iOS6上的YouTube视频播放功能已损坏（在iOS5上正常运行） [英] YouTube video playback broken on iOS6 (works fine on iOS5)
问题描述
在我的应用程序中，我有一个按钮，当按下该按钮时，可以让您观看YouTube视频（电影预告片）。在应用程序内，没有启动safari。您可以在下面看到代码段。这个代码在iOS5下运行正常。但是，在iOS 6中，findButtonInView中的UIButton始终为nil。任何想法可能是什么原因？
In my app, I have a button which, when pressed, lets you watch a youtube video (a movie trailer). Within the app, without launching safari. Below you can see a code snippet. This code works pefrectly fine under iOS5. However, in iOS 6, the UIButton in findButtonInView is always nil. Any ideas what might be the reason?
youtubeWebView.delegate = self;
youtubeWebView.backgroundColor = [UIColor clearColor];
NSString* embedHTML = @" <html><head> <style type=\"text/css\"> body {background-color: transparent; color: white; }</style></head><body style=\"margin:0\"><embed id=\"yt\" src=\"%@?version=3&app=youtube_gdata\" type=\"application/x-shockwave-flash\"width=\"%0.0f\" height=\"%0.0f\"></embed></body></html>";
NSURL *movieTrailer;
if(tmdbMovie) movieTrailer = tmdbMovie.trailer;
else movieTrailer = [NSURL URLWithString:movie.trailerURLString];
NSString *html = [NSString stringWithFormat:embedHTML,
movieTrailer,
youtubeWebView.frame.size.width,
youtubeWebView.frame.size.height];
[youtubeWebView loadHTMLString:html baseURL:nil];
[self addSubview:youtubeWebView];
- (void)webViewDidFinishLoad:(UIWebView *)_webView {
isWatchTrailerBusy = NO;
[manager displayNetworkActivityIndicator:NO];
//stop the activity indicator and enable the button
UIButton *b = [self findButtonInView:_webView];
//TODO this returns null in case of iOS 6, redirect to the youtube app
if(b == nil) {
NSURL *movieTrailer;
if(tmdbMovie) {
movieTrailer = tmdbMovie.trailer;
} else {
movieTrailer = [NSURL URLWithString:movie.trailerURLString];
}
[[UIApplication sharedApplication] openURL:movieTrailer];
} else {
[b sendActionsForControlEvents:UIControlEventTouchUpInside];
}
}
- (UIButton *)findButtonInView:(UIView *)view {
UIButton *button = nil;
if ([view isMemberOfClass:[UIButton class]]) {
return (UIButton *)view;
}
if (view.subviews && [view.subviews count] > 0) {
for (UIView *subview in view.subviews) {
button = [self findButtonInView:subview];
if (button) return button;
}
}
return button;
}
推荐答案
Apple更改了YouTube视频的显示方式在iOS6中处理。我也使用了findButtonInView方法但不再有效。
Apple changed how YouTube videos are handled in iOS6. I also was using the findButtonInView method but that no longer works.
我发现以下内容似乎有效（在iOS< 6中未经测试）：
I've discovered the following seems to work (untested in iOS < 6):
- (void)viewDidLoad
{
[super viewDidLoad];
self.webView.mediaPlaybackRequiresUserAction = NO;
}
- (void)playVideo
{
self.autoPlay = YES;
// Replace @"y8Kyi0WNg40" with your YouTube video id
[self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@%@", @"http://www.youtube.com/embed/", @"y8Kyi0WNg40"]]]];
}
// UIWebView delegate
- (void)webViewDidFinishLoad:(UIWebView *)webView {
if (self.autoPlay) {
self.autoPlay = NO;
[self clickVideo];
}
}
- (void)clickVideo {
[self.webView stringByEvaluatingJavaScriptFromString:@"\
function pollToPlay() {\
var vph5 = document.getElementById(\"video-player\");\
if (vph5) {\
vph5.playVideo();\
} else {\
setTimeout(pollToPlay, 100);\
}\
}\
pollToPlay();\
"];
}
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