{"id":2605,"date":"2023-04-04T00:26:55","date_gmt":"2023-04-03T16:26:55","guid":{"rendered":"https:\/\/lonelinerd.com\/?p=2605"},"modified":"2023-04-05T22:25:26","modified_gmt":"2023-04-05T14:25:26","slug":"design-pattern-observer-pattern","status":"publish","type":"post","link":"https:\/\/lonelinerd.com\/index.php\/2023\/04\/04\/design-pattern-observer-pattern\/","title":{"rendered":"\u8a2d\u8a08\u6a21\u5f0f\u7b46\u8a18 &#8211; \u89c0\u5bdf\u8005\u6a21\u5f0f"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2605\" class=\"elementor elementor-2605\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-af75c0a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"af75c0a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-949bf81\" data-id=\"949bf81\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9a39c07 elementor-widget elementor-widget-text-editor\" data-id=\"9a39c07\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h4 class=\"md-end-block md-heading\"><span style=\"text-decoration: underline;\"><strong><span class=\"md-plain md-expand\">\u5206\u985e<\/span><\/strong><\/span><\/h4><ul><li>\u884c\u70ba\u578b<\/li><\/ul><h4 class=\"md-end-block md-heading\"><span style=\"text-decoration: underline;\"><strong><span class=\"md-plain md-expand\">\u6a21\u5f0f\u7684\u76ee\u7684\uff08\u5b9a\u7fa9\uff09<\/span><\/strong><\/span><\/h4><ul><li>n\u500b\u89c0\u5bdf\u8005\u5c0d\u8c61\u628a\u81ea\u8eab\u300c\u6ce8\u518a\u300d\u5230\u67d0\u500b\u5c0d\u8c61\u7684\u901a\u77e5\u5217\u8868\u4e2d\uff0c\u7576\u8a72\u5c0d\u8c61\u72c0\u614b\u6539\u8b8a\u6642\uff0c\u8a72\u5c0d\u8c61\u904d\u6b77\u9019\u500b\u5217\u8868\uff0c\u901a\u77e5\u6240\u6709\u7684\u89c0\u5bdf\u8005\u5c0d\u8c61<\/li><li>\u89c0\u5bdf\u8005\u5c0d\u8c61\u6536\u5230\u901a\u77e5\u5f8c\uff0c\u4fbf\u57f7\u884c\u76f8\u61c9\u7684\u884c\u52d5\uff0c\u5982\uff1a<ul><li>\u76f4\u63a5\u5f9e\u89c0\u5bdf\u5c0d\u8c61\u8eab\u4e0a\u7372\u53d6\u6578\u64da<\/li><li>\u6839\u64da\u5f9e\u901a\u77e5\u65b9\u6cd5\u4e2d\u50b3\u4f86\u7684\u53c3\u6578\u505a\u4e00\u4e9b\u4e8b\u60c5<\/li><li>\u5176\u4ed6\u884c\u70ba<\/li><\/ul><\/li><\/ul><h4 class=\"md-end-block md-heading\"><span style=\"text-decoration: underline;\"><strong><span class=\"md-plain md-expand\">\u4f7f\u7528\u5834\u666f\u4f8b\u5b50<\/span><\/strong><\/span><\/h4><ul><li>UI\u6578\u64da\u5237\u65b0\u662f\u89c0\u5bdf\u8005\u6a21\u5f0f\u5e38\u7528\u7684\u5834\u5408\u4e4b\u4e00\uff0c\u73fe\u5728\u6bd4\u5982\u6709\u4e00\u500b\u52d5\u4f5c\u904a\u6232\uff0cUI\u7684Overlay\u9762\u677f\u4e0a\u6709\u5404\u500b\u63a7\u4ef6\u7528\u65bc\u986f\u793a\u82f1\u96c4\u7684\u751f\u547d\/\u653b\u6483\u529b\/&#8230;\u8207\u904a\u6232\u5834\u666f\u4e2d\u7684\u82f1\u96c4\u5c0d\u8c61\u606f\u606f\u76f8\u95dc\u7684\u4fe1\u606f\uff1a<ul><li>UI\u63a7\u4ef6\u5728\u521d\u59cb\u5316\u6642\uff0c\u5c07\u81ea\u5df1\u6ce8\u518a\u5230\u82f1\u96c4\u5c0d\u8c61\u7684\u89c0\u5bdf\u8005\u5217\u8868\u4e2d<\/li><li>\u82f1\u96c4\u81ea\u8eab\u6578\u64da\u8b8a\u5316\u6642\uff0c\u5982\u88ab\u602a\u7269A\u4e86\u4e00\u4e0b\uff0c\u751f\u547d\u6e1b\u5c11\u4e8610\u9ede\uff0c\u82f1\u96c4\u5c31\u540c\u6642\u904d\u6b77\u6574\u500b\u89c0\u5bdf\u8005\u5217\u8868\uff0c\u901a\u77e5\u6240\u6709\u89c0\u5bdf\u8005\u81ea\u5df1\u7684\u5c6c\u6027\u5df2\u767c\u751f\u8b8a\u5316<ul><li>\u9019\u88e1\u65e2\u53ef\u4ee5\u76f4\u63a5\u628a\u8b8a\u5316\u503c\u4f5c\u70ba\u901a\u77e5\u7684\u53c3\u6578\u50b3\u7d66\u89c0\u5bdf\u8005<\/li><li>\u4e5f\u53ef\u4ee5\u53ea\u8ca0\u8cac\u300c\u901a\u77e5\u300d\uff0c\u5177\u9ad4\u53d6\u503c\u7531\u89c0\u5bdf\u8005\u901a\u904e\u82f1\u96c4\u5c0d\u8c61\u63d0\u4f9b\u7684\u5c6c\u6027getter\u7372\u53d6<\/li><\/ul><\/li><li>\u9019\u88e1\u4e00\u500b\u512a\u5316\u9ede\u662f\u589e\u52a0\u300c\u884c\u70ba\u985e\u578b\u300d<ul><li>\u89c0\u5bdf\u8005\u6ce8\u518a\u6642\uff0c\u8a18\u9304\u89c0\u5bdf\u8005\u95dc\u6ce8\u7684\u300c\u884c\u70ba\u985e\u578b\u300d<ul><li>Dictionary&lt;EventType, List&lt;IObserver&gt; observers&gt; eventObserversDict;<\/li><\/ul><\/li><li>\u7136\u5f8c\u5c6c\u6027\u8b8a\u5316\u6642\uff0c\u5c31\u53ef\u4ee5\u53ea\u901a\u77e5\u95dc\u6ce8\u4e86\u67d0\u500b\u300c\u884c\u70ba\u985e\u578b\u300d\u7684\u89c0\u5bdf\u8005\u5011<ul><li>foreach