t\tcase mediaCaching, crewSpeaking,\n\t\t\tsafetyVideoPlaying, presentingHelp:\n\t\t\t\tmediaPlayer.pause()\n\t\t}\n\t}\n}\n<\/code><\/pre>\n<\/div>\n
\u30d5\u30e9\u30b0 \u30b7\u30b9\u30c6\u30e0\u3068\u30b9\u30c6\u30fc\u30c8 \u30de\u30b7\u30f3\u306e\u5927\u304d\u306a\u9055\u3044\u306f\u3001set(state: ..) \u30e1\u30bd\u30c3\u30c9\u306e\u8ad6\u7406\u72b6\u614b\u5207\u308a\u66ff\u3048\u30d5\u30a1\u30cd\u30eb\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u4eba\u9593\u306b\u3088\u308b\u72b6\u614b\u306e\u7406\u89e3\u3092\u30d7\u30ed\u30b0\u30e9\u30e0 \u30b3\u30fc\u30c9\u306b\u5909\u63db\u3067\u304d\u307e\u3059\u3002\u30b3\u30fc\u30c9\u304c\u3055\u3089\u306b\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b\u3068\u3001\u30d5\u30e9\u30b0\u3092\u72b6\u614b\u306b\u5909\u63db\u3059\u308b\u30b2\u30fc\u30e0\u3002<\/p>\n
\u30d1\u30bf\u30fc\u30f3\u306e\u72b6\u614b<\/h3>\n
\u6b21\u306b\u3001\u30b9\u30c6\u30fc\u30c8 \u30de\u30b7\u30f3\u306e\u5358\u7d14\u306a\u5b9f\u88c5\u3068\u30b9\u30c6\u30fc\u30c8 \u30d1\u30bf\u30fc\u30f3\u306e\u9055\u3044\u3092\u793a\u3057\u307e\u3059\u3002 10 \u500b\u306e\u72b6\u614b\u3092\u8ffd\u52a0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3068\u60f3\u50cf\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e\u7d50\u679c\u3001\u30b9\u30c6\u30fc\u30c8 \u30de\u30b7\u30f3 \u30af\u30e9\u30b9\u306f\u30b4\u30c3\u30c9\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b5\u30a4\u30ba\u307e\u3067\u5927\u304d\u304f\u306a\u308a\u3001\u7dad\u6301\u304c\u56f0\u96e3\u306b\u306a\u308a\u3001\u30b3\u30b9\u30c8\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002\u3082\u3061\u308d\u3093\u3001\u3053\u306e\u5b9f\u88c5\u306f\u30d5\u30e9\u30b0\u5b9f\u88c5\u3088\u308a\u3082\u512a\u308c\u3066\u3044\u307e\u3059 (\u30d5\u30e9\u30b0 \u30b7\u30b9\u30c6\u30e0\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u958b\u767a\u8005\u306f\u6700\u521d\u306b\u81ea\u5206\u81ea\u8eab\u3092\u6483\u3061\u307e\u3059\u3002\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\u30012 ^ 10 = 1024 \u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u898b\u3066\u3001QA \u306f\u9996\u3092\u540a\u308b\u3067\u3057\u3087\u3046\u3002\u305f\u3060\u3057\u3001\u4e21\u65b9\u3068\u3082 * \u6c17\u4ed8\u304b\u306a\u304b\u3063\u305f\u5834\u5408) * \u30bf\u30b9\u30af\u304c\u8907\u96d1\u306a\u5834\u5408\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u5358\u7d14\u306a\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u7279\u5b9a\u306e\u30d5\u30e9\u30b0\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u306e\u4f5c\u696d\u3092\u62d2\u5426\u3059\u308b\u3053\u3068\u306b\u6c17\u3065\u304f\u3067\u3057\u3087\u3046)
\u5dde\u306e\u6570\u304c\u591a\u3044\u5834\u5408\u306f\u5dde\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002
\u4e00\u9023\u306e\u30eb\u30fc\u30eb\u3092 State \u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u8ffd\u52a0\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\n
