Running react-native app on iOS device using offline bundle

Question

The official React Native documentation to run app on iOS device using offline bundle says

Open ios/YourApp/AppDelegate.m

Uncomment the line, jsCo

Answer 1

The only fix I could get to work on react native 0.37 was to go back to the "old school" method of manually editing jsCodeLocation in AppDelegate.m. Debugging is good again!

Be sure your device and development machine are on the same wi-fi, and maybe disconnect any wired Ethernet until you get it working.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  NSURL *jsCodeLocation;

  // Comment-out, cannot get past error: bundleURL must be non-nil when not implementing loadSourceForBridge
  //jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];

#if DEBUG
  NSLog(@"AppDelegate:DEBUG");

#if TARGET_IPHONE_SIMULATOR
  NSLog(@"AppDelegate:DEBUG:TARGET_IPHONE_SIMULATOR");
  jsCodeLocation = [NSURL URLWithString:@"http://localhost:8081/index.ios.bundle"];
#else
  NSLog(@"AppDelegate:DEBUG:!TARGET_IPHONE_SIMULATOR");
  NSLog(@"To device debug, open RCTWebSocketExecutor.m & replace localhost with MacBook IP.");
  // Get dev host IP Address:
  //    ifconfig | grep inet\ | tail -1 | cut -d " " -f 2
  jsCodeLocation = [NSURL URLWithString:@"http://192.16.29.213:8081/index.ios.bundle"];
#endif

#else
  NSLog(@"AppDelegate:RELEASE jsbundle");
  jsCodeLocation = [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];
#endif

  NSLog(@"jsCodeLocation = %@",jsCodeLocation);


  RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
                                                      moduleName:@"BluetoothConnect"
                                               initialProperties:nil
                                                   launchOptions:launchOptions];
  rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];

  self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
  UIViewController *rootViewController = [UIViewController new];
  rootViewController.view = rootView;
  self.window.rootViewController = rootViewController;
  [self.window makeKeyAndVisible];
  return YES;
}