检查WebView Swift是否有效

Question

我想在将视频网址嵌入我的webView之前检查视频网址是否有效.因为如果用户输入的网址无法解析或包含视频,则webView将显示白盒

  // (if MyVariables.link is valid)
  {....
  let Code:NSString = "<iframe width=\(width) height=\(height) src=\(MyVariables.link)  frameborder=\(frame)></iframe>";
  self.wView.loadHTMLString(Code as String, baseURL: nil)
  }

Answer 1

使用canOpenURLfrom 检查URLUIApplication

 if let url = NSURL(string: yourUrlString) {
    var canOpen = UIApplication.sharedApplication().canOpenURL(url)
 }