检查WebView Swift是否有效

我想在将videourlembedded到我的webView之前检查videourl是否工作。 因为如果用户input的URL不能parsing或包含video，那么webView将显示一个白盒

// (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UIApplication canOpenURL检查URL

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