Wrap Compose baked UIViewController into SwiftUI instead of UIKit. (#2782)

- fixes also top bar appearance
- removed constant offset workaround as a result

experimental/examples/imageviewer/iosApp/iosApp.xcodeproj/project.pbxproj

@@ -9,6 +9,7 @@
 /* Begin PBXBuildFile section */
 		2152FB042600AC8F00CF470E /* iosApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2152FB032600AC8F00CF470E /* iosApp.swift */; };
 		C1FC908188C4E8695729CB06 /* Pods_iosApp.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 8DE96E47030356CE6AD9794A /* Pods_iosApp.framework */; };
+		D5DE79A846260A9C7654FCD6 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D5DE73F83209A8ECD8AB0ED9 /* ContentView.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -19,6 +20,7 @@
 		7555FF8C242A565B00829871 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		8DE96E47030356CE6AD9794A /* Pods_iosApp.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_iosApp.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		AB3632DC29227652001CCB65 /* TeamId.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = TeamId.xcconfig; sourceTree = "<group>"; };
+		D5DE73F83209A8ECD8AB0ED9 /* ContentView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -57,6 +59,7 @@
 			children = (
 				7555FF8C242A565B00829871 /* Info.plist */,
 				2152FB032600AC8F00CF470E /* iosApp.swift */,
+				D5DE73F83209A8ECD8AB0ED9 /* ContentView.swift */,
 			);
 			path = iosApp;
 			sourceTree = "<group>";
@@ -199,6 +202,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				2152FB042600AC8F00CF470E /* iosApp.swift in Sources */,
+				D5DE79A846260A9C7654FCD6 /* ContentView.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

experimental/examples/imageviewer/iosApp/iosApp/ContentView.swift

@@ -0,0 +1,21 @@
+import UIKit
+import SwiftUI
+import shared
+
+struct ComposeView: UIViewControllerRepresentable {
+    func makeUIViewController(context: Context) -> UIViewController {
+        Main_iosKt.MainViewController()
+    }
+
+    func updateUIViewController(_ uiViewController: UIViewController, context: Context) {}
+}
+
+struct ContentView: View {
+    var body: some View {
+        ComposeView()
+                .ignoresSafeArea(.keyboard) // Compose has own keyboard handler
+    }
+}
+
+
+

experimental/examples/imageviewer/iosApp/iosApp/iosApp.swift

@@ -1,15 +1,10 @@
-import UIKit
-import shared
+import SwiftUI
 
 @main
-class AppDelegate: UIResponder, UIApplicationDelegate {
-    var window: UIWindow?
-
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
-        window = UIWindow(frame: UIScreen.main.bounds)
-        let mainViewController = Main_iosKt.MainViewController()
-        window?.rootViewController = mainViewController
-        window?.makeKeyAndVisible()
-        return true
+struct iOSApp: App {
+    var body: some Scene {
+        WindowGroup {
+            ContentView()
+        }
     }
 }

experimental/examples/imageviewer/shared/src/iosMain/kotlin/example/imageviewer/main.ios.kt

@@ -10,12 +10,5 @@ import platform.UIKit.UIViewController
 
 fun MainViewController(): UIViewController =
     Application("Imageviewer") {
-        Column {
-            // To skip upper part of screen.
-            Box(
-                modifier = Modifier
-                    .height(30.dp)
-            )
-            ImageViewerIos()
-        }
+        ImageViewerIos()
     }