add ios defs for file and font fns

src/app/core/platform/file_dialog.mm

@@ -12,10 +12,33 @@
 
 #if TARGET_IPHONE_SIMULATOR == 1
 /* iOS in Xcode simulator */
+std::string FileDialogWrapper::ShowOpenFileDialog() { return ""; }
+
+std::string FileDialogWrapper::ShowOpenFolderDialog() { return ""; }
+
+std::vector<std::string> FileDialogWrapper::GetFilesInFolder(const std::string& folder) {
+  return {};
+}
+
+std::vector<std::string> FileDialogWrapper::GetSubdirectoriesInFolder(const std::string& folder) {
+  return {};
+}
 
 #elif TARGET_OS_IPHONE == 1
 /* iOS */
 
+std::string FileDialogWrapper::ShowOpenFileDialog() { return ""; }
+
+std::string FileDialogWrapper::ShowOpenFolderDialog() { return ""; }
+
+std::vector<std::string> FileDialogWrapper::GetFilesInFolder(const std::string& folder) {
+  return {};
+}
+
+std::vector<std::string> FileDialogWrapper::GetSubdirectoriesInFolder(const std::string& folder) {
+  return {};
+}
+
 #elif TARGET_OS_MAC == 1
 /* macOS */
 

src/app/core/platform/font_loader.mm

@@ -13,9 +13,11 @@
 
 #if TARGET_IPHONE_SIMULATOR == 1
 /* iOS in Xcode simulator */
+void LoadSystemFonts() {}
 
 #elif TARGET_OS_IPHONE == 1
 /* iOS */
+void LoadSystemFonts() {}
 
 #elif TARGET_OS_MAC == 1
 /* macOS */