add 添加开关控制 review by daiqiang

@@ -12,6 +12,7 @@
 #import <React/RCTConvert.h>
 #import <React/RCTDefines.h>
 #import <React/fishhook.h>
+#import <React/RCTLog.h> 
 
 #if defined(__IPHONE_OS_VERSION_MAX_ALLOWED) && __IPHONE_OS_VERSION_MAX_ALLOWED >= 110000 /* __IPHONE_11_0 */
 #import <os/log.h>
@@ -94,7 +95,9 @@ static void my_os_log_error_impl(void *dso, os_log_t log, os_log_type_t type, co
 
 - (void)start
 {
-  return;
+  if(!RCTLOG_ENABLED){
+    return;
+  }
   [self stop];
   _socket = [[RCTSRWebSocket alloc] initWithURL:_url];
   _socket.delegate = self;

@@ -530,7 +530,10 @@ RCT_NOT_IMPLEMENTED(- (instancetype)init)
 
 - (void)_connect;
 {
-  return;
+  if(!RCTLOG_ENABLED){
+    return;
+  }
+  
   if (!_scheduledRunloops.count) {
     [self scheduleInRunLoop:[NSRunLoop RCTSR_networkRunLoop] forMode:NSDefaultRunLoopMode];
   }