如何添加：查看文档时在UIWebview中“打开”其他应用程序选项（iOS Swift）

I was wondering if anyone could show me what code I need to implement to make my webview present options when viewing a document. Currently now I have a simple View controller with a webView taking up the entire view. It works fine and can display the documents but thats it. Shown below is an image from the safari iOS App that has the functionality I'm looking for.I was wondering if anyone could show me what co