如何在 iPhone 中播放视频

Question

MPMoviePlayerController 中的 initWithContentURL: 是否首先下载视频文件然后开始播放，还是会像 youtube 中那样流式传输文件？

我想通过流媒体播放位于服务器中的视频，以免浪费时间。

如何在 iPhone 中进行流媒体播放？ 如果你知道的话，有人可以建议我吗？

提前致谢。

Answer 1

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];

if (!documentsDirectory) {
    NSLog(@"Documents directory not found!");
}
NSString *appFile;
NSArray *myWords = [[NSString stringWithFormat:@"%@",[[videolistArray objectAtIndex:[number intValue]] valueForKey:@"video"]] componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"/"]];
appFile = [documentsDirectory stringByAppendingPathComponent:[myWords lastObject]];
NSFileManager *fileMgr=[NSFileManager defaultManager];
if (![fileMgr fileExistsAtPath:appFile]) {
    NSData *imageData;
    NSURL *imageURL = [[[NSURL alloc] initWithString:[[videolistArray objectAtIndex:[number intValue]] valueForKey:@"video"] ] autorelease];
    if (imageURL) {
        imageData = [NSData dataWithContentsOfURL:imageURL];
    }

    [imageData writeToFile:appFile atomically:YES];
}
[pool release];


if (spinner) {
    [spinner stopAnimating];
    [spinner removeFromSuperview];
    [spinner release];
    spinner = nil;
}

---------------------------以上方法用于将视频保存到iPhone的文件系统中
-------------------- 以下方法可以连续播放该电影

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

if (!documentsDirectory) {

    NSLog(@"Documents directory not found!");

}

NSArray *myWords = [videoString componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"/"]];


NSString *appFile = [documentsDirectory stringByAppendingPathComponent:[myWords lastObject]];

NSLog(@"%@",[myWords lastObject]);

NSURL *url = [NSURL fileURLWithPath:appFile];

self.videoMPPlayer =[[MPMoviePlayerController alloc] initWithContentURL:url];

    self.videoMPPlayer.view.frame = CGRectMake(0, 0, 320, 480);

    self.videoMPPlayer.scalingMode = MPMovieScalingModeAspectFill;

    self.videoMPPlayer.controlStyle = MPMovieControlStyleNone;


    // Register for the playback finished notification

    [[NSNotificationCenter defaultCenter] addObserver:self  selector:@selector(movieLoadStateChanges:) name:MPMoviePlayerLoadStateDidChangeNotification object:videoMPPlayer];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(myMovieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:videoMPPlayer];


// Movie playback is asynchronous, so this method returns immediately.
[self.videoMPPlayer play];