Question

我的视频内容有问题。我想从我的viewcontroller加载视频，我收到此错误： [NSURL initFileURLWithPath：]：nil字符串参数当我尝试从网址加载视频时，视频无法显示。

我确信我的变量targetURN不是nil。

从这里我加载了我的viewcontroller：

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    switch (buttonIndex) {
        case 0:
            [self openVideoView:@"Video"];
        break;
        case 1:
            [self openWebview:@"About"];
        break;
        case 2:
            [self openWebview:@"http://www.url.com"];
        break;
    }
}

- (void)openVideoView:(NSString *)url{
    IDPVideoView *vv = [[IDPVideoView alloc] initWithURN:url];
    [self presentModalViewController:vv animated:NO];    
}

在我的viewcontroller中：

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSURL *videoURL = nil;

    if ([self.targetURN hasPrefix:@"http"])
    {
        videoURL = [NSURL URLWithString:targetURN];
    }
    else
    {
        videoURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:targetURN ofType:@"mp4"]];
    }
    if(videoURL != nil) {
        MPMoviePlayerController *moviePlayer = 
        [[MPMoviePlayerController alloc] initWithContentURL:videoURL];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];

        moviePlayer.controlStyle = MPMovieControlStyleDefault;
        moviePlayer.shouldAutoplay = YES;
        [moviePlayer prepareToPlay];
        [self.view addSubview:moviePlayer.view];
        [moviePlayer setFullscreen:YES animated:YES];
    }
}

Answer 1

您是否尝试过首先分配网址？

NSURL *vidURL = [[NSURL alloc] initWithString:self.targetURN];

作为一般建议，请始终尝试使用self.targetURN，或将其同步到其他名称，例如

@synchronize targetURN = _targetURN

然后在您的代码中使用_targetURN。这可以确保您（无论如何）使用正确的属性。

（当然这适用于所有属性）

Answer 2

我通过添加此行来解决错误部分

NSString *urlString = [NSString stringWithFormat:url];

- (void)openVideoView:(NSString *)url{
    NSString *urlString = [NSString stringWithFormat:url];
    IDPVideoView *vv = [[IDPVideoView alloc] initWithURN:url];
    [self presentModalViewController:vv animated:NO];    
}

但视频仍未显示。

IOS [NSURL initFileURLWithPath：]：加载视频时的nil字符串参数

2 个答案: