iphone:如何使用 MPMoviePlayer 在应用程序中流式传输和播放 YouTube 视频？

Question

我想制作一个像这样的YouTube应用程序(Youtube Stream)http://itunes.apple.com/us/app/youtube-stream/id384383425?mt=8#适用于 iPhone 的应用程序，其中一些视频是从 YouTube 流式传输/下载的，并在同一应用程序中播放，而无需启动 iPhone 的 YouTube 应用程序。我搜索了很多，但找不到关于如何做到这一点的线索..有人可以提出解决方案吗...

Answer 1

我找到了一种在 iPhone 应用程序内流式传输/播放 YouTube 视频的方法，但我不知道苹果会识别它或其根据 YouTube 条款和条件。下面我附上我的 .h 和 .m 文件，请检查并说明它是如何工作的..

YoutubePlayerViewController.h

#import<UIKit/UIKit.h>
#import<MediaPlayer/MediaPlayer.h>

@interface YoutubePlayerViewController : UIViewController
{
    UITextField *yurl;  
    NSMutableData *responseData;
    NSString *cacheLink;
    MPMoviePlayerController *moviePlayer;

}

@property(nonatomic,retain)IBOutlet UITextField *yurl;
@property(nonatomic,retain)NSString *cacheLink;

-(IBAction)Play:(id)sender;
-(IBAction)removeKeyboard;
@end 

//-------------------------------------------------------- -----------------------------------

//YoutubePlayerViewController.m

#import "YoutubePlayerViewController.h"

@implementation YoutubePlayerViewController
@synthesize yurl,cacheLink;


// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"view did load");
}


-(IBAction)removeKeyboard
{

    [yurl resignFirstResponder];

}

-(IBAction)Play:(id)sender
{

    //1.get the url
    NSString *url=yurl.text;
    //NSString *url=@"http://www.youtube.com/watch?v=t2o5MhaSWRs";
    //2.show loding view

    //3.make http request
    responseData = [[NSMutableData data] retain];
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
    [[NSURLConnection alloc] initWithRequest:request delegate:self];





    //3.parse jason string for itag=18
    //5.create an NSURL with that string
    //6.start the player with url

}



- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    NSLog(@"did receving response");
    [responseData setLength:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
{
    //NSLog(@"receving data");
    [responseData appendData:data];

}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error 
{
    NSLog(@"Connection failed: %@", [error description]);
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{
    NSLog(@"%d",responseData.length);
    NSString* strServerResponse= [[NSString alloc]initWithData:responseData encoding:NSASCIIStringEncoding];

    NSLog(@"%@",strServerResponse);
    NSLog(@"\n***********************************************\n");

    NSArray *temp=[strServerResponse componentsSeparatedByString:@"swfConfig"];
    strServerResponse=[temp objectAtIndex:1];

    temp=[strServerResponse componentsSeparatedByString:@".c.youtube.com,18|"];
    strServerResponse=[temp objectAtIndex:1];

    temp=[strServerResponse componentsSeparatedByString:@"||"];
    strServerResponse=[temp objectAtIndex:0];

    strServerResponse=[strServerResponse stringByReplacingOccurrencesOfString:@"\\" withString:@""];
    NSLog(@"%@",strServerResponse);
    self.cacheLink=strServerResponse;


    UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"link" message:self.cacheLink delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil];
    [alert show];
    [alert release];

    NSURL *url=[[NSURL alloc] initWithString:self.cacheLink];
    moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
    [self.view addSubview:moviePlayer.view];
    moviePlayer.view.frame = CGRectMake(5,150,310,230);  
    moviePlayer.view.backgroundColor=[UIColor blackColor];
    [moviePlayer play]; 

    [connection release];
}              


/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [super dealloc];
}

@end