HTML 파일을 리소스로 두고 웹뷰에서 읽어서 로드하기.

// Load the html as a string from the file system
NSString *path = [[NSBundle mainBundle]
    pathForResource:@"index" ofType:@"html"];

NSString *html = [[NSString alloc] initWithContentsOfFile:path
    encoding:NSUTF8StringEncoding error:nil];

// Tell the web view to load it
[WebView loadHTMLString:html
    baseURL:[[NSBundle mainBundle] bundleURL]];

[출처] http://stackoverflow.com/questions/4645414/how-can-i-load-a-local-html-file-into-the-uiwebview