是否可以在没有触摸的情况下与UIWebView交互？

Question

我正在尝试与UIWebView中的加载页面进行交互而不触摸屏幕.我尝试过mediaplaybackrequiresuseraction没有成功.我也试过这里提供的方法,但显然它在ios 6中不起作用.我正在尝试加载这个 url并让播放器开始播放.有谁知道如何使这项工作ios 6？任何帮助是极大的赞赏.

我的代码

 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {


  int storyIndex = [indexPath indexAtPosition: [indexPath length] - 1];

  NSString * storyLink = [[stories objectAtIndex: storyIndex] objectForKey: @"link"];
  //storyLink is various form of http://link.brightcove.com/services/player/bcpid1683318714001?bckey=AQ~~,AAAAC59qSJk~,vyxcsD3OtBPHZ2UIrFX2-wdCLTYNyMNn&bclid=1644543007001&bctid=2238216269001 with different bctid=value

  NSURL *kitcoURL = [NSURL URLWithString:storyLink];
  NSURLRequest *requestURL = [NSURLRequest requestWithURL:kitcoURL];
  [videoScreen setUserInteractionEnabled:YES];
  [videoScreen setMediaPlaybackRequiresUserAction:NO];
  [videoScreen loadRequest:requestURL];

 }

//方法在ios6中不起作用

 - (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;
}

- (void)webViewDidFinishLoad:(UIWebView *)_webView {
  UIButton *b = [self findButtonInView:_webView];
  [b sendActionsForControlEvents:UIControlEventTouchUpInside];
 }

编辑// videoScreen是我的UIWebView

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

NSString *urlString = @"http://link.brightcove.com/services/player/bcpid1683318714001?bckey=AQ~~,AAAAC59qSJk~,vyxcsD3OtBPHZ2UIrFX2-wdCLTYNyMNn&bclid=1644543007001&bctid=2238216269001";

NSError *error;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"bckey=([^&]*)" options:0 error:&error];
NSTextCheckingResult *match = [regex firstMatchInString:urlString options:0 range:NSMakeRange(0, urlString.length)];
NSString *bckey = [urlString substringWithRange:[match rangeAtIndex:1]];

regex = [NSRegularExpression regularExpressionWithPattern:@"bctid=([0-9]*)" options:0 error:&error];
match = [regex firstMatchInString:urlString options:0 range:NSMakeRange(0, urlString.length)];
NSString *bctid = [urlString substringWithRange:[match rangeAtIndex:1]];

NSString *newUrlString = [NSString stringWithFormat:@"http://c.brightcove.com/services/viewer/htmlFederated?&playerKey=%@&videoID=%@", bckey, bctid];

[videoScreen loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:newUrlString]]];

}

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
if (!webView.isLoading)
{
    [self checkForVideoReady];
}

}
 // Checking player object for ready. If it ready - starting video. Otherwise waiting 1 second 
- (void)checkForVideoReady
{
    if (![[videoScreen stringByEvaluatingJavaScriptFromString:@"player.ready"]   isEqualToString:@"true"])
    {
    [self performSelector:@selector(checkForVideoReady) withObject:nil afterDelay:1];
   }
   else
   {
        [videoScreen stringByEvaluatingJavaScriptFromString:@"player.videoPlayer.playButton.element.click();"];
   }
 }

Answer 1

基于 HTML 5 Youtube 视频的视图中查找按钮的方法。
我找到了解决您问题的方法，它并不优雅，但有效。

你的链接

http://link.brightcove.com/services/player/bcpid1683318714001?bckey=AQ~~,AAAAC59qSJk~,vyxcsD3OtBPHZ2UIrFX2-wdCLTYNyMNn&bclid=1644543007001&bctid=2238216269001

带有 flash 对象的下载页面。据我所知，没有办法开始使用 JS 或UIWebView.
研究完请求后，我看到了UIWebView另一个 url 的查询：

http://c.brightcove.com/services/viewer/htmlFederated?&width=966&height=546&flashID=myExperience&bgcolor=%23FFFFFF&playerID=1683318714001&playerKey=AQ~~%2CAAAAC59qSJk~%2CvyxcsD3OtBPHZ2UIrFX2-wdCLTYNyMNn&isVid= true&isUI=true&dynamicStreaming=true&autoStart=true&debuggerID=&videoID= 2238216269001&%40videoPlayer=2238216269001&lineupID=1644543007001&startTime=1364279975091&refURL=不%20可用&%40videoPlayer=2238216269001

第二个更有趣，因为我们可以player使用 JavaScript 访问变量并启动视频。

所以我们需要转换初始URL。看起来 URL 中只有 2 个重要参数 -bckey和bctid：

NSString *urlString = @"http://link.brightcove.com/services/player/bcpid1683318714001?bckey=AQ~~,AAAAC59qSJk~,vyxcsD3OtBPHZ2UIrFX2-wdCLTYNyMNn&bclid=1644543007001&bctid=2238216269001";

NSError *error;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"bckey=([^&]*)" options:0 error:&error];
NSTextCheckingResult *match = [regex firstMatchInString:urlString options:0 range:NSMakeRange(0, urlString.length)];
NSString *bckey = [urlString substringWithRange:[match rangeAtIndex:1]];

regex = [NSRegularExpression regularExpressionWithPattern:@"bctid=([0-9]*)" options:0 error:&error];
match = [regex firstMatchInString:urlString options:0 range:NSMakeRange(0, urlString.length)];
NSString *bctid = [urlString substringWithRange:[match rangeAtIndex:1]];

NSString *newUrlString = [NSString stringWithFormat:@"http://c.brightcove.com/services/viewer/htmlFederated?&playerKey=%@&videoID=%@", bckey, bctid];

并加载新的URL

[_webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:newUrlString]]];

URL 加载后我们就可以访问player对象了。该对象可以判断视频何时准备好播放并开始播放

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    if (!webView.isLoading)
    {
        [self checkForVideoReady];
    }

}
// Checking player object for ready. If it ready - starting video. Otherwise waiting 1 second 
- (void)checkForVideoReady
{
    if (![[_webView stringByEvaluatingJavaScriptFromString:@"player.ready"] isEqualToString:@"true"])
    {
        [self performSelector:@selector(checkForVideoReady) withObject:nil afterDelay:1];
    }
    else
    {
        [_webView stringByEvaluatingJavaScriptFromString:@"player.videoPlayer.playButton.element.click();"];
    }
}

我知道这并不优雅，也许有人会找到改进的方法。
欢迎发表评论。