试试这个代码

var path: String = NSBundle.mainBundle().pathForResource("nameOfFile", ofType: "svg")!

        var url: NSURL = NSURL.fileURLWithPath(path)  //Creating a URL which points towards our path

       //Creating a page request which will load our URL (Which points to our path)
        var request: NSURLRequest = NSURLRequest(URL: url)
       webView.loadRequest(request)  //Telling our webView to load our above request