{"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\/zh\/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":"\u72b6\u6001\u673a\u548c\u6a21\u5f0f\u6761\u4ef6"},"content":{"rendered":"<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u6211\u5c06\u63cf\u8ff0\u72b6\u6001\u673a\uff08State Machine\uff09\u7684\u4f7f\u7528\uff0c\u5c55\u793a\u4e00\u4e2a\u7b80\u5355\u7684\u5b9e\u73b0\uff0c\u4e00\u4e2a\u4f7f\u7528State\u6a21\u5f0f\u7684\u5b9e\u73b0\u3002\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u5982\u679c\u72b6\u6001\u5c11\u4e8e\u4e09\u4e2a\uff0c\u5219\u4e0d\u5b9c\u4f7f\u7528 State \u6a21\u5f0f\uff0c\u56e0\u4e3a\u8fd9\u901a\u5e38\u4f1a\u5bfc\u81f4\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u76f8\u5173\u652f\u6301\u95ee\u9898\u4e0d\u5fc5\u8981\u7684\u590d\u6742\u6027\u2014\u2014\u51e1\u4e8b\u90fd\u8981\u6709\u4e2a\u5ea6\u3002<\/p>\n<figure id=\"attachment_2088\" aria-describedby=\"caption-attachment-2088\" style=\"width: 510px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2088\" src=\"https:\/\/demensdeum.com\/blog\/wp-content\/uploads\/2019\/06\/flags.jpg\" alt=\"\" width=\"510\" height=\"190\" \/><figcaption id=\"caption-attachment-2088\" class=\"wp-caption-text\">MEAACT PHOTO \/ STUART PRICE.<\/figcaption><\/figure>\n<h3>\u65d7\u5e1c\u4e4b\u738b<\/h3>\n<p>\u5047\u8bbe\u6211\u4eec\u6b63\u5728\u4e3a\u6c11\u7528\u98de\u673a\u7684\u5a92\u4f53\u7cfb\u7edf\u5f00\u53d1\u89c6\u9891\u64ad\u653e\u5668\u5c4f\u5e55\uff0c\u64ad\u653e\u5668\u5fc5\u987b\u80fd\u591f\u52a0\u8f7d\u89c6\u9891\u6d41\u3001\u64ad\u653e\u89c6\u9891\u3001\u5141\u8bb8\u7528\u6237\u505c\u6b62\u4e0b\u8f7d\u8fc7\u7a0b\u3001\u5012\u5e26\u4ee5\u53ca\u6267\u884c\u5176\u4ed6\u901a\u5e38\u7684\u64cd\u4f5c\u4e00\u540d\u73a9\u5bb6\u3002<br \/>\u5047\u8bbe\u64ad\u653e\u5668\u7f13\u5b58\u4e86\u89c6\u9891\u6d41\u7684\u4e0b\u4e00\u4e2a\u5757\uff0c\u68c0\u67e5\u662f\u5426\u6709\u8db3\u591f\u7684\u5757\u7528\u4e8e\u64ad\u653e\uff0c\u5f00\u59cb\u5411\u7528\u6237\u64ad\u653e\u7247\u6bb5\uff0c\u540c\u65f6\u7ee7\u7eed\u4e0b\u8f7d\u4e0b\u4e00\u4e2a\u3002<br \/>\u6b64\u65f6\uff0c\u7528\u6237\u5feb\u9000\u5230\u89c6\u9891\u7684\u4e2d\u95f4\uff0c\u5373\u73b0\u5728\u9700\u8981\u505c\u6b62\u64ad\u653e\u5f53\u524d\u7247\u6bb5\u5e76\u4ece\u65b0\u4f4d\u7f6e\u5f00\u59cb\u52a0\u8f7d\u3002\u7136\u800c\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u8fd9\u662f\u65e0\u6cd5\u505a\u5230\u7684\u2014\u2014\u7528\u6237\u5728\u89c2\u770b\u6709\u5173\u822a\u7a7a\u5b89\u5168\u7684\u89c6\u9891\u65f6\u65e0\u6cd5\u63a7\u5236\u89c6\u9891\u6d41\u7684\u64ad\u653e\u3002\u8ba9\u6211\u4eec\u68c0\u67e5 isSafetyVideoPlaying \u6807\u5fd7\u6765\u68c0\u67e5\u8fd9\u79cd\u60c5\u51b5\u3002<br \/>\u7cfb\u7edf\u8fd8\u5fc5\u987b\u80fd\u591f\u6682\u505c\u5f53\u524d\u89c6\u9891\u5e76\u901a\u8fc7\u64ad\u653e\u5668\u5e7f\u64ad\u8239\u957f\u548c\u8239\u5458\u7684\u8b66\u62a5\u3002\u8ba9\u6211\u4eec\u6dfb\u52a0\u53e6\u4e00\u4e2a isAnnouncementPlaying \u6807\u5fd7\u3002\u53e6\u5916\uff0c\u8981\u6c42\u5728\u663e\u793a\u6709\u5173\u4f7f\u7528\u64ad\u653e\u5668\u7684\u5e2e\u52a9\u65f6\u4e0d\u8981\u6682\u505c\u64ad\u653e\uff0c\u53e6\u4e00\u4e2a\u6807\u5fd7\u662fHelpPresenting\u3002<\/p>\n<p>\u5a92\u4f53\u64ad\u653e\u5668\u793a\u4f8b\u4f2a\u4ee3\u7801\uff1a<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-unknown\" data-lang=\"unknown\"><code>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<p>\u7531\u4e8e\u9ad8\u53ef\u53d8\u6027\uff08\u71b5\uff09\uff0c\u4e0a\u9762\u7684\u793a\u4f8b\u96be\u4ee5\u9605\u8bfb\u4e14\u96be\u4ee5\u7ef4\u62a4\u3002\u6b64\u793a\u4f8b\u57fa\u4e8e\u6211\u4f7f\u7528\u4e0d\u4f7f\u7528\u72b6\u6001\u673a\u7684*\u8bb8\u591a*\u9879\u76ee\u7684\u4ee3\u7801\u5e93\u7684\u7ecf\u9a8c\u3002<br \/ >\u6bcf\u4e2a\u590d\u9009\u6846\u5fc5\u987b\u4e13\u95e8\u201c\u63a7\u5236\u201d\u5e94\u7528\u7a0b\u5e8f\u7684\u754c\u9762\u5143\u7d20\u548c\u4e1a\u52a1\u903b\u8f91\uff1b\u6dfb\u52a0\u53e6\u4e00\u4e2a\u590d\u9009\u6846\u7684\u5f00\u53d1\u4eba\u5458\u5fc5\u987b\u80fd\u591f\u5904\u7406\u5b83\u4eec\uff0c\u4f7f\u7528\u6240\u6709\u53ef\u80fd\u7684\u9009\u9879\u591a\u6b21\u68c0\u67e5\u548c\u91cd\u65b0\u68c0\u67e5\u6240\u6709\u5185\u5bb9\u3002<br \/>\u4ee3\u5165\u516c\u5f0f\u201c2 ^ \u590d\u9009\u6846\u6570\u91cf\u201d\uff0c\u53ea\u9700 6 \u4e2a\u590d\u9009\u6846\u5373\u53ef\u83b7\u5f97 2 ^ 6 = 64 \u4e2a\u5e94\u7528\u7a0b\u5e8f\u884c\u4e3a\u9009\u9879\uff0c\u6240\u6709\u8fd9\u4e9b\u590d\u9009\u6846\u7ec4\u5408\u90fd\u9700\u8981\u624b\u52a8\u68c0\u67e5\u548c\u7ef4\u62a4\u3002<br \/>\u4ece\u5f00\u53d1\u4eba\u5458\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u4f7f\u7528\u8fd9\u6837\u7684\u7cfb\u7edf\u6dfb\u52a0\u65b0\u529f\u80fd\u5982\u4e0b\u6240\u793a\uff1a<br \/>&#8211;\u6211\u4eec\u9700\u8981\u6dfb\u52a0\u663e\u793a\u822a\u7a7a\u516c\u53f8\u6d4f\u89c8\u5668\u9875\u9762\u7684\u529f\u80fd\uff0c\u5e76\u4e14\u5982\u679c\u673a\u7ec4\u4eba\u5458\u5ba3\u5e03\u67d0\u4e9b\u5185\u5bb9\uff0c\u5b83\u5e94\u8be5\u50cf\u7535\u5f71\u4e00\u6837\u6700\u5c0f\u5316\u3002<br \/>&#8211;\u597d\u7684\uff0c\u6211\u4f1a\u505a\u7684\u3002 \uff08\u54e6\u8be5\u6b7b\uff0c\u6211\u5fc5\u987b\u6dfb\u52a0\u53e6\u4e00\u4e2a\u6807\u5fd7\u5e76\u4ed4\u7ec6\u68c0\u67e5\u6807\u5fd7\u76f8\u4ea4\u7684\u6240\u6709\u4f4d\u7f6e\uff0c\u6709\u5f88\u591a\u4e1c\u897f\u9700\u8981\u66f4\u6539\uff01\uff09<\/p>\n<p>\u8fd9\u4e5f\u662f\u6807\u5fd7\u7cfb\u7edf\u7684\u4e00\u4e2a\u5f31\u70b9&#8211;\u66f4\u6539\u5e94\u7528\u7a0b\u5e8f\u7684\u884c\u4e3a\u3002\u5f88\u96be\u60f3\u8c61\u5982\u4f55\u5feb\u901f\/\u7075\u6d3b\u5730\u57fa\u4e8e\u6807\u5fd7\u66f4\u6539\u884c\u4e3a\uff0c\u5982\u679c\u53ea\u66f4\u6539\u4e00\u4e2a\u6807\u5fd7\u540e\u60a8\u5fc5\u987b\u4ed4\u7ec6\u68c0\u67e5\u6240\u6709\u5185\u5bb9\u3002\u8fd9\u79cd\u5f00\u53d1\u65b9\u6cd5\u4f1a\u5bfc\u81f4\u5f88\u591a\u95ee\u9898\u3001\u65f6\u95f4\u548c\u91d1\u94b1\u7684\u635f\u5931\u3002<\/p>\n<h3>\u8fdb\u5165\u673a\u5668<\/h3>\n<p>\u5982\u679c\u60a8\u4ed4\u7ec6\u67e5\u770b\u8fd9\u4e9b\u6807\u5fd7\uff0c\u60a8\u5c31\u4f1a\u660e\u767d\uff0c\u5b9e\u9645\u4e0a\u6211\u4eec\u6b63\u5728\u5c1d\u8bd5\u5904\u7406\u73b0\u5b9e\u4e16\u754c\u4e2d\u53d1\u751f\u7684\u7279\u5b9a\u8fdb\u7a0b\u3002\u6211\u4eec\u5217\u51fa\u4e86\u5b83\u4eec\uff1a\u6b63\u5e38\u6a21\u5f0f\u3001\u663e\u793a\u5b89\u5168\u89c6\u9891\u3001\u5e7f\u64ad\u8239\u957f\u6216\u8239\u5458\u7684\u6d88\u606f\u3002\u5bf9\u4e8e\u6bcf\u4e2a\u8fdb\u7a0b\uff0c\u4e00\u7ec4\u5df2\u77e5\u7684\u89c4\u5219\u4f1a\u6539\u53d8\u5e94\u7528\u7a0b\u5e8f\u7684\u884c\u4e3a\u3002<br \/>\u6839\u636e\u72b6\u6001\u673a\uff08state machine\uff09\u6a21\u5f0f\u7684\u89c4\u5219\uff0c\u6211\u4eec\u5c06\u6240\u6709\u8fdb\u7a0b\u5217\u4e3a\u679a\u4e3e\u4e2d\u7684\u72b6\u6001\uff0c\u5c06\u72b6\u6001\u8fd9\u6837\u7684\u6982\u5ff5\u6dfb\u52a0\u5230\u64ad\u653e\u5668\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7\u5220\u9664\u6807\u5fd7\u4e0a\u7684\u7ec4\u5408\u6765\u5b9e\u73b0\u57fa\u4e8e\u72b6\u6001\u7684\u884c\u4e3a\u3002\u8fd9\u6837\u6211\u4eec\u5c31\u53ef\u4ee5\u5c06\u6d4b\u8bd5\u7684\u9009\u9879\u51cf\u5c11\u5230\u7cbe\u786e\u7684\u72b6\u6001\u6570\u91cf\u3002<\/p>\n<p>\u4f2a\u4ee3\u7801\uff1a<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-unknown\" data-lang=\"unknown\"><code>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<p>\u6807\u5fd7\u7cfb\u7edf\u548c\u72b6\u6001\u673a\u7684\u5de8\u5927\u533a\u522b\u5728\u4e8e set(state: ..) \u65b9\u6cd5\u4e2d\u7684\u903b\u8f91\u72b6\u6001\u5207\u6362\u6f0f\u6597\uff0c\u5b83\u5141\u8bb8\u4f60\u5c06\u4eba\u7c7b\u5bf9\u72b6\u6001\u7684\u7406\u89e3\u8f6c\u5316\u4e3a\u7a0b\u5e8f\u4ee3\u7801\uff0c\u800c\u65e0\u9700\u73a9\u903b\u8f91\u5f53\u8fdb\u4e00\u6b65\u7684\u4ee3\u7801\u652f\u6301\u65f6\u5c06\u6807\u5fd7\u8f6c\u6362\u4e3a\u72b6\u6001\u7684\u6e38\u620f\u3002<\/p>\n<h3>\u6a21\u5f0f\u72b6\u6001<\/h3>\n<p>\u63a5\u4e0b\u6765\u6211\u5c06\u5c55\u793a\u72b6\u6001\u673a\u7684\u7b80\u5355\u5b9e\u73b0\u548c\u72b6\u6001\u6a21\u5f0f\u4e4b\u95f4\u7684\u533a\u522b\u3002\u5047\u8bbe\u6211\u4eec\u9700\u8981\u6dfb\u52a0 