A problem with Media Player base on iOS4 and deploy iOS3 - iphone

Question

when Run on Device 3.1.2, why it also pass if(NSClassFromString(#"MPMoviePlayerViewController") != nil)
and do code of iOS4 then it will crash , how to fix this issues?
if(NSClassFromString(#"MPMoviePlayerViewController") != nil) {
// iOS 4 code
NSLog(#"MPMoviePlayerViewController");
MPMoviePlayerViewController *mp = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:AppDelegate.PushLink]];
if (mp) {
// save the movie player object
self.theMovie4 = mp;
[mp release];
//Present
[self presentMoviePlayerViewControllerAnimated:self.theMovie4];
// Play the movie!
self.theMovie4.moviePlayer.movieSourceType = MPMovieSourceTypeStreaming;
[self.theMovie4.moviePlayer play];
}
}
else {
//iOS 3 Code
AppDelegate = nil;
AppDelegate = [[UIApplication sharedApplication] delegate];
[AppDelegate ForceHideNavigationBar];
theMovie3 = nil;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePreloadDidFinish:)
name:MPMoviePlayerContentPreloadDidFinishNotification
object:theMovie3];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:theMovie3];
// Register to receive a notification when the movie scaling mode has changed.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(movieScalingModeDidChange:)
name:MPMoviePlayerScalingModeDidChangeNotification
object:theMovie3];
theMovie3 = [[MPMoviePlayerController alloc] initWithContentURL: [NSURL URLWithString:AppDelegate.PushLink]];
[theMovie3 play];
}

Answer 1

I am doing a very similar thing on my app which is using 4.0 as the base SDK and yet I am targeting iOS3 devices too. I had to check the OS version to properly provide the right code for the video playback. For example:
- (void) playMovieAtURL: (NSURL*) theURL {
NSLog(#"playMovieAtURL");
if ([[[UIDevice currentDevice] systemVersion] doubleValue] >= 3.2) {
NSLog(#"> 3.2");
MPMoviePlayerViewController *mp = [[MPMoviePlayerViewController alloc] initWithContentURL:theURL];
if (mp)
{
// save the movie player object
//self.moviePlayerViewController = mp;
//[mp release];
[self presentMoviePlayerViewControllerAnimated:mp];
mp.moviePlayer.movieSourceType = MPMovieSourceTypeFile;
[mp.moviePlayer play];
[mp release];
}
}
else if ([[[UIDevice currentDevice] systemVersion] doubleValue] < 3.2) {
NSLog(#"< 3.2");
MPMoviePlayerController* theMovie = [[MPMoviePlayerController alloc] initWithContentURL: theURL];
theMovie.scalingMode = MPMovieScalingModeAspectFill;
// Register for the playback finished notification
[[NSNotificationCenter defaultCenter]
addObserver: self
selector: #selector(myMovieFinishedCallback:)
name: MPMoviePlayerPlaybackDidFinishNotification
object: theMovie];
// Movie playback is asynchronous, so this method returns immediately.
[theMovie play];
}
}
Hope this helps!!

Answer 2

[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification object:nil];
NSString *movpath = [[NSBundle mainBundle] pathForResource:#"splash" ofType:#"mp4"];
MPMoviePlayerViewController* mpviewController = [[MPMoviePlayerViewController alloc]
initWithContentURL:[NSURL fileURLWithPath:movpath]];
[window addSubview:mpviewController.view];
[window makeKeyAndVisible];
MPMoviePlayerController *mp = [mpviewController moviePlayer];
[mp prepareToPlay];
[[mpviewController moviePlayer] play];
This code will work in iOS4
It however does quit once the movie completes because you must create the method for the notification. Also you need to release the movie there so that you can catch the memory leak.