Removing subviews programmatically - ios

Question

I got this code inside my didReceiveRemoteNotification: method in appdelegate
I would like to know how can I remove this subviews using a delay, it is supposed the subviews show info from a push notification but I want them to disappear after 3.5 seconds(delay2)
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
NSLog(#"remote notification: %#",[userInfo description]);
NSDictionary *apsInfo = [userInfo objectForKey:#"aps"];
NSString *alert = [apsInfo objectForKey:#"alert"];
NSLog(#"Received Push Alert: %#", alert);
NSString *sound = [apsInfo objectForKey:#"sound"];
NSLog(#"Received Push Sound: %#", sound);
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
NSString *badge = [apsInfo objectForKey:#"badge"];
NSLog(#"Received Push Badge: %#", badge);
application.applicationIconBadgeNumber = [[apsInfo objectForKey:#"badge"] integerValue];
// Create the UILabel instance
CGRect myFrame = CGRectMake(0, 20, 320, 50);
UIView *myView = [[UIView alloc] initWithFrame:myFrame];
myView.backgroundColor = [UIColor blueColor];
[self.window addSubview:myView];
[myView release];
UILabel *aLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 35, 300, 20)];
[aLabel setText:alert];
[self.window addSubview:aLabel];
[aLabel release];
NSString *path = [[NSBundle mainBundle] pathForResource:#"sound"ofType:#"mp3"];
AVAudioPlayer* theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
[theAudio play];
//SONAR//
[self performSelector:#selector(delay2) withObject:nil afterDelay:3.5];
}
-(void)delay2 {
NSString *path = [[NSBundle mainBundle] pathForResource:#"sound"ofType:#"mp3"];
AVAudioPlayer* theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
[theAudio play];
}

Answer 1

You can use removeFromSuperview instance method of UIView.
While adding views on window set tag to all. And in delay2 method remove them using tag & removeFromSuperview method.
CGRect myFrame = CGRectMake(0, 20, 320, 50);
UIView *myView = [[UIView alloc] initWithFrame:myFrame];
myView.backgroundColor = [UIColor blueColor];
[myView setTag:999];
[self.window addSubview:myView];
[myView release];
UILabel *aLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 35, 300, 20)];
[aLabel setText:alert];
[aLabel setTag:999];
[self.window addSubview:aLabel];
[aLabel release];
-(void)delay2 {
for(UIView *subView in window.subviews)
{
if(subView.tag == 999)
[subView removeFromSuperview];
}
}