Fix emitting current connection state on iOS (#547)

Fixes #540

Author: mikolak

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 2.3.1
 
 * Fix connection timeout on iOS
+* Fix emitting current connection state on iOS
 
 ## 2.3.0
 

ios/Classes/FlutterBleLibPlugin.m

@@ -235,7 +235,7 @@ - (void)observeConnectionState:(FlutterMethodCall *)call result:(FlutterResult)r
     BOOL emitCurrentValue = ((NSNumber *)call.arguments[ARGUMENT_KEY_EMIT_CURRENT_VALUE]).boolValue;
     if (emitCurrentValue == YES) {
         Resolve resolve = ^(id isConnected) {
-            if ((BOOL)isConnected == YES) {
+            if ([isConnected boolValue] == YES) {
                 [self.connectionStateStreamHandler onConnectedEvent:call.arguments[ARGUMENT_KEY_DEVICE_IDENTIFIER]];
             } else {
                 [self.connectionStateStreamHandler emitDisconnectedEvent:call.arguments[ARGUMENT_KEY_DEVICE_IDENTIFIER]];