iOS判断当前ViewController是push还是present方式显示的

方法一：通过判断self有没有present方式显示的父视图presentingViewController

- (IBAction)dismiss:(id)sender {
    if (self.presentingViewController) {
        [self dismissViewControllerAnimated:YES completion:nil];
    } else {
        [self.navigationController popViewControllerAnimated:YES];
    }
}

方法二：
通过判断self.navigationController.viewControllers的最后一个是否是当前控制器，或者self.navigationController.topViewController == self

- (IBAction)dismiss:(id)sender {

    if (self.navigationController.topViewController == self) {

        [self.navigationController popViewControllerAnimated:YES];

    } else {

        [self dismissViewControllerAnimated:YES completion:nil];

   }

}

转飞业达--iOS判断VC push or present