2

私はさまざまな説明を求めてGoogleを閲覧してきましたが、このコードがいつ起動して画面が真っ暗になるのかまだわかりませんでした. 誰でも間違いを見つけることができますか？

アップデート 

- (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];
}

参考までに、moviePlayBackDidFinish はまったく呼び出されません。どうしてか分かりません。

4

1 に答える 1

9

MPMoviePlayerControllerのプロパティを作成します。これは、サブビューとして追加した後もビューを保持しますが、コントローラーは保持しないためです。

@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;
}
于 2012-06-20T23:17:43.250 に答える