Load custom fonts in iOS

gistfile1.m

#import <dlfcn.h>

NSUInteger loadFonts() {
  NSUInteger newFontCount = 0;
  NSBundle *frameworkBundle = [NSBundle bundleWithIdentifier:@"com.apple.GraphicsServices"];
  const char *frameworkPath = [[frameworkBundle executablePath] UTF8String];
  if (frameworkPath) {
    void *graphicsServices = dlopen(frameworkPath, RTLD_NOLOAD | RTLD_LAZY);
    if (graphicsServices) {
      BOOL (*GSFontAddFromFile)(const char *) = dlsym(graphicsServices, "GSFontAddFromFile");
      if (GSFontAddFromFile)
        for (NSString *fontFile in [[NSBundle mainBundle] pathsForResourcesOfType:@"ttf" inDirectory:nil])
          newFontCount += GSFontAddFromFile([fontFile UTF8String]);
    }
  }
  return newFontCount;
}

// ...

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
  loadFonts();
  // ...
}