Summary:
When `[RCTReconnectