{"id":172,"date":"2020-04-11T15:58:21","date_gmt":"2020-04-11T06:58:21","guid":{"rendered":"https:\/\/blog.daymore.com\/?p=172"},"modified":"2020-04-11T16:07:17","modified_gmt":"2020-04-11T07:07:17","slug":"swift-initializer","status":"publish","type":"post","link":"https:\/\/blog.daymore.com\/?p=172","title":{"rendered":"swift initializer"},"content":{"rendered":"\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/Swift\n\/\/\ubd80\ubaa8\uc758 \uc0dd\uc131\uc790\ub294 \uc790\uc2dd\uc5d0\uac8c \ubaa8\ub450 \uc0c1\uc18d\ub418\uc9c0 \uc54a\ub294 \uac83\uc744 \uc6d0\uce59\uc73c\ub85c \ud568\nclass Super {\n    var text: String\n    var extend: String\n    var only: String\n    \n    init() {\n        self.text = \"\"\n        self.extend = \"\"\n        self.only = \"\"\n    }\n    \n    init(text: String) {\n        self.text = text\n        self.extend = \"\"\n        self.only = \"\"\n    }\n    \n    \/\/required \uc0dd\uc131\uc790\ub294 \uc0c1\uc18d\ubc1b\uc740 \uc790\uc2dd\uc5d0\uc11c \ubc18\ub4dc\uc2dc \ub2e4\uc2dc \uad6c\ud604\ud574\uc57c \ud568\n    required init?(extend: String) {\n        print(\"init with super extend\")\n        self.text = \"\"\n        self.extend = extend\n        self.only = \"\"\n    }\n    \n    \/\/convenience \uc0dd\uc131\uc790\ub294 \ub2e4\ub978 \uc0dd\uc131\uc790 \ud638\ucd9c\uc744 \ub3c4\uc640\uc90c\n    \/\/convenience \uc0dd\uc131\uc790\ub294 \ubc18\ub4dc\uc2dc \ub2e4\ub978 \uc0dd\uc131\uc790\ub97c \ud638\ucd9c\ud574\uc57c \ud568\n    convenience init?(only: String) {\n        print(\"init with only\")\n        self.init(text: \"\")\n        self.only = only\n    }\n    \n    deinit {\n    }\n}\n\nclass Sub1: Super {\n    var content: String = \"\"\n    \/\/\uc7ac\uc815\uc758\ud55c \uc0dd\uc131\uc790\uac00 \ud558\ub098\ub3c4 \uc5c6\uc73c\uba74 \ubd80\ubaa8\uc758 \ubaa8\ub4e0 \uc0dd\uc131\uc790 \uc0c1\uc18d \ubc1b\uc74c\n}\n\nclass Sub2: Super {\n    var content: String\n\n    override init(text: String) {\n        content = \"\"\n        super.init(text: text)\n    }\n    \n    \/\/\ubd80\ubaa8\uc758 required \uc0dd\uc131\uc790\ub294 \ubc18\ub4dc\uc2dc \uad6c\ud604\ud574\uc57c \ud568\n    required init?(extend: String) {\n        print(\"init with sub extend\")\n        content = \"\"\n        super.init(extend: extend)\n    }\n    \n    \/\/\ubd80\ubaa8\uc758 \ubaa8\ub4e0 designated \uc0dd\uc131\uc790\ub97c \uad6c\ud604\ud558\uba74 \ubd80\ubaa8\uc758 \ubaa8\ub4e0 convenience \uc0dd\uc131\uc790\ub97c \uc0c1\uc18d \ubc1b\uc74c\n    \/\/\uc9c0\uae08\uc740 \ubd80\ubaa8\uc758 init()\ub97c \uc7ac\uc815\uc758\ud558\uc9c0 \uc54a\uc558\uae30 \ub54c\ubb38\uc5d0 convenience \uc0dd\uc131\uc790\ub97c \uc0c1\uc18d \ubc1b\uc9c0 \uc54a\uc74c\n}<\/pre>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">_ = Sub1(only: \"only\")\n_ = Sub2(extend: \"extend\")\n_ = Sub2(only: \"only\")  \/\/error, Sub2\uc5d0\uc11c \ubd80\ubaa8\uc758 init()\ub97c \uc7ac\uc815\uc758\ud558\uba74 \ud638\ucd9c\uac00\ub2a5<\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\ub2e4\uc2dc \uc815\ub9ac\ud558\uba74&#8230;<br><br>\ubd80\ubaa8\uc758 \uc0dd\uc131\uc790\ub294 \uc790\uc2dd\uc5d0\uac8c \ubaa8\ub450 \uc0c1\uc18d\ub418\uc9c0 \uc54a\ub294 \uac83\uc744 \uc6d0\uce59\uc73c\ub85c \ud568<br>\ud558\uc9c0\ub9cc \ubd80\ubaa8\uc758 \uc0dd\uc131\uc790\uac00 \uc790\uc2dd\uc5d0\uac8c \uc0c1\uc18d\ub418\ub294 \uc6d0\uce59)<br>1. \uc790\uc2dd\uc5d0\uc11c \uc7ac\uc815\uc758\ud55c \uc0dd\uc131\uc790\uac00 \ud558\ub098\ub3c4 \uc5c6\uc73c\uba74 \ubd80\ubaa8\uc758 \ubaa8\ub4e0 \uc0dd\uc131\uc790\ub97c \uc790\ub3d9\uc73c\ub85c \uc0c1\uc18d \ubc1b\uc74c<br>2. \uc790\uc2dd\uc5d0\uc11c designated \uc0dd\uc0dd\uc790\ub97c \ubaa8\ub450 \uc7ac\uc815\uc758\ud558\uba74 \ubaa8\ub4e0 convenience \uc0dd\uc131\uc790\ub294 \uc0c1\uc18d \ubc1b\uc74c<br><br>designated : \uc77c\ubc18\uc801\uc73c\ub85c \uad6c\ud604\ud55c \uc0dd\uc131\uc790<br>required : \uc790\uc2dd\uc5d0\uc11c \ubc18\ub4dc\uc2dc \uad6c\ud604\ud574\uc57c \ud568, required \ud0a4\uc6cc\ub4dc\uac00 override \uc758\ubbf8\ub97c \ud3ec\ud568<br>convenience : \ub2e4\ub978 \uc0dd\uc131\uc790\uc758 \ud638\ucd9c\uc744 \uc27d\uac8c \ud558\uae30 \uc704\ud568, \ub0b4\ubd80\uc5d0\uc11c \ubc18\ub4dc\uc2dc \ub2e4\ub978 \uc0dd\uc131\uc790\ub97c \ud638\ucd9c\ud574\uc57c \ud568<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ub2e4\uc2dc \uc815\ub9ac\ud558\uba74&#8230; \ubd80\ubaa8\uc758 \uc0dd\uc131\uc790\ub294 \uc790\uc2dd\uc5d0\uac8c \ubaa8\ub450 \uc0c1\uc18d\ub418\uc9c0 \uc54a\ub294 \uac83\uc744 \uc6d0\uce59\uc73c\ub85c \ud568\ud558\uc9c0\ub9cc \ubd80\ubaa8\uc758 \uc0dd\uc131\uc790\uac00 \uc790\uc2dd\uc5d0\uac8c \uc0c1\uc18d\ub418\ub294 \uc6d0\uce59)1. \uc790\uc2dd\uc5d0\uc11c \uc7ac\uc815\uc758\ud55c \uc0dd\uc131\uc790\uac00 \ud558\ub098\ub3c4 \uc5c6\uc73c\uba74 \ubd80\ubaa8\uc758 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[50,46,44,47,17,49,45],"class_list":["post-172","post","type-post","status-publish","format-standard","hentry","category-swift","tag-convenience","tag-designated","tag-initializer","tag-required","tag-swift","tag-49","tag-45"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>swift initializer - \uae00\uc4f0\uae30, IT \uc791\uc740 \uc9c0\uc2dd<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.daymore.com\/?p=172\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"swift initializer - \uae00\uc4f0\uae30, IT \uc791\uc740 \uc9c0\uc2dd\" \/>\n<meta property=\"og:description\" content=\"\ub2e4\uc2dc \uc815\ub9ac\ud558\uba74&#8230; 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