Video won't play on iPhone 5.0 simulator - iphone

Question

Im new to xCode programming, ive got this code from an ebook tutorial playing mp4 xCode.
function triggered from a button
(IBAction)playMovie:(id)sender {
NSString *filepath = [[NSBundle mainBundle] pathForResource:#"videoSample" ofType:#"mp4"];
NSURL *fileURL = [NSURL fileURLWithPath:filepath];
MPMoviePlayerController *moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];
[[NSNotificationCenter defaultCenter]addObserver:self selector:#selector(moviePlaybackComplete:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayerController];
[self.view addSubview:moviePlayerController.view];
moviePlayerController.fullscreen=YES;
[moviePlayerController play];
moviePlayerController.scalingMode = MPMovieScalingModeFill;
}
called from play movie function
(void)moviePlaybackComplete:(NSNotification *)notification{
MPMoviePlayerController *moviePlayerController = [notification
object];
[[NSNotificationCenter defaultCenter]removeObserver:self
name:MPMoviePlayerPlaybackDidFinishNotification
object:moviePlayerController];
[moviePlayerController.view removeFromSuperview];
}
Ive got no error and warning after i build it. it just output a blank screen after i click the button that triggers the playMovie function. Im confuse ive google it and still got no idea on how to solve the proble.
Im using xCode 4.2 iOS SDK 5.0

Answer 1

try this....replace "example" with the name of your file and "m4v" with the type of file e.g. "mp4" (not .mp4 and dont put the .mp4 bit in the name of the file)
-(IBAction)playVideo:(id)sender;
{
NSString *path = [[NSBundle mainBundle] pathForResource:#"example" ofType:#"m4v"];
MPMoviePlayerViewController* tmpMoviePlayViewController=[[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL fileURLWithPath:path]];
if (tmpMoviePlayViewController) {
tmpMoviePlayViewController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
[self presentModalViewController:tmpMoviePlayViewController animated:YES];
tmpMoviePlayViewController.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(myMovieViewFinishedCallback:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:tmpMoviePlayViewController];
[tmpMoviePlayViewController.moviePlayer play];
}
}
-(void)myMovieFinishedCallback:(NSNotification*)theNotification
{
MPMoviePlayerController *moviePlayer=[theNotification object];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:MPMoviePlayerPlaybackDidFinishNotification
object:moviePlayer];
[moviePlayer.view removeFromSuperview];
}

Answer 2

I don't know if you are still looking for the answer. Here's what you can try - declare the MPMoviePlayerController in your header(.h) file (i.e. make it a member variable).
MPMoviePlayerController *moviePlayerController;
and add this to your .m file
moviePlayerController = [[MPMoviePlayerController alloc] initWithContentURL:fileURL];
If it still does not work then try to declare it as a #property.