iOS端的注入方法 __fbBatchedBridgeConfig

RCTWebSocketExecutor.m

// file location
// node_module/react-native/Libraries/WebSocket
- (void)executeApplicationScript:(NSData *)script sourceURL:(NSURL *)URL onComplete:(RCTJavaScriptCompleteBlock)onComplete
{
  NSDictionary<NSString *, id> *message = @{
    @"method": @"executeApplicationScript",
    @"url": RCTNullIfNil(URL.absoluteString),
    @"inject": _injectedObjects,
  };
  [self sendMessage:message waitForReply:^(NSError *error, NSDictionary<NSString *, id> *reply) {
    onComplete(error);
  }];
}