我有一个UIWebView子类,我用它来播放youtube和本地视频.在iOS6下完美运行.升级到iOS7我遇到了一个问题,我真的不知道从哪里开始.虽然子类似乎仍能在iOS7模拟器上播放YouTube和本地视频,但当我在设备上播放youtube时,我会记录以下消息:
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, 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>: CGContextSetAlpha: 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>: CGContextTranslateCTM: 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>: CGContextScaleCTM: 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>: CGContextGetCTM: 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>: CGContextDrawImage: 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>: CGContextGetCTM: 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.
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这仅在设备上发生,而不是在模拟器上发生,并且在iOS6下不会发生.我在这里看到一些帖子谈论了关于测试版的各种类的类似问题,但我没有看到有关iOS7发布版本的评论.
我不在我的代码中使用任何这些方法,因此这些消息来自库中.
任何人？TIA.
小智 1
这是在IOS7中经过测试的代码，运行良好
[self embedYouTube:[self getYTUrlStr:@"https://www.youtube.com/watch?v=Zq4o_Ca14aw"] frame:CGRectMake(0,40,self.view.frame.size.width, self.view.frame.size.height-40)];
- (NSString*)getYTUrlStr:(NSString*)url
{
if (url == nil)
return nil;
NSString *retVal = [url stringByReplacingOccurrencesOfString:@"watch?v=" withString:@"v/"];
NSRange pos=[retVal rangeOfString:@"version"];
if(pos.location == NSNotFound)
{
retVal = [retVal stringByAppendingString:@"?version=3&hl=en_EN"];
}
return retVal;
}
- (void)embedYouTube:(NSString*)url frame:(CGRect)frame {
NSString* embedHTML = @"\
<html><head>\
<style type=\"text/css\">\
body {\
background-color: transparent;\
color: white;\
}\
</style>\
</head><body style=\"margin:0\">\
<embed id=\"yt\" src=\"%@\" type=\"application/x-shockwave-flash\" \
width=\"%0.0f\" height=\"%0.0f\"></embed>\
</body></html>";
NSString* html = [NSString stringWithFormat:embedHTML, url, frame.size.width, frame.size.height];
if(videoView == nil) {
videoView = [[UIWebView alloc] initWithFrame:frame];
videoView.delegate=self;
[self.view addSubview:videoView];
}
videoView.mediaPlaybackAllowsAirPlay=YES;
videoView.allowsInlineMediaPlayback=YES;
[videoView loadHTMLString:html baseURL:nil];
}
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