iphone – 如何使用MPMoviePlayerController播放视频?

栏目: IOS · 发布时间: 5年前

内容简介:翻译自:https://stackoverflow.com/questions/10814308/how-to-play-video-using-mpmovieplayercontroller
我使用以下代码使用MPMoviePlayerController播放视频,但视频未播放.谁能告诉我为什么?
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"/one.mp4"];

NSString *mediaPath = [[[NSBundle mainBundle]resourcePath] stringByAppendingPathComponent:filePath];

    MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:mediaPath]];

    [[moviePlayer view] setFrame:[[self view] bounds]];
    [[self view] addSubview: [moviePlayer view]];


    moviePlayer.scalingMode = MPMovieScalingModeAspectFit;

    [moviePlayer play];

这很奇怪,但是如果你让你的MPMoviePlayerController成为一个属性而不是一个局部变量似乎没问题.似乎在幕后发生了一些事情.我认为这与ARC有关.你在用ARC吗?

这也是你过度添加路径的问题:

// You've already got the full path to the documents directory here.
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"/one.mp4"];
// Now you're appending the full path to the documents directory to your bundle path
NSString *mediaPath = [[[NSBundle mainBundle]resourcePath] stringByAppendingPathComponent:filePath];

当我在模拟器中运行代码时,路径如下所示:

/Users/mlong/Library/Application Support/iPhone  Simulator/5.1/Applications/8CFB9B94-BD6A-442C-A525-573FE343506D/VidoePlayer.app/Users/mlong/Library/Application Support/iPhone  Simulator/5.1/Applications/8CFB9B94-BD6A-442C-A525-573FE343506D/Documents/one.mp4

它应该是这样的:

/Users/mlong/Library/Application Support/iPhone  Simulator/5.1/Applications/8CFB9B94-BD6A-442C-A525-573FE343506D/Documents/one.mp4

所以只需删除此行:

NSString *mediaPath = [[[NSBundle mainBundle]resourcePath] stringByAppendingPathComponent:filePath];

然后将播放器实例化更改为:

_moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL fileURLWithPath:filePath]];

[[_moviePlayer view] setFrame:[[self view] bounds]];
[[self view] addSubview: [_moviePlayer view]];

_moviePlayer.scalingMode = MPMovieScalingModeAspectFit;

[_moviePlayer play];

因此,您应该将MPMoviePlayerController添加为包含视图控制器的属性.

翻译自:https://stackoverflow.com/questions/10814308/how-to-play-video-using-mpmovieplayercontroller


以上所述就是小编给大家介绍的《iphone – 如何使用MPMoviePlayerController播放视频?》,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持!

查看所有标签

猜你喜欢:

本站部分资源来源于网络,本站转载出于传递更多信息之目的,版权归原作者或者来源机构所有,如转载稿涉及版权问题,请联系我们

Web Scalability for Startup Engineers

Web Scalability for Startup Engineers

Artur Ejsmont / McGraw / 2015-6-23 / USD 34.81

Design and build scalable web applications quickly This is an invaluable roadmap for meeting the rapid demand to deliver scalable applications in a startup environment. With a focus on core concept......一起来看看 《Web Scalability for Startup Engineers》 这本书的介绍吧!

HTML 编码/解码
HTML 编码/解码

HTML 编码/解码

Base64 编码/解码
Base64 编码/解码

Base64 编码/解码

SHA 加密
SHA 加密

SHA 加密工具