Add Native Module in ReactNative : iOS

Steps to add native application in 
Supportive Links :
 https://facebook.github.io/react-native/docs/native-modules-setup
https://facebook.github.io/react-native/docs/native-modules-ios
https://facebook.github.io/react-native/docs/native-modules-android
https://github.com/BondGoat/react-native-native-video-player/issues/4#issuecomment-281138998

Native Modules · React Native
https://facebook.github.io


1. Open Terminal, Select Your React-native project path
2. Run command : $ npm install -g react-native-create-library
3. $ react-native-create-library <Name_Of_Lib>
4. Now Navigate to <Name_Of_Lib> path 
5. Run $ npm install
6. Under  <Name_Of_Lib> you will get Three folders iOs, Android , Windows

** Now Suppose we need to play youtube Player with native code….
Functionality : we pass Youtube id from main react-native project.. which will be use in native player. 
7. Open your Main iOS Project under react native &  add pod file 
8. Add pod 'youtube-ios-player-helper', '~> 0.1.4'
9. Pod install.
10. YOu can create a separate project and than add all your files with Main Storyboard under main react-native iOS folder
11. Open again <Name_Of_Lib>  iOS project
12. You will get .h/.m 
13. in .h file of <Name_Of_Lib> add method you which call from react-native project 
14. In .m file of <Name_Of_Lib>  define method which perform actions 
Here..functionality work like this..
		you already added your seperate module in main React-native folder, so you need to pass & open your initial controller of main storyboard.
So, 
 So, inside .m file method (<Name_of_Lib>) add appdelegate code.
  AppDelegate appDelegate = (AppDelegate )[UIApplication sharedApplication].delegate;
   [appDelegate goToYoutubeView:videoID];
			 
And Under main react-native appdelegate add one method which navigate to screen on main storyboard controller that added by you.
In Appldelegate .m (React-native folder)

// this method will be called from the RCTBridge
- (void) goToYoutubeView:(NSString*)url {
  NSLog(@"RN binding - Native View - MyViewController.swift - Load From");
        SingleVideoViewController vc = (SingleVideoViewController) [UIStoryboard storyboardWithName:@"Main" bundle:nil].instantiateInitialViewController;
          vc.youtubeUrl = url;
          [self.window.rootViewController presentViewController:vc animated:true completion:nil];
  }


This will be called as RCTBridge