10 \u4e2a\u72b6\u6001\uff1b\u7ed3\u679c\uff0c\u72b6\u6001\u673a\u7c7b\u5c06\u589e\u957f\u5230\u4e00\u4e2a godobject \u7684\u5927\u5c0f\uff0c\u8fd9\u5c06\u53d8\u5f97\u96be\u4ee5\u7ef4\u62a4\u4e14\u6210\u672c\u9ad8\u6602\u3002\u5f53\u7136\uff0c\u8fd9\u4e2a\u5b9e\u73b0\u6bd4flag\u5b9e\u73b0\u8981\u597d\uff08\u4f7f\u7528flag\u7cfb\u7edf\uff0c\u5f00\u53d1\u8005\u4f1a\u5148\u5f00\u67aa\u81ea\u6740\uff0c\u5982\u679c\u6ca1\u6709\uff0c\u90a3\u4e48\u770b\u52302^10=1024\u4e2a\u53d8\u4f53\uff0cQA\u5c31\u4f1a\u6302\u6389\u81ea\u5df1\uff0c\u4f46\u5982\u679c\u4ed6\u4eec\u90fd*\u4e0d\u6ce8\u610f*\u4efb\u52a1\u7684\u590d\u6742\u6027\uff0c\u90a3\u4e48\u5e94\u7528\u7a0b\u5e8f\u7b80\u5355\u7684\u7528\u6237\u4f1a\u6ce8\u610f\u5230\u5b83\u5c06\u62d2\u7edd\u4f7f\u7528\u7279\u5b9a\u7684\u6807\u5fd7\u7ec4\u5408\uff09<br \/>\u5982\u679c\u72b6\u6001\u6570\u91cf\u8f83\u591a\uff0c\u5c31\u9700\u8981\u4f7f\u7528State\u6a21\u5f0f\u3002<br \/>\u8ba9\u6211\u4eec\u5411\u72b6\u6001\u534f\u8bae\u6dfb\u52a0\u4e00\u7ec4\u89c4\u5219\uff1a<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-unknown\" data-lang=\"unknown\"><code>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<p>\u8ba9\u6211\u4eec\u5c06\u4e00\u7ec4\u89c4\u5219\u7684\u5b9e\u73b0\u79fb\u81f3\u5355\u72ec\u7684\u72b6\u6001\uff0c\u4f8b\u5982\u4e00\u4e2a\u72b6\u6001\u7684\u4ee3\u7801\uff1a<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-unknown\" data-lang=\"unknown\"><code>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<p>\u63a5\u4e0b\u6765\uff0c\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u6bcf\u4e2a\u72b6\u6001\u90fd\u53ef\u4ee5\u5de5\u4f5c\u7684\u4e0a\u4e0b\u6587\uff0c\u5e76\u96c6\u6210\u72b6\u6001\u673a\uff1a<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-unknown\" data-lang=\"unknown\"><code>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<p>\u5e94\u7528\u7a0b\u5e8f\u7ec4\u4ef6\u901a\u8fc7\u516c\u5171\u65b9\u6cd5\u4e0e\u4e0a\u4e0b\u6587\u4e00\u8d77\u5de5\u4f5c\uff1b\u72b6\u6001\u5bf9\u8c61\u672c\u8eab\u51b3\u5b9a\u4f7f\u7528\u4e0a\u4e0b\u6587\u5185\u7684\u72b6\u6001\u673a\u4ece\u54ea\u4e2a\u72b6\u6001\u8f6c\u6362\u5230\u54ea\u4e2a\u72b6\u6001\u3002<br \/>\u56e0\u6b64\uff0c\u6211\u4eec\u5b9e\u73b0\u4e86\u4e0a\u5e1d\u5bf9\u8c61\u5206\u89e3\uff0c\u7ef4\u62a4\u53d8\u5316\u7684\u72b6\u6001\u4f1a\u5bb9\u6613\u5f97\u591a\uff0c\u8fd9\u5f97\u76ca\u4e8e\u7f16\u8bd1\u5668\u8ddf\u8e2a\u534f\u8bae\u7684\u53d8\u5316\uff0c\u7531\u4e8e\u4ee3\u7801\u884c\u6570\u7684\u51cf\u5c11\u800c\u964d\u4f4e\u4e86\u7406\u89e3\u72b6\u6001\u7684\u590d\u6742\u5ea6\uff0c\u5e76\u4e14\u4e13\u6ce8\u4e8e\u89e3\u51b3\u7279\u5b9a\u7684\u72b6\u6001\u95ee\u9898\u3002\u60a8\u73b0\u5728\u8fd8\u53ef\u4ee5\u5728\u56e2\u961f\u4e2d\u5171\u4eab\u5de5\u4f5c\uff0c\u4e3a\u56e2\u961f\u6210\u5458\u63d0\u4f9b\u7279\u5b9a\u72b6\u6001\u7684\u5b9e\u73b0\uff0c\u800c\u4e0d\u5fc5\u62c5\u5fc3\u9700\u8981\u201c\u89e3\u51b3\u201d\u51b2\u7a81\uff0c\u8fd9\u79cd\u60c5\u51b5\u5728\u4f7f\u7528\u4e00\u4e2a\u5927\u578b\u72b6\u6001\u673a\u7c7b\u65f6\u4f1a\u53d1\u751f\u3002<\/p>\n<h3>\u6765\u6e90<\/h3>\n<p><a href=\"https:\/\/refactoring.guru\/ru\/design-patterns\/state\" target=\"_blank\" rel=\"noopener\">https:\/\/refactoring.guru\/ru\/design-patterns\/state <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u6211\u5c06\u63cf\u8ff0\u72b6\u6001\u673a\uff08State Machine\uff09\u7684\u4f7f\u7528\uff0c\u5c55\u793a\u4e00\u4e2a\u7b80\u5355\u7684\u5b9e\u73b0\uff0c\u4e00\u4e2a\u4f7f\u7528State\u6a21\u5f0f\u7684\u5b9e\u73b0\u3002\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u5982\u679c\u72b6\u6001\u5c11\u4e8e\u4e09\u4e2a\uff0c\u5219\u4e0d\u5b9c\u4f7f\u7528 State \u6a21\u5f0f\uff0c\u56e0\u4e3a\u8fd9\u901a\u5e38\u4f1a\u5bfc\u81f4\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u76f8\u5173\u652f\u6301\u95ee\u9898\u4e0d\u5fc5\u8981\u7684\u590d\u6742\u6027\u2014\u2014\u51e1\u4e8b\u90fd\u8981\u6709\u4e2a\u5ea6\u3002 MEAACT PHOTO \/ STUART PRICE. \u65d7\u5e1c\u4e4b\u738b \u5047\u8bbe\u6211\u4eec\u6b63\u5728\u4e3a\u6c11\u7528\u98de\u673a\u7684\u5a92\u4f53\u7cfb\u7edf\u5f00\u53d1\u89c6\u9891\u64ad\u653e\u5668\u5c4f\u5e55\uff0c\u64ad\u653e\u5668\u5fc5\u987b\u80fd\u591f\u52a0\u8f7d\u89c6\u9891\u6d41\u3001\u64ad\u653e\u89c6\u9891\u3001\u5141\u8bb8\u7528\u6237\u505c\u6b62\u4e0b\u8f7d\u8fc7\u7a0b\u3001\u5012\u5e26\u4ee5\u53ca\u6267\u884c\u5176\u4ed6\u901a\u5e38\u7684\u64cd\u4f5c\u4e00\u540d\u73a9\u5bb6\u3002\u5047\u8bbe\u64ad\u653e\u5668\u7f13\u5b58\u4e86\u89c6\u9891\u6d41\u7684\u4e0b\u4e00\u4e2a\u5757\uff0c\u68c0\u67e5\u662f\u5426\u6709\u8db3\u591f\u7684\u5757\u7528\u4e8e\u64ad\u653e\uff0c\u5f00\u59cb\u5411\u7528\u6237\u64ad\u653e\u7247\u6bb5\uff0c\u540c\u65f6\u7ee7\u7eed\u4e0b\u8f7d\u4e0b\u4e00\u4e2a\u3002\u6b64\u65f6\uff0c\u7528\u6237\u5feb\u9000\u5230\u89c6\u9891\u7684\u4e2d\u95f4\uff0c\u5373\u73b0\u5728\u9700\u8981\u505c\u6b62\u64ad\u653e\u5f53\u524d\u7247\u6bb5\u5e76\u4ece\u65b0\u4f4d\u7f6e\u5f00\u59cb\u52a0\u8f7d\u3002\u7136\u800c\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u8fd9\u662f\u65e0\u6cd5\u505a\u5230\u7684\u2014\u2014\u7528\u6237\u5728\u89c2\u770b\u6709\u5173\u822a\u7a7a\u5b89\u5168\u7684\u89c6\u9891\u65f6\u65e0\u6cd5\u63a7\u5236\u89c6\u9891\u6d41\u7684\u64ad\u653e\u3002\u8ba9\u6211\u4eec\u68c0\u67e5 