Does it support OC calls?

[smallevil]

My code is written in OC. There are pictures that need to use this function.
Can OC be called? Are there any examples?
thanks

[smallevil]

When I use swift, pictures cannot be screencast.
But when I call with oc, I use the following statement:
[self.view addSubview:(ShyView*)imageView ? (ShyView*)imageView : imageView];
It works fine, but still able to take screenshots.
Where did I spell it wrong?