[ios] Switch About to SwiftUI

Signed-off-by: Yannik Bloscheck <git@yannikbloscheck.com>

iphone/Maps/UI/Help/About/ApoutOpenStreetMapView.swift

@@ -0,0 +1,45 @@
+import SwiftUI
+
+/// View for the about information for CoMaps (split up in its own view because of differences between OS versions)
+struct ApoutOpenStreetMapView: View {
+    // MARK: Properties
+    
+    /// The date fo the maps
+    private var mapsDate: String? {
+        let dateFormatter = DateFormatter()
+        dateFormatter.locale = Locale(identifier: "en_US_POSIX")
+        dateFormatter.dateFormat = "yyMMdd"
+        if let date = dateFormatter.date(from: String(FrameworkHelper.dataVersion())) {
+            dateFormatter.locale = Locale.autoupdatingCurrent
+            dateFormatter.dateStyle = .long
+            dateFormatter.timeStyle = .none
+            return dateFormatter.string(from: date)
+        }
+        
+        return nil
+    }
+    
+    
+    /// The actual view
+    var body: some View {
+        if let mapsDate {
+            VStack(alignment: .leading) {
+                HStack(alignment: .top, spacing: 12) {
+                    Image(.openStreetMapLogo)
+                        .resizable()
+                        .aspectRatio(1, contentMode: .fit)
+                        .frame(maxWidth: 50)
+                        .padding(.top, 6)
+                    VStack(alignment: .leading) {
+                        Text("osm_mapdata")
+                            .font(.headline)
+                            .bold()
+                        
+                        Text("osm_mapdata_explanation \(mapsDate)")
+                            .tint(.alternativeAccent)
+                    }
+                }
+            }
+        }
+    }
+}