需要 MPMoviePlayerController 初始化方面的帮助

Question

我有一个应用程序，允许用户使用向下钻取表视图模型从媒体项目列表移动到特定项目。

用户进入详细信息视图后，另一个表格视图存在允许用户选择特定媒体项目。

我在创建要播放的模态媒体播放器时遇到问题.mp4 项目。下面的代码是我到目前为止所拥有的。

if (indexPath.section == SectionHeader && indexPath.row == SectionHeaderEnclosure) {  
    if (item.enclosures) {  
        for (NSDictionary *dict in item.enclosures){ 

            NSString *url = [dict objectForKey:@"url"];  
            NSLog(@" url is : %@",url); 

            //EXPERIMENTAL
            MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];  

            // Register to receive a notification when the movie has finished playing.  
            [[NSNotificationCenter defaultCenter] addObserver:self  selector:@selector(moviePlayBackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];  

            if ([moviePlayer respondsToSelector:@selector(setFullscreen:animated:)]) {  
                // Use the 3.2 style API  
                moviePlayer.controlStyle = MPMovieControlStyleDefault;  
                moviePlayer.shouldAutoplay = YES;  
                [self.view addSubview:moviePlayer.view];  
                [moviePlayer setFullscreen:YES animated:YES];  
            } else {  
                // Use the 2.0 style API  
                moviePlayer.movieControlMode = MPMovieControlModeHidden;  
                [moviePlayer play];  
            }           
        }  
    }  
}

我需要这行的帮助： MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];

它给了我一个 NSInvaild Argument Exception 。我需要有关创建视频播放器以及随后从视图中删除的帮助。

Answer 1

看起来您已将 URL 存储为纯 NSString，而播放器需要一个 NSURL。这个怎么样？

MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] 
    initWithContentURL:[NSURL URLWithString:url]];