ios: prevent app freezing in create group view (#6079)

apps/ios/Shared/Views/NewChat/AddGroupView.swift

@@ -104,7 +104,9 @@ struct AddGroupView: View {
                 }
                 .foregroundColor(theme.colors.secondary)
                 .frame(maxWidth: .infinity, alignment: .leading)
-                .onTapGesture(perform: hideKeyboard)
+                .onTapGesture {
+                    focusDisplayName = false
+                }
             }
         }
         .onAppear() {
@@ -161,7 +163,8 @@ struct AddGroupView: View {
             } else {
                 Image(systemName: "pencil").foregroundColor(theme.colors.secondary)
             }
-            textField("Enter group name…", text: $profile.displayName)
+            TextField("Enter group name…", text: $profile.displayName)
+                .padding(.leading, 36)
                 .focused($focusDisplayName)
                 .submitLabel(.continue)
                 .onSubmit {
@@ -170,11 +173,6 @@ struct AddGroupView: View {
         }
     }
 
-    func textField(_ placeholder: LocalizedStringKey, text: Binding<String>) -> some View {
-        TextField(placeholder, text: text)
-            .padding(.leading, 36)
-    }
-
     func sharedGroupProfileInfo(_ incognito: Bool) -> Text {
         let name = ChatModel.shared.currentUser?.displayName ?? ""
         return Text(
@@ -185,7 +183,7 @@ struct AddGroupView: View {
     }
 
     func createGroup() {
-        hideKeyboard()
+        focusDisplayName = false
         do {
             profile.displayName = profile.displayName.trimmingCharacters(in: .whitespaces)
             profile.groupPreferences = GroupPreferences(history: GroupPreference(enable: .on))
@@ -217,6 +215,8 @@ struct AddGroupView: View {
     }
 }
 
+// Using this method may freeze the app in some cases, so it should be avoided when possible, especially when combined with .focussed modifier.
+// It also must only be called from background thread.
 func hideKeyboard() {
     UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
 }