{"id":5792,"date":"2026-05-29T11:07:00","date_gmt":"2026-05-29T02:07:00","guid":{"rendered":"https:\/\/www.freelifemakers.org\/wordpress\/?p=5792"},"modified":"2026-05-29T11:06:42","modified_gmt":"2026-05-29T02:06:42","slug":"swift-observedobject-and-stateobject-1","status":"publish","type":"post","link":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/2026\/05\/29\/swift-observedobject-and-stateobject-1\/","title":{"rendered":"[Swift]ObservedObject and StateObject – 1"},"content":{"rendered":"\n
\ud83d\udc49\ud83c\udffb \uc2a4\uc704\ud504\ud2b8\uc5d0\uc11c ObservedObject\uc640 StateObject\ub97c \uc0ac\uc6a9\ud558\ub294 \uac04\ub2e8\ud55c \ubc29\ubc95\uc785\ub2c8\ub2e4. This is a simple way to use ObservedObject and StateObject in Swift.<\/p>\n\n\n\n
\u2714\ufe0f @StateObject<\/code>\uc640\u00a0@ObservedObject<\/code>\ub294 \ub458\ub2e4 \ubdf0\uc5d0 \ubc14\uc778\ub529\ud558\ub294 \ubc29\ubc95\uc774\uc9c0\ub9cc, \ub458\uc740 \uc57d\uac04\uc758 \ucc28\uc774\uac00 \uc788\uc2b5\ub2c8\ub2e4. Both @StateObject and @ObservedObject are methods for binding to a view, but there are slight differences between the two.<\/p>\n\n\n\n
— \uc77c\ubc18\uc801\uc73c\ub85c \ubdf0\uc5d0\uc11c \uc9c1\uc811 \uc0c1\ud0dc \uac1d\uccb4\ub97c \uc0dd\uc131\ud558\uace0 \uad00\ub9ac\ud560 \ub54c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. It is generally used when creating and managing state objects directly in the view.<\/p>\n\n\n\n
— \ubdf0\uac00 \ucc98\uc74c \uc0dd\uc131\ub420 \ub54c\ub9cc \ud574\ub2f9 ObservableObject \uc778\uc2a4\ud134\uc2a4\ub97c \ucd08\uae30\ud654\ud558\uace0, \ubdf0\uac00 \ub2e4\uc2dc \ub80c\ub354\ub9c1\ub418\uac70\ub098 \uac31\uc2e0\ub420 \ub54c\ub294 \uae30\uc874 \uc778\uc2a4\ud134\uc2a4\ub97c \uc720\uc9c0\ud569\ub2c8\ub2e4. Initialize the ObservableObject instance only when the view is first created, and maintain the existing instance when the view is re-rendered or updated.<\/p>\n\n\n\n
— \ubdf0\uc5d0\uc11c \uc9c1\uc811 \uc0c1\ud0dc \uad00\ub9ac\ub97c \ud560\ub54c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. It is used when managing state directly in the view.<\/p>\n\n\n\n
— \uc544\ub798\uc758 \ucf54\ub4dc\uac00 \uc774 \ubd80\ubd84\uc5d0 \ud574\ub2f9\ud569\ub2c8\ub2e4. The code below corresponds to this part.<\/p>\n\n\n\n
— \uc678\ubd80\uc5d0\uc11c \uc774\ubbf8 \uc0dd\uc131\ub41c ObservableObject\ub97c \uc804\ub2ec\ubc1b\uc544 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. It receives and uses an ObservableObject that has already been created externally.<\/p>\n\n\n\n
— \ubdf0\uac00 \ub2e4\uc2dc \uc0dd\uc131\ub420 \ub54c\ub9c8\ub2e4 ObservableObject \uc778\uc2a4\ud134\uc2a4\uac00 \uacc4\uc18d \uc0c8\ub85c \uc0dd\uc131\ub418\ub294 \uacbd\uc6b0\uac00 \uc788\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. There may be cases where new ObservableObject instances are created every time the view is recreated.<\/p>\n\n\n\n
— \uadf8\ub798\uc11c \ubd80\ubaa8\ubdf0\ub97c \uc790\uc2dd\ubdf0\uc5d0 \uc804\ub2ec\ud560\ub54c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. So, it is used when passing a parent view to a child view.<\/p>\n\n\n\n
