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];
}
}
