先不多說，先把原生的OC控件代碼標出了

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

NS_ASSUME_NONNULL_BEGIN

@interface IOSWebView : RCTViewManager

@end

NS_ASSUME_NONNULL_END

#import "IOSWebView.h"
#import <WebKit/WebKit.h>
//iOS調(diào)用RN
#import <React/RCTEventDispatcher.h>
#import <React/RCTUIManager.h>

@interface IOSWebView ()

@property (nonatomic ,strong) WKWebView *webView;

@end

@implementation IOSWebView

RCT_EXPORT_MODULE();

- (UIView *)view
{
  WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, 0, 0)];
  webView.allowsBackForwardNavigationGestures = YES;
  self.webView = webView;
  return webView;
}

//reactTag是當前控件的tag值，不需要去管，releaseVLC是方法名，后面的one才是第一個參數(shù)，如果有幾個參數(shù)，可以在后面繼續(xù)添加
RCT_EXPORT_METHOD(releaseVLC:(nonnull NSNumber *)reactTag one:(NSString *)oneParam) {
  
  NSLog(@"reactTag = %@  secondParam = %@",reactTag,secondParam);
  
  [self.bridge.uiManager addUIBlock:^(__unused RCTUIManager * uiManager,NSDictionary *viewRegistry) {
    
    WKWebView *view = viewRegistry[reactTag];
    if (![view isKindOfClass:[WKWebView class]]) {
      RCTLogError(@"Invalid view returned from registry, expecting WKWebView, got: %@", view);
    } else {
      dispatch_async(dispatch_get_main_queue(), ^{
//        WKWebView * bannerView = (WKWebView *)viewRegistry[reactTag];
      });
    }
  }];
}

@end

下面的是RN的js代碼調(diào)用IOS的原生方法

import React, { Component } from 'react';
import { StyleSheet, Text, View, TouchableOpacity, requireNativeComponent, UIManager, findNodeHandle } from 'react-native';

//IOSWebView這個是原生控件的Class名稱，h5rn這是當前rn頁面
var UIWebView = requireNativeComponent('IOSWebView', h5rn) ;

export default class h5rn extends Component<{}> {

  constructor(props) {
    super(props);
    this.state = {
    };
  }

  _back() {
    UIManager.dispatchViewManagerCommand(
        //this.refs["uiwebview"]這是當前UIWebView在頁面上的屬性，可以按自己想法隨便寫
        findNodeHandle(this.refs["uiwebview"]),
        //IOSWebView是原生控件的Class名稱，releaseVLC是原生的方法名
        UIManager.getViewManagerConfig('IOSWebView').Commands.releaseVLC,
        //這個地方很重要，這個地方是入?yún)?，如果iOS原生沒有參數(shù)，你傳null,若有，這個地方必須是數(shù)組，參數(shù)放在數(shù)組中，數(shù)組的長度就是原生方法的參數(shù)個數(shù)，謹記
        ["2"]
      );
  }

  render() {
    return (
      <View style={{ flex: 1 }}>
        <View style={{ flex: 1 }}>
          <UIWebView ref={"uiwebview"} style={styles.IOSStyle}   />
          <TouchableOpacity style={{ with: gScreen.screen_width, height: 45 }} onPress={() => { this._back() }}>
            <Text>返回</Text>
          </TouchableOpacity>

        </View>
      </View>
    );
  }
}

var styles = StyleSheet.create({
  webview_style: {
  IOSStyle: {
    width: 300,
    height: 400,
  }
});

如有不對，請大家指教，謝謝大家