How to detect when the cast device available?

[Blurzschyter]

Hi, i just starting to explore and try to develop this google cast functionality in my app.
I planned to make the cast button float and display only when there are at least 1 cast device available(refer below image) and automatically hide when there is no cast device available.

But when I set my float uibutton to GCKUICastButton subclass, the button still appear although there is no device available(refer below image).

Appreciate anyone advice and help on this matter. Thank you ^_^

[vpunjabi]

Can you try creating your own cast button instead of using the GCKUICastButton and then handle discovery and visibility yourself.

[OmarJalil]

@vpunjabi How are you handling discovery by yourself? I'm trying to use GCKDeviceProvider but it keeps crashing when I try to access .devieces