直接上程式碼

//設定各個ViewController的名字
    NSString *viewControllerClassName = [NSString stringWithFormat:@"ViewController%@", @(indexPath.row + 1)];
    Class viewControllerKlass = NSClassFromString(viewControllerClassName);
    //NSAssert(viewControllerKlass, @"Class should not be nil!");
    //NSAssert([viewControllerKlass isSubclassOfClass:[UIViewController class]], @"Class should be a view controller!");
 

    UIViewController *demoViewController = [[viewControllerKlass alloc] initWithNibName:nil bundle:nil];
    if (demoViewController) {
        demoViewController.title = [self textForDemoAtIndexPath:indexPath];
        [self.navigationController pushViewController:demoViewController animated:YES];
    }