NSString *path = [[NSBundle mainBundle] pathForResource:@"ad_type = 4" ofType:@"html"];
    NSString *htmlStr = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    if (htmlStr != nil && [htmlStr rangeOfString:@"\\"].location != NSNotFound) {
        htmlStr = [htmlStr stringByReplacingOccurrencesOfString:@"\\" withString:@""];
    }

    UIWebView *web = [[UIWebView alloc]initWithFrame:CGRectMake(0, 0, 320, 50)];
    [web loadHTMLString:htmlStr baseURL:nil];
    [self.view addSubview:web];