protocol State {\n    func playMedia(media: Media, context: MediaPlayerContext)\n    func shouldCacheMedia(context: MediaPlayerContext)\n    func crewSpeaking(context: MediaPlayerContext)\n    func safetyVideoPlaying(context:MediaPlayerContext)\n    func presentHelp(context: MediaPlayerContext)\n}\n<\/code><\/pre>\n<\/div>\n
\u4e00\u9023\u306e\u30eb\u30fc\u30eb\u306e\u5b9f\u88c5\u3092\u5225\u306e\u72b6\u614b\u306b\u79fb\u52d5\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u305f\u3068\u3048\u3070\u30011 \u3064\u306e\u72b6\u614b\u306e\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n
\n
class CrewSpeakingState: State {\n\tfunc playMedia(context: MediaPlayerContext) {\n\t\tshowWarning(\u201cCan\u2019 t play media - listen to announce!\u201d)\n\t}\n\n\tfunc mediaCaching(context: MediaPlayerContext) {\n\t\tshowActivityIndicator()\n\t}\n\n\tfunc crewSpeaking(context: MediaPlayerContext) {\n\t\tset(volume: 100)\n\t}\n\n\tfunc safetyVideoPlaying(context: MediaPlayerContext) {\n\t\tset(volume: 100)\n\t}\n\n\tfunc presentHelp(context: MediaPlayerContext) {\n\t\tshowWarning(\u201cCan\u2019 t present help - listen to announce!\u201d)\n\t}\n}\n<\/code><\/pre>\n<\/div>\n
\u6b21\u306b\u3001\u5404\u72b6\u614b\u304c\u6a5f\u80fd\u3059\u308b\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u3001\u72b6\u614b\u30de\u30b7\u30f3\u3092\u7d71\u5408\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\n
final class MediaPlayerContext {\n\tprivate\n\tvar state: State\n\n\tpublic fun set(state: State) {\n\t\tself.state = state\n\t}\n\n\tpublic fun play(media: Media) {\n\t\tstate.play(media: media, context: this)\n\t}\n\n\t\u2026\n\t\u043e\u0441\u0442\u0430\u043b\u044c\u043d\u044b\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u0441\u043e\u0431\u044b\u0442\u0438\u044f\n}\n<\/code><\/pre>\n<\/div>\n
\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3 \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u30d1\u30d6\u30ea\u30c3\u30af \u30e1\u30bd\u30c3\u30c9\u3092\u901a\u3058\u3066\u30b3\u30f3\u200b\u200b\u30c6\u30ad\u30b9\u30c8\u3068\u9023\u643a\u3057\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u5185\u306e\u30b9\u30c6\u30fc\u30c8 \u30de\u30b7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3069\u306e\u72b6\u614b\u304b\u3089\u3069\u306e\u72b6\u614b\u306b\u9077\u79fb\u3059\u308b\u304b\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002
\u3057\u305f\u304c\u3063\u3066\u3001God Object \u5206\u89e3\u3092\u5b9f\u88c5\u3057\u307e\u3057\u305f\u3002\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u5909\u66f4\u3092\u8ffd\u8de1\u3059\u308b\u30b3\u30f3\u30d1\u30a4\u30e9\u30fc\u306e\u304a\u304b\u3052\u3067\u3001\u5909\u5316\u3059\u308b\u72b6\u614b\u306e\u7dad\u6301\u304c\u306f\u308b\u304b\u306b\u7c21\u5358\u306b\u306a\u308a\u3001\u30b3\u30fc\u30c9\u884c\u6570\u306e\u524a\u6e1b\u306b\u3088\u308a\u72b6\u614b\u3092\u7406\u89e3\u3059\u308b\u8907\u96d1\u3055\u304c\u8efd\u6e1b\u3055\u308c\u3001\u6b21\u306e\u70b9\u306b\u7126\u70b9\u304c\u5f53\u3066\u3089\u308c\u307e\u3059\u3002\u7279\u5b9a\u306e\u72b6\u614b\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002\u307e\u305f\u30011 \u3064\u306e\u5927\u898f\u6a21\u306a\u30b9\u30c6\u30fc\u30c8 \u30de\u30b7\u30f3 \u30af\u30e9\u30b9\u3092\u64cd\u4f5c\u3059\u308b\u3068\u304d\u306b\u767a\u751f\u3059\u308b\u7af6\u5408\u3092\u300c\u89e3\u6c7a\u300d\u3059\u308b\u5fc5\u8981\u6027\u3092\u5fc3\u914d\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u30c1\u30fc\u30e0\u5185\u3067\u4f5c\u696d\u3092\u5171\u6709\u3057\u3001\u7279\u5b9a\u306e\u72b6\u614b\u306e\u5b9f\u88c5\u3092\u30c1\u30fc\u30e0 \u30e1\u30f3\u30d0\u30fc\u306b\u63d0\u4f9b\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u30bd\u30fc\u30b9<\/h3>\n
https:\/\/refactoring.guru\/ru\/design-patterns\/state <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30b9\u30c6\u30fc\u30c8 \u30de\u30b7\u30f3 (State Machine) \u306e\u4f7f\u7528\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u3001\u7c21\u5358\u306a\u5b9f\u88c5\u3001State \u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3057\u305f\u5b9f\u88c5\u3092\u793a\u3057\u307e\u3059\u3002\u72b6\u614b\u304c 3 \u3064\u672a\u6e80\u306e\u5834\u5408\u3001State \u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u306e\u306f\u671b\u307e\u3057\u304f\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306b\u3088\u308a\u901a\u5e38\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u4e0d\u5fc5\u8981\u306b\u8907\u96d1\u306b\u306a\u308a\u3001\u95a2\u9023\u3059\u308b\u30b5\u30dd\u30fc\u30c8\u306e\u554f\u984c\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u3059\u3079\u3066\u306f\u9069\u5ea6\u306b\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 MEAACT PHOTO \/ STUART PRICE. 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\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u518d\u751f\u3092\u5236\u5fa1\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u306e\u72b6\u6cc1\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b isSafetyVideoPlaying \u30d5\u30e9\u30b0\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046 \u3002\u307e\u305f\u3001\u30b7\u30b9\u30c6\u30e0\u306f\u73fe\u5728\u306e\u30d3\u30c7\u30aa\u3092\u4e00\u6642\u505c\u6b62\u3057\u3001\u30d7\u30ec\u30fc\u30e4\u30fc\u3092\u901a\u3058\u3066\u8239\u9577\u3068\u4e57\u7d44\u54e1\u304b\u3089\u306e\u8b66\u544a\u3092\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3067\u304d\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u5225\u306e is NoticePlaying \u30d5\u30e9\u30b0\u3092\u8ffd\u52a0\u3057\u307e\u3057\u3087\u3046\u3002\u3055\u3089\u306b\u3001\u30d7\u30ec\u30fc\u30e4\u30fc\u306e\u64cd\u4f5c\u306b\u95a2\u3059\u308b\u30d8\u30eb\u30d7\u3092\u8868\u793a\u3057\u3066\u3044\u308b\u9593\u306f\u518d\u751f\u3092\u4e00\u6642\u505c\u6b62\u3057\u306a\u3044\u3068\u3044\u3046\u8981\u4ef6\u304c\u3042\u308a\u307e\u3059\u3002\u5225\u306e\u30d5\u30e9\u30b0\u306fHelpPresenting\u3067\u3059\u3002 \u30e1\u30c7\u30a3\u30a2 \u30d7\u30ec\u30fc\u30e4\u30fc\u306e\u7591\u4f3c\u30b3\u30fc\u30c9\u306e\u4f8b: class MediaPlayer { public var isHelpPresenting = false public var isCaching = false public var isMediaPlaying: Bool = false public var isAnnouncementPlaying = falseContinue reading 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