play animation regardless of any screen iphone - iphone

Question

i have some animation to be played at some point in time. that time is decided by some thread running in the backgroud. now i want to play the animation regardless of which screen the user is on. here is screen hierarchy.
login-->homescreen(thread starts running from viewdidload).
from home screen the user may navigate to any other screen and i want the animation to be played. right now i have the animationviewcontrller a membervariable in the homescreen and i am calling it by allocing and initing and pushing and popping when animation is done. and it works only 10% of the time. i have tried performselectoronmainthread and its still the same.
How do i redesign my code such that is plays on anyscreen.
here is my code for my thread.
[self startTimerThread]; // in viewdidload
-(void)startTimerThread
{
homescreenthread = [[NSThread alloc] initWithTarget:self selector:#selector(setupTimerThread) object:nil];
[homescreenthread start];
}
-(void)setupTimerThread
{
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
NSTimer* timer = [NSTimer timerWithTimeInterval:5
target:self
selector:#selector(findnewmessages)
userInfo:nil
repeats:YES];
NSRunLoop* runLoop = [NSRunLoop currentRunLoop];
[runLoop addTimer:timer forMode:NSRunLoopCommonModes];
//[runLoop addTimer:timer forModes:NSRunLoopCommonModes];
[runLoop run];
[pool release];
}
-(void)findnewmessages
{//finding message from server here. i am using the following request
NSData *serverReply = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *replyString = [[NSString alloc] initWithBytes:[serverReply bytes] length:[serverReply length] encoding: NSASCIIStringEncoding];
//i have omitted lot of other code.
}

Answer 1

use the delegate of the app to display the animation view.
id appDelegate = [UIApplication sharedApplication].delegate;
[appDelegate.m_window addSubview:viewController.view];
Also if you are tying to draw anything on the screen it should be done on main thread.
Please let me know if it helps.