observers in eventObserversDict[EventType.HealthUpdate]<\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><h4 class=\"md-end-block md-heading\"><span style=\"text-decoration: underline;\"><strong><span class=\"md-plain md-expand\">\u985e\u5716<\/span><\/strong><\/span><\/h4>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a6941d5 elementor-widget elementor-widget-image\" data-id=\"a6941d5\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"975\" height=\"659\" src=\"https:\/\/lonelinerd.com\/wp-content\/uploads\/2023\/04\/C6U0IW5V_I9AHP86TB.png\" class=\"attachment-large size-large wp-image-2677\" alt=\"\" srcset=\"https:\/\/lonelinerd.com\/wp-content\/uploads\/2023\/04\/C6U0IW5V_I9AHP86TB.png 975w, https:\/\/lonelinerd.com\/wp-content\/uploads\/2023\/04\/C6U0IW5V_I9AHP86TB-300x203.png 300w, https:\/\/lonelinerd.com\/wp-content\/uploads\/2023\/04\/C6U0IW5V_I9AHP86TB-768x519.png 768w\" sizes=\"auto, (max-width: 975px) 100vw, 975px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d5af49d elementor-widget elementor-widget-text-editor\" data-id=\"d5af49d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-f4d3d56 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"f4d3d56\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d4fe205\" data-id=\"d4fe205\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d3793fe elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"d3793fe\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b2c01f6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b2c01f6\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c6e5954\" data-id=\"c6e5954\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-14030c2 elementor-widget elementor-widget-text-editor\" data-id=\"14030c2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<h4 class=\"md-end-block md-heading\"><span style=\"text-decoration: underline;\"><strong><span class=\"md-plain md-expand\">\u53c3\u8003\u66f8\u76ee<\/span><\/strong><\/span><\/h4><ul class=\"ul-list\" data-mark=\"-\"><li class=\"md-list-item md-focus-container\">\u300aHead First Design Patterns\u300bEric Freeman, Elisabeth Robson, Kathy Sierra, Bert Bates<\/li><\/ul>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>n\u500b\u89c0\u5bdf\u8005\u5c0d\u8c61\u628a\u81ea\u8eab\u300c\u6ce8\u518a\u300d\u5230\u67d0\u500b\u5c0d\u8c61\u7684\u901a\u77e5\u5217\u8868\u4e2d\uff0c\u7576\u8a72\u5c0d\u8c61\u72c0\u614b\u6539\u8b8a\u6642\uff0c\u8a72\u5c0d\u8c61\u904d\u6b77\u9019\u500b\u5217\u8868\uff0c\u901a\u77e5\u6240\u6709\u7684\u89c0\u5bdf\u8005\u5c0d\u8c61<\/p>\n","protected":false},"author":1,"featured_media":947,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,26,18],"tags":[],"class_list":["post-2605","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-reading-notes","category-design-patterns","category-developing"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/lonelinerd.com\/wp-content\/uploads\/2021\/03\/FeatureCover_ReadingNotes.png","_links":{"self":[{"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts\/2605","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/comments?post=2605"}],"version-history":[{"count":8,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts\/2605\/revisions"}],"predecessor-version":[{"id":2684,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/posts\/2605\/revisions\/2684"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/media\/947"}],"wp:attachment":[{"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/media?parent=2605"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/categories?post=2605"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lonelinerd.com\/index.php\/wp-json\/wp\/v2\/tags?post=2605"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}