isSafetyVideoPlaying \u6807\u5fd7\u6765\u68c0\u67e5\u8fd9\u79cd\u60c5\u51b5\u3002\u7cfb\u7edf\u8fd8\u5fc5\u987b\u80fd\u591f\u6682\u505c\u5f53\u524d\u89c6\u9891\u5e76\u901a\u8fc7\u64ad\u653e\u5668\u5e7f\u64ad\u8239\u957f\u548c\u8239\u5458\u7684\u8b66\u62a5\u3002\u8ba9\u6211\u4eec\u6dfb\u52a0\u53e6\u4e00\u4e2a isAnnouncementPlaying \u6807\u5fd7\u3002\u53e6\u5916\uff0c\u8981\u6c42\u5728\u663e\u793a\u6709\u5173\u4f7f\u7528\u64ad\u653e\u5668\u7684\u5e2e\u52a9\u65f6\u4e0d\u8981\u6682\u505c\u64ad\u653e\uff0c\u53e6\u4e00\u4e2a\u6807\u5fd7\u662fHelpPresenting\u3002 \u5a92\u4f53\u64ad\u653e\u5668\u793a\u4f8b\u4f2a\u4ee3\u7801\uff1a class MediaPlayer { public var isHelpPresenting = false public var isCaching = false public var isMediaPlaying: Bool = false public var isAnnouncementPlaying = false public var isSafetyVideoPlaying = false public var currentMedia: Media = null fun play(media: Media) {<a class=\"more-link\" href=\"https:\/\/demensdeum.com\/blog\/zh\/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\/\">Continue reading <span class=\"screen-reader-text\">&#8220;\u72b6\u6001\u673a\u548c\u6a21\u5f0f\u6761\u4ef6&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[61,52],"tags":[95,109],"class_list":["post-2087","post","type-post","status-publish","format-standard","hentry","category-techie","category-tutorials","tag-patterns","tag-state","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"zh","enabled_languages":["en","ru","zh","de","fr","ja","pt","hi"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"ru":{"title":true,"content":true,"excerpt":false},"zh":{"title":true,"content":true,"excerpt":false},"de":{"title":true,"content":true,"excerpt":false},"fr":{"title":true,"content":true,"excerpt":false},"ja":{"title":true,"content":true,"excerpt":false},"pt":{"title":true,"content":true,"excerpt":false},"hi":{"title":false,"content":false,"excerpt":false}}},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts\/2087","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/comments?post=2087"}],"version-history":[{"count":14,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts\/2087\/revisions"}],"predecessor-version":[{"id":3952,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts\/2087\/revisions\/3952"}],"wp:attachment":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/media?parent=2087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/categories?post=2087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/tags?post=2087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}