\nimport SwiftUI\nimport Combine\n\n\nclass UserSettings: ObservableObject {\n @Published var username = \"Anonymous\"\n}\n\nstruct ContentView: View {\n \n \/\/ @StateObject\ub294 SwiftUI\uc758 state storage(\ubdf0\uc758 \ub77c\uc774\ud504 \uc2f8\uc774\ud074 \ub3d9\uc548 \ubcf4\uad00\ub418\ub294 \uc800\uc7a5\uc18c)\uc5d0\n \/\/ \uc778\uc2a4\ud134\uc2a4\ub97c \uc800\uc7a5\ud558\uace0, \ucc98\uc74c \ubdf0\uac00 \uc0dd\uc131\ub420 \ub54c\ub9cc \ucd08\uae30\ud654\ud558\ub3c4\ub85d \ubcf4\uc7a5\ud569\ub2c8\ub2e4.\n \/\/ @StateObject stores an instance in SwiftUI's state storage (which is kept throughout the view's lifecycle) and ensures that it is initialized only when the view is first created.\n \n @StateObject var settings = UserSettings()\n \n \/\/ @ObservedObject\ub294 \uad6c\uc870\uccb4\uc758 \ucd08\uae30\ud654 \uc2dc\uc810\uc5d0 \uacc4\uc18d\ud574\uc11cUserSettings()\ub97c \ub2e4\uc2dc \uc2e4\ud589 \ud569\ub2c8\ub2e4.\n \/\/ @ObservedObject will continually re-run UserSettings() at the time of initialization of the struct.\n \n \/\/@ObservedObject var settings = UserSettings()\n \n var body: some View {\n VStack {\n Image(systemName: \"globe\")\n .imageScale(.large)\n \n .foregroundStyle(.tint)\n Text(\"User name:\\(settings.username)\")\n .padding()\n \n Button(\"John Doe\"){\n settings.username = \"Jhon Doe\"\n }\n Button(\"Anonymous\"){\n settings.username = \"Anonymous\"\n }\n \n Text(\"Child View\")\n }\n .padding()\n }\n}\n\n\n#Preview {\n ContentView()\n}\n<\/code><\/pre>\n\n\n\n
\ud83d\udc49\ud83c\udffb \uc2a4\uc704\ud504\ud2b8\uc5d0\uc11c ObservedObject\uc640 StateObject\ub97c \uc0ac\uc6a9\ud558\ub294 \uac04\ub2e8\ud55c \ubc29\ubc95\uc785\ub2c8\ub2e4.This is a simple way to use ObservedObject and StateObject in Swift. \u2714\ufe0f @StateObject\uc640\u00a0@ObservedObject\ub294 \ub458\ub2e4 \ubdf0\uc5d0 \ubc14\uc778\ub529\ud558\ub294 \ubc29\ubc95\uc774\uc9c0\ub9cc, \ub458\uc740 \uc57d\uac04\uc758 \ucc28\uc774\uac00 \uc788\uc2b5\ub2c8\ub2e4.Both @StateObject and @ObservedObject are methods for binding to a view, but there are slight differences between the two. \u2714\ufe0f @StateObject — \uc77c\ubc18\uc801\uc73c\ub85c \ubdf0\uc5d0\uc11c \uc9c1\uc811 \uc0c1\ud0dc \uac1d\uccb4\ub97c \uc0dd\uc131\ud558\uace0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19,1],"tags":[],"class_list":["post-5792","post","type-post","status-publish","format-standard","hentry","category-swift","category-uncategorized","missing-thumbnail"],"_links":{"self":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/5792","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/comments?post=5792"}],"version-history":[{"count":12,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/5792\/revisions"}],"predecessor-version":[{"id":5805,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/posts\/5792\/revisions\/5805"}],"wp:attachment":[{"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/media?parent=5792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/categories?post=5792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.freelifemakers.org\/wordpress\/index.php\/wp-json\/wp\/v2\/tags?post=5792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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