检查iPhone中的网络可达性后，应用程序崩溃了吗? [英] app crashes after checking network reachability in iphone?

问题描述

我有一个mpmovieplayercontroller可以在后台播放在线音乐和avaudiosession以便在后台播放相同的音乐，当首次启动没有网络访问的应用程序时，通常我显示没有互联网连接"，当我尝试连接到互联网并播放后显示错误

i have a mpmovieplayercontroller to play online music and avaudiosession to play the same music at background, when the first time app launches without network access, normally i shows "no internet connection" , when i tried after connecting to internet and playing it shows the error

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'An AVPlayerItem cannot be associated with more than one instance of AVPlayer'

我的代码在这里

static MPMoviePlayerController *player=nil;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) 
    {
        // Custom initialization

        [MainViewController  stopStreaming];

        player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:@"http://159.253.145.180:7104"]];
        player.movieSourceType = MPMovieSourceTypeStreaming;
        player.view.hidden = YES;
        [self.view addSubview:player.view];
        [player prepareToPlay];
        [player play];
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSError *setCategoryErr = nil;
    NSError *activationErr  = nil;
    [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: &setCategoryErr];
    [[AVAudioSession sharedInstance] setActive: YES error: &activationErr];
    [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    UIBackgroundTaskIdentifier newTaskId = UIBackgroundTaskInvalid;
    newTaskId = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:NULL];

    Reachability* reachabile = [Reachability reachabilityWithHostName:@"www.apple.com"];
    NetworkStatus remoteHostStatus = [reachabile currentReachabilityStatus];

    if(remoteHostStatus == NotReachable) 
    {
        NSLog(@"not reachable");
        UIAlertView *notReachableAlert=[[UIAlertView alloc]initWithTitle:@"NO INTERNET CONNECTION" message:@"This Application Need Internet To Run" delegate:self cancelButtonTitle:@"Okay Buddy" otherButtonTitles: nil];
        notReachableAlert.delegate=self;
        [notReachableAlert show];
        [notReachableAlert release];
    }

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayerPlaybackStateDidChange:) name:MPMoviePlayerPlaybackStateDidChangeNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayerLoadStateChanged:) name:MPMoviePlayerLoadStateDidChangeNotification object:player];

    MPVolumeView *volumeView = [[[MPVolumeView alloc] initWithFrame:CGRectMake(22, 320, 200, 15)] autorelease];
    volumeView.center = CGPointMake(152,372);
    [volumeView sizeToFit];
    [self.view addSubview:volumeView];    // Do any additional setup after loading the view from its nib.
}

当我连接到互联网后单击播放按钮时，应用程序崩溃了吗?

app crashes when i click play button after connecting to internet, any solution?

推荐答案

我认为这是由于静态播放器引起的.尝试使用movieplayer的属性

I think this is due to static player. Try using a property of movieplayer

使用:

@property (nonatomic,retain) MPMoviePlayerController *player;

在实施中:

@synthesize player = _player;

初始化:

MPMoviePlayerController *plyr = [MPMoviePlayerController alloc] init];
self.player = plyr;
[plyr relaease];

在您的代码中

[controller setContentURL:movieURL];

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