我有一个UIWebView子类,我曾经玩过YouTube和本地视频.在iOS6下完美工作.在升级到iOS7时,遇到一个问题,我真的不知道从哪里开始.虽然该子类似乎仍然可以在iOS7模拟器上播放YouTube和本地视频,但当我在设备上播放YouTube时,我会收到以下消息：
Sep 26 10:17:27 JRR-IPad SVOx[558] <Error>: CGContextSaveGState: invalid context 0x0. This is a serious error. This application,or a library it uses,is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update. Sep 26 10:17:27 JRR-IPad SVOx[558] <Error>: CGContextSetBlendMode: invalid context 0x0. This is a serious error. This application,is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update. Sep 26 10:17:27 JRR-IPad SVOx[558] <Error>: CGContextSetAlpha: invalid context 0x0. This is a serious error. This application,is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update. Sep 26 10:17:27 JRR-IPad SVOx[558] <Error>: CGContextTranslateCTM: invalid context 0x0. This is a serious error. This application,is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update. Sep 26 10:17:27 JRR-IPad SVOx[558] <Error>: CGContextScaleCTM: invalid context 0x0. This is a serious error. This application,is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update. Sep 26 10:17:27 JRR-IPad SVOx[558] <Error>: CGContextGetCTM: invalid context 0x0. This is a serious error. This application,is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update. Sep 26 10:17:27 JRR-IPad SVOx[558] <Error>: CGContextDrawImage: invalid context 0x0. This is a serious error. This application,is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update. Sep 26 10:17:27 JRR-IPad SVOx[558] <Error>: CGContextGetCTM: invalid context 0x0. This is a serious error. This application,is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
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这只发生在设备上,而不是在模拟器上,并且在iOS6下没有发生.我在这里看到一些帖子谈论测试版上的各种类似的问题,但是我没有看到有关iOS7发行版的评论.
我没有在我的代码中使用任何这些方法,所以这些消息是源自于库.
任何人？ TIA.
解决方法
使用这个你可以在你的视图中运行YouTube视频..
UIWebView * videoView = [[UIWebView alloc] initWithFrame：self.view.bounds];
NSString *strparse = [NSString stringWithFormat:@"http://www.youtube.com/watch?v=%@",youtubeVideoId];
NSRange rng = [strparse rangeOfString: @"watch?v="];
strparse = [strparse substringFromIndex:rng.location];
rng = [strparse rangeOfString:@"&feature="];
if (rng.length >0)
{
strparse = [strparse substringToIndex:rng.location];
}
strparse = [strparse stringByReplacingOccurrencesOfString:@"watch?v=" withString:@""];
//http://www.youtube.com/embed/FJkiwbqlSy0
NSString *youTubeVideoHTML =[NSString stringWithFormat:@"<!DOCTYPE html><html><head><style>body{margin:0px 0px 0px 0px; background:#1111}</style></head> <body> <div id=\"player\"></div> <script> var tag = document.createElement('script'); tag.src = \"http://www.youtube.com/player_api\"; var firstScriptTag = document.getElementsByTagName('script')[0]; firstScriptTag.parentNode.insertBefore(tag,firstScriptTag); var player; function onYouTubePlayerAPIReady() { player = new YT.Player('player',{ width:'%0.0f',height:'%0.0f',videoId:'%@',events: { 'onReady': onPlayerReady,'onStateChange': onPlayerStateChange } });} function onPlayerReady(event) { event.target.playVideo(); } function onPlayerStateChange(event) {if(event.data === 0) { event.target.destroy(); }} </script> </body> </html>",0.0,youtubeVideoId];
videoView.scalesPageToFit=NO;
videoView.mediaPlaybackRequiresUserAction=NO;
videoView.backgroundColor = [UIColor clearColor];
videoView.opaque= NO;
[SharedObj showLoadingWithText:@""];
[videoView loadHTMLString:youTubeVideoHTML baseURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://www.youtube.com/watch?v=%@",youtubeVideoId]]];
[self.view addSubview:videoView];
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