iOS pop控制器

//退出当前控制器
[self.navigationController popViewControllerAnimated:YES];

//返回到某个控制器
for (UIViewController *vcHome in self.navigationController.viewControllers) {

    if ([vcHome isKindOfClass:[WorkFlowViewController class]]) {
            
        [self.navigationController popToViewController:vcHome animated:YES];
    }
}