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- (void)viewDidLoad {

    [super viewDidLoad];

    self.navigationItem.title = @"朱珍洁";

    self.view.backgroundColor = [UIColor purpleColor];

    

    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];

    button.frame = CGRectMake(100, 100, 200, 40);

    [button setTitle:@"返回" forState:UIControlStateNormal];

    [button addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:button];

    

    UIButton *buyBtn = [UIButton buttonWithType:UIButtonTypeSystem];

    buyBtn.frame = CGRectMake(100, 200, 200, 40);

    [buyBtn setTitle:@"购买" forState:UIControlStateNormal];

    [buyBtn addTarget:self action:@selector(buy) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:buyBtn];

    

    

    // Do any additional setup after loading the view.

}

 

//跳转到登录系统

- (void)buy {

    LoginViewController *loginVC = [[LoginViewController alloc] init];

    UINavigationController *naVC = [[UINavigationController alloc] initWithRootViewController:loginVC];

    

    naVC.modalTransitionStyle = UIModalTransitionStylePartialCurl;

    

    [self.navigationController presentViewController:naVC animated:YES completion:nil];

}

 

//点击返回按钮返回到某一级视图控制器

- (void)back {

    //1、返回到上一级视图控制器

//    [self.navigationController popViewControllerAnimated:YES];

    

    //2、返回根视图控制器

    /*

    [self.navigationController popToRootViewControllerAnimated:YES];*/

    

    //3、返回到指定的视图控制器

    UIViewController *vc = [self.navigationController.viewControllers objectAtIndex:1];

    

    [self.navigationController popToViewController:vc animated:YES];

}