Person.m

@interface Person : NSObject <RCTBridgeModule>
@end

@implementation Logger

RCT_EXPORT_MODULE()

RCT_EXPORT_METHOD(greet:(NSString *)name)
{
  NSLog(@"Hi, %@!", name);
  [_bridge.eventDispatcher sendAppEventWithName:@"greeted"
                                           body:@{ @"name": name }];
}

@end

sampleview.swift

import UIKit
class SampleView: UIView {
  override init(frame: CGRect) {
    super.init(frame: frame)
    let label = UILabel(frame: CGRect(x: 0, y: 0, width: 100,
    height: 50))
    label.text = “This is Swift”
    self.addSubview(label)
  }
  required init?(coder aDecoder: NSCoder) {
    fatalError(“init(coder:) has not been implemented”)
  }
}