iOS Play video black screen? - ios

Question

I have been browsing through Google for various explanations but I STILL couldn't figure out when this code fires the screen is pitch black. Anyone able to spot a mistake?
UPDATE
- (IBAction)playVideo:(id)sender {
NSURL *videoUrl = [[DataStore singletonInstance] getVideoUrl:self withUuid:self.eventDetailVC.event.uuid];
if ([videoUrl checkResourceIsReachableAndReturnError:nil] == NO) {
NSLog(#"Video doesn't not exist.");
return;
}
MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:videoUrl];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:player];
[previewView addSubview:player.view];
player.view.frame = previewView.bounds;
player.controlStyle = MPMovieControlStyleDefault;
[player play];
}
- (void)moviePlayBackDidFinish:(NSNotification*)notification {
NSLog(#"moviePlayBackDidFinish: called");
MPMoviePlayerController *player = [notification object];
[[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification
object:player];
// Checking for errors
NSDictionary *notiUserInfo = [notification userInfo];
if (notiUserInfo != nil) {
NSError *errorInfo = [notiUserInfo objectForKey:#"error"];
if ([[errorInfo domain] isEqualToString:#"MediaPlayerErrorDomain"]) {
UIAlertView *notice = [[UIAlertView alloc] initWithTitle:#"Error"
message:[errorInfo localizedDescription]
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[notice show];
return;
}
}
// Remove from view
[player.view removeFromSuperview];
[player stop];
}
FYI moviePlayBackDidFinish is NOT called at all. I don't know why.

Answer 1

Create property for MPMoviePlayerController, because you retain view after adding it as subview, but not retain controller.
#property (strong, nonatomic) MPMoviePlayerController *player;
...
#synthesize player = _player;
...
- (IBAction)playVideo:(id)sender
{
NSURL *videoUrl = [[DataStore singletonInstance] getVideoUrl:self withUuid:self.eventDetailVC.event.uuid];
if ([videoUrl checkResourceIsReachableAndReturnError:nil] == NO)
{
NSLog(#"Video doesn't not exist.");
return;
}
self.player = [[MPMoviePlayerController alloc] initWithContentURL:videoUrl];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
[previewView addSubview:_player.view];
_player.view.frame = previewView.bounds;
_player.controlStyle = MPMovieControlStyleDefault;
[_player play];
}
- (void)moviePlayBackDidFinish:(NSNotification*)notification
{
NSLog(#"moviePlayBackDidFinish: called");
[[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
// Checking for errors
NSDictionary *notiUserInfo = [notification userInfo];
if (notiUserInfo != nil)
{
NSError *errorInfo = [notiUserInfo objectForKey:#"error"];
if ([[errorInfo domain] isEqualToString:#"MediaPlayerErrorDomain"])
{
UIAlertView *notice = [[UIAlertView alloc] initWithTitle:#"Error"
message:[errorInfo localizedDescription]
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[notice show];
return;
}
}
// Remove from view
[_player.view removeFromSuperview];
[_player stop];
self.player = nil;
}