fix(iOS): defer startTLS until didConnectToHost (#217)

Author: manoaxcend

ios/TcpSocketClient.m

@@ -66,6 +66,7 @@ @interface TcpSocketClient () {
     long _sendTag;
     SecTrustRef _peerTrust;
     SecIdentityRef _clientIdentity;
+    NSDictionary *_tlsOptionsPending;
 }
 
 - (id)initWithClientId:(NSNumber *)clientID
@@ -164,7 +165,7 @@ - (BOOL)connect:(NSString *)host
                                 error:error];
     }
     if (result && tlsOptions) {
-        [self startTLS:tlsOptions];
+        _tlsOptionsPending = [tlsOptions copy]; // Save for later
     }
     return result;
 }
@@ -572,9 +573,15 @@ - (void)socket:(GCDAsyncSocket *)sock
         return;
     }
 
-    // Show up if SSL handsake is done
+    // Show up if SSL handshake is done
     if (!_tls) {
-        [_clientDelegate onConnect:self];
+        if (_tlsOptionsPending) {
+            [self startTLS:_tlsOptionsPending];
+            _tlsOptionsPending = nil;
+        } else {
+            [_clientDelegate onConnect:self];
+            _connecting = false;
+        }
     }
     [sock readDataWithTimeout:-1 tag:_id.longValue];
 }