How To Fix memory leak in in Reaact Native?

I have a problem with my application that is a memory leak, where when the application that I developed during the debugger hangs.

I have unmounted state and event

Following a warning in debugger mode:

Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in the componentWillUnmount method.
    in PTRViewAndroid (at Home.js:187)