Objective C method not working properly inside objective C++ - ios

Question

I'm calling a objective C method in objective C++ class where I create a label also hiding the status bar but the status bar is hiding fine while the label was not getting created and shown! If I call that method anywhere else other than this objective C++ class it works fine without any issue
The Objective C++ class is below
void audioRouteChangeListenerCallback (void *inUserData, AudioSessionPropertyID inPropertyID, UInt32 inPropertyValueSize, const void *inPropertyValue )
{
// ensure that this callback was invoked for a route change
if (inPropertyID != kAudioSessionProperty_AudioRouteChange) return;
{
// Determines the reason for the route change, to ensure that it is not
// because of a category change.
CFDictionaryRef routeChangeDictionary = (CFDictionaryRef)inPropertyValue;
CFNumberRef routeChangeReasonRef = (CFNumberRef)CFDictionaryGetValue (routeChangeDictionary, CFSTR (kAudioSession_AudioRouteChangeKey_Reason) );
SInt32 routeChangeReason;
CFNumberGetValue (routeChangeReasonRef, kCFNumberSInt32Type, &routeChangeReason);
if (routeChangeReason == kAudioSessionRouteChangeReason_OldDeviceUnavailable) {
//Handle Headset Unplugged
NSLog(#"PluggedOut");
}
else if (routeChangeReason == kAudioSessionRouteChangeReason_NewDeviceAvailable)
{
//Handle Headset plugged in
NSLog(#"Something Plugged In");
audiotest *test = [[audiotest alloc] init];
ArmorController *armorcontroller =[[ArmorController alloc]init];
NSLog(#"%d", [test Checkheadphonestatus]);
if([test Checkheadphonestatus] == 1)
{
[armorcontroller deviceconnectedalert];
}
else if([test Checkheadphonestatus] == 0)
{
NSLog(#"Device not connected");
}
}
}
The objective C method which not executing properly inside objective C++ class is below
- (void) deviceconnectedalert
{
[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade];
self.titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 20, 320, 30)];
[self.titleLabel setText:#"Device Connected Successfully!"];
self.titleLabel.backgroundColor =[UIColor redColor];
[self.view addSubview:self.titleLabel];
}