在 IOS 的 UIWebView 中播放 youtube 视频时设备中没有声音的问题

Issue with not getting sound in device when play youtube video in UIWebView in IOS(在 IOS 的 UIWebView 中播放 youtube 视频时设备中没有声音的问题)
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问题描述

我正在使用 UIWebView 播放 Yoytube 视频.
我的代码是这样的

I am using a UIWebView to play Yoytube Video.
My code is like that

self.webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0,320, 240)];
[self.webView setBackgroundColor:[UIColor clearColor]];
[self.webView setOpaque:NO];
self.webView.delegate=self;
[self.webView setAllowsInlineMediaPlayback:YES];
[self.webView setMediaPlaybackRequiresUserAction:NO];
[self.viewContent addSubview:self.webView];

NSString* embedHTML = [NSString stringWithFormat:@"
                                   <html>
                                   <body style='margin:0px;padding:0px;'>
                                   <script type='text/javascript' src='http://www.youtube.com/iframe_api'></script>
                                   <script type='text/javascript'>
                                   function onYouTubeIframeAPIReady()
                                   {
                                   ytplayer=new YT.Player('playerId',{events:{onReady:onPlayerReady}})
                                   }
                                   function onPlayerReady(a)
                                   { 
                                   a.target.playVideo(); 
                                   }
                                   </script>
                                   <iframe id='playerId' type='text/html' width='%d' height='%d' src='http://www.youtube.com/embed/%@?enablejsapi=1&rel=0&playsinline=1&autoplay=1' frameborder='0'>
                                   </body>
                                   </html>", 320, 240, [dictIW valueForKey:@"embedCode"]];
[self.webView loadHTMLString:embedHTML baseURL:[[NSBundle mainBundle] resourceURL]];

在模拟器中玩得非常好.但是当我在 iPhone 或 iPad 上播放此视频时,视频正在播放,但声音却没有.
请帮忙.

In Simulator it is playing absolutely fine. But when I play this video in iPhone or iPad, the video is showing, but the sound is not getting.
please help.

推荐答案

在创建 UIWebView 之前将音频会话类别设置为播放"

Set the audio session category to 'playback' before creating the UIWebView

AVAudioSession *audioSession = [AVAudioSession sharedInstance];
BOOL flag;
NSError *setCategoryError = nil;
flag = [audioSession setCategory:AVAudioSessionCategoryPlayback
                     error:&setCategoryError];

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