iOS - 如何检查是否存在模态视图 [英] iOS - How to check if a modal view is present

问题描述

有没有办法检查是否存在模态视图？我想仅在存在模态视图时才运行方法。此外，如果我有多个模态视图，有没有办法检查是否存在某个模态视图。

Is there a way to check if a modal view is present? I'd like to run a method only if a modal view is present. Also, if I have multiple modal views, is there a way to check if a certain modal view is present.

我使用以下代码来显示和关闭模态视图：

I use the following code to present and dismiss modal views:

    [self presentModalViewController:myModalView animated:YES];
    [self dismissModalViewControllerAnimated:YES];

提前谢谢！

干杯，
Evan

Cheers, Evan

PS。我的模态视图有一个视图控制器，但我想检查模态视图是否存在于异步运行的单独类中。

PS. My modal view has a view controller, but I'd like to check if the modal view is present from a separate class that is running asynchronously.

推荐答案

您是否从父视图控制器检查模态视图控制器的存在？如果是这样，你可以检查视图控制器的modalViewController属性：

Are you checking the presence of a modal view controller from the parent view controller? If so, you can just check that view controller's modalViewController property:

BOOL modalPresent = (self.modalViewController);

如果要检查特定的模态视图控制器，可以获取模态视图控制器的类名像这样：

If you want to check for a particular modal view controller, you can get the modal view controller's class name like this:

NSString *modalClassName = NSStringFromClass([self.modalViewController class]);

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