MPMoviePlayerController not working in iOS4 - iphone

Question

I'm using the first answer from
iOS 4 + MPMoviePlayerController
to try and get MPMoviePlayerController to play. In the simulator (iPhone device with iOS4), I hear sound but no video. On the device (iPhone 3GS and iOS4), I don't get anything. Here's my code:
MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:moviePath]];
moviePlayer.movieControlMode = MPMovieControlModeDefault;
if ([moviePlayer respondsToSelector:#selector(view)]) {
moviePlayer.controlStyle = MPMovieControlStyleFullscreen;
[moviePlayer.view setFrame:self.view.bounds];
[self.view addSubview:moviePlayer.view];
}
[moviePlayer play];
Any ideas what I'm doing wrong?

Answer 1

I just tested the following code on iOS4 + iPhone 4 (and a 3GS)—it works fine. At first blush, I think your code's problem is not calling setFullscreen:animated on your MPMoviePlayerController instance.
- (void)willEnterFullscreen:(NSNotification*)notification {
NSLog(#"willEnterFullscreen");
}
- (void)enteredFullscreen:(NSNotification*)notification {
NSLog(#"enteredFullscreen");
}
- (void)willExitFullscreen:(NSNotification*)notification {
NSLog(#"willExitFullscreen");
}
- (void)exitedFullscreen:(NSNotification*)notification {
NSLog(#"exitedFullscreen");
[self.movieController.view removeFromSuperview];
self.movieController = nil;
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)playbackFinished:(NSNotification*)notification {
NSNumber* reason = [[notification userInfo] objectForKey:MPMoviePlayerPlaybackDidFinishReasonUserInfoKey];
switch ([reason intValue]) {
case MPMovieFinishReasonPlaybackEnded:
NSLog(#"playbackFinished. Reason: Playback Ended");
break;
case MPMovieFinishReasonPlaybackError:
NSLog(#"playbackFinished. Reason: Playback Error");
break;
case MPMovieFinishReasonUserExited:
NSLog(#"playbackFinished. Reason: User Exited");
break;
default:
break;
}
[self.movieController setFullscreen:NO animated:YES];
}
- (void)showMovie {
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(willEnterFullscreen:) name:MPMoviePlayerWillEnterFullscreenNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(willExitFullscreen:) name:MPMoviePlayerWillExitFullscreenNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(enteredFullscreen:) name:MPMoviePlayerDidEnterFullscreenNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(exitedFullscreen:) name:MPMoviePlayerDidExitFullscreenNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(playbackFinished:) name:MPMoviePlayerPlaybackDidFinishNotification object:nil];
NSURL* movieURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:#"tron" ofType:#"mov"]];
self.movieController = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
if ([self.movieController respondsToSelector:#selector(view)]) {
self.movieController.view.frame = self.view.frame;
[self.view addSubview:movieController.view];
[self.movieController setFullscreen:YES animated:YES];
}
[self.movieController play];
}
// This method is set as the action for an on-screen button
- (void)movieTime:(id)sender {
[self showMovie];
}

Answer 2

For MPMoviePlayerController view is a property, not a method, so you can't use respondsToSelector: on it if it doesn't have methods synthesized or written for it (i.e. is declared #dynamic). Which I think is true for most readonly properties in UIKit.