ios7 UIWebView Youtube Video

Question

I have a UIWebView subclass that I used to play both youtube and local videos. Worked perfectly under iOS6. In upgrading to iOS7 I've encountered a problem I don't really know where to start on. While the subclass seems to still work fine playing youtube and local video on the iOS7 simulator, when I play a youtube on the device I get the following messages logged:

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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This happens only on the device, not on the simulator, and did not occur under iOS6. I've seen some posts here talking about similar problems with various classes on the beta, but I've not seen comments about the iOS7 release version.

I do not use any of these methods in my code, so these messages are originating within libraries.

Anyone? TIA.

Answer 1

Using this you can run youtube video in your view..

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, 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];

Answer 2

This is the tested code in IOS7 , its working fine

[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];

}