ios - iOS Check ViewController是否具有ChildViewController？

Question

当viewController有任何ChildViewController时，我想做些事情。

我正在使用下面的代码添加子viewController:

ParentVC *parentVC = [self.storyboard instantiateViewControllerWithIdentifier:@"IDParentVC"];

ChildVC *childVC = [self.storyboard instantiateViewControllerWithIdentifier:@"IDChildVC"];

[childVC.view setFrame:CGRectMake(0,self.view.frame.size.height, self.view.frame.size.width, self.view.frame.size.height)];
[parentVC addChildViewController:childVC];
[parentVC.view addSubview:childVC.view];
[childVC didMoveToParentViewController:parentVC];

现在如何检查ParentVC是否具有ChildVC？

Answer 1

你可以这样

for (UIViewController *child in parentVC.childViewControllers) {
    if ([child isKindOfClass:[childVC class]) {
        //your ChildVC here
    }
}

希望这个帮助