iPhone PDF UIWebview

In my iPhone application i am trying to load the pdf file on UIWebview.. but some how it's not working. Please suggest.

Code that i used is as follow...

 NSString* filePath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"pdf"];
     NSData* data = [NSData dataWithContentsOfFile:filePath];

     [self.webView 
      loadData:data
      MIMEType:@"application/pdf"
      textEncodingName:@"UTF-8"
      baseURL:nil];