react-native bundle --entry-file index.ios.js --platform ios --dev false --bundle-output ./ios/bundle/index.ios.jsbundle --assets-dest ./ios/bundle

//AppDelegate.m


//jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];
 jsCodeLocation = [[NSBundle mainBundle] URLForResource:@"bundle/index.ios" withExtension:@"jsbundle"];