ios - 从网站静默获取网站标题

Question

我有一个网站的链接，我想得到它的标题。我试着用这段代码来做

UIWebView* hiddenWebView;
NSString* urlString = @"http://www.youtube.com/watch?v=OyORxdjGtlk";
            NSURL* url = [NSURL URLWithString:urlString];
            NSURLRequest* request = [NSURLRequest requestWithURL:url];
            [hiddenWebView loadRequest:request];

NSString* text = [hiddenWebView stringByEvaluatingJavaScriptFromString:@"document.title"];

但结果是:text = NULL;我只想获取视频的名称

Answer 1

将 UIWebView 委托(delegate)设置为您的 ViewController(例如通过在 Interface Builder 中按住 ctrl 键拖动)，然后:

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    NSURL *url = [webView.request mainDocumentURL];
    NSString *str = [url absoluteString];
    NSString *title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
    NSLog(@"%s: url=%@ str=%@ title=%@", __PRETTY_FUNCTION__, url, str, title);
}