SampleView.swift

import Foundation
import UIKit
import SpreadsheetView

class SampleView: UIView {
  
  let label = UILabel(frame: CGRect(x: 0, y: 0, width: 150, height: 50))
  private var _txt: String = "This is swift"
  
  override init(frame: CGRect) {
    super.init(frame: frame)

    
    self.label.text = "This is SWIFT"
    self.addSubview(self.label)
 

    let controller = ViewController();

    self.addSubview(controller.view);
  }

  required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }
  
  var txt: NSString? {
    set {
      if newValue != nil {
        self._txt = newValue! as String;
        //self.setNeedsDisplay();
        self.label.text = self._txt;

      }
    }
    get {
      return nil;
    }
  }

}

SampleViewManager.swift

import Foundation

@objc(SampleViewManager)
class SampleViewManager : RCTViewManager {
  
  override func view() -> UIView! {
    return SampleView();
  }
  
}

SampleViewModule.h

#import <Foundation/Foundation.h>
#import <React/RCTView.h>

@interface SampleViewModule : RCTView

@property (nonatomic, assign) NSString *txt;

@end

SampleViewModule.m

#import <React/RCTBridgeModule.h>
#import <React/RCTViewManager.h>


#import "SampleViewModule.h"

@interface RCT_EXTERN_MODULE(SampleViewManager, RCTViewManager)

RCT_EXPORT_VIEW_PROPERTY(txt, NSString);

@end

ss-Bridging-Header.h

#import "React/RCTViewManager.h"

ss.md

http://i.imgur.com/4uWEsdU.png http://i.imgur.com/pLxpcOx.png