add file_path.mm for bundle resource path

src/app/core/platform/file_path.h

@@ -0,0 +1,6 @@
+#ifndef YAZE_APP_CORE_PLATFORM_FILE_PATH_H
+#define YAZE_APP_CORE_PLATFORM_FILE_PATH_H
+
+std::string GetBundleResourcePath();
+
+#endif  // YAZE_APP_CORE_PLATFORM_FILE_PATH_H

src/app/core/platform/file_path.mm

@@ -0,0 +1,26 @@
+#include <iostream>
+#include <string>
+
+#if defined(__APPLE__) && defined(__MACH__)
+#include <Foundation/Foundation.h>
+#include <TargetConditionals.h>
+
+#if TARGET_IPHONE_SIMULATOR == 1
+std::string GetBundleResourcePath() {}
+#elif TARGET_OS_IPHONE == 1
+std::string GetBundleResourcePath() {
+  NSBundle* bundle = [NSBundle mainBundle];
+  NSString* resourceDirectoryPath = [bundle bundlePath];
+  NSString* path = [resourceDirectoryPath stringByAppendingString:@"/"];
+  return [path UTF8String];
+}
+#elif TARGET_OS_MAC == 1
+std::string GetBundleResourcePath() {
+  NSBundle* bundle = [NSBundle mainBundle];
+  NSString* resourceDirectoryPath = [bundle bundlePath];
+  NSString* path = [resourceDirectoryPath stringByAppendingString:@"/"];
+  return [path UTF8String];
+}
+
+#endif
+#endif

src/app/gui/zeml.cc

@@ -13,6 +13,7 @@
 
 #include "app/gui/canvas.h"
 #include "app/gui/input.h"
+#include "app/core/platform/file_path.h"
 
 namespace yaze {
 namespace app {
@@ -590,7 +591,18 @@ void BindSelectable(Node* node, bool* selected,
 std::string LoadFile(const std::string& filename) {
   std::string fileContents;
   const std::string kPath = "assets/layouts/";
-  std::ifstream file(kPath + filename);
+
+  #ifdef __APPLE__
+    #ifdef TARGET_OS_IOS
+        
+      const std::string kBundlePath = GetBundleResourcePath();
+      std::ifstream file(kBundlePath + filename);
+    #else
+      std::ifstream file(kPath + filename);
+    #endif
+  #else
+    std::ifstream file(kPath + filename);
+  #endif
 
   if (file.is_open()) {
     std::string line;