WebViewController *web = [[WebViewController alloc] initWithNibName:nil bundle:nil];
web.titleStr = @"导航栏标题";
web.requestUrl = ［NSString string];
web.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
UINavigationController * jackNavigationController = [[UINavigationController alloc] initWithRootViewController:web];
jackNavigationController.navigationBar.barTintColor = [UIColor groupTableViewBackgroundColor];
[[UIApplication sharedApplication] setStatusBarStyle : UIStatusBarStyleDefault];
[self presentViewController:jackNavigationController animated:YES completion:^{
}];
