Controlling UIWebView - ios

Question

In my IOS app i am using a webview to play audio from my website. My problem is that webview plays automatically when i don't even click on the webview. It says in the ios docs that mediaPlaybackRequiresUserAction is equal to true by default but it still plays. I have tried even setting mediaPlaybackRequiresUserAction to true in my code but that still doesn't solve the problem. I need to stop it from playing without user action because when the user goes to the next screen the webview automatically plays the audio. I have looked around on stack overflow and none of the solutions i found seem to help with this problem.
Here is my code:
//function to get NSURLrequest
func configureView() -> NSURLRequest {
let fileNameDownload: AnyObject = self.detailItem!
let fileNameURL = (fileNameDownload as NSString)
let spaces = fileNameURL.componentsSeparatedByString(" ")
if (spaces.count > 0) {
let fileNameURL = fileNameURL.stringByReplacingOccurrencesOfString(" ", withString: "%20", options: NSStringCompareOptions.LiteralSearch, range: NSMakeRange(0, fileNameURL.length))
println(fileNameURL)
let url = NSURL(string: fileNameURL)
let request = NSURLRequest(URL: url!)
return request
}
else {
let url = NSURL(string: fileNameURL)
let request = NSURLRequest(URL: url!)
return request
}
}
override func viewDidLoad() {
super.viewDidLoad()
previewWebView.loadRequest(configureView())
}