Instead of web pages, we can also load the document files into iOS WebView like .pdf, .txt, .doc etc.. loadData method is used to load NSData into webview.

Swift

//Assuming there is a text file in the project named "home.txt".
let localFilePath = NSBundle.mainBundle().pathForResource("home", ofType:"txt");
let data = NSFileManager.defaultManager().contentsAtPath(localFilePath!);
webview.loadData(data!, MIMEType: "application/txt", textEncodingName:"UTF-8" , baseURL: NSURL())

Objective-C

//Assuming there is a text file in the project named "home.txt".
NSString *localFilePath = [[NSBundle mainBundle] pathForResource:@"home" ofType:@"txt"];
NSData *data = [[NSFileManager defaultManager] contentsAtPath:localFilePath];
[webview loadData:data MIMEType:@"application/txt" textEncodingName:@"UTF-8" baseURL:[NSURL new]];