如何判断UIViewController是使用pop，dismiss返回到上级视图控制器

来源：互联网发布：mysql employees 导入编辑：程序博客网时间：2024/06/07 23:42

当我们自定义继承UIViewController视图控制器的基类视图控制器时，会新增返回到上级的视图控制器方法，于是就要区分，返回时使用 pop 的方法，还是使用dismiss 的方法了。

方法1

- (void)backPreviousController{    if (self.presentingViewController)     {        [self dismissViewControllerAnimated:YES completion:nil];    }     else     {        [self.navigationController popViewControllerAnimated:YES];    }}

方法2

- (void)backPreviousController{    if (self.navigationController.topViewController == self)    {        [self.navigationController popViewControllerAnimated:YES];    }     else     {        [self dismissViewControllerAnimated:YES completion:nil];    }}

方法3

- (void)backPreviousController{    if ([self.navigationController.viewControllers.firstObject isEqual:self])    {        [self dismissViewControllerAnimated:YES completion:nil];    }    else    {        [self.navigationController popViewControllerAnimated:YES];    }}

- (void)backPreviousController{    if ([self.navigationController.viewControllers indexOfObject:self] == 0)    {        [self dismissViewControllerAnimated:YES completion:nil];    }    else    {        [self.navigationController popViewControllerAnimated:YES];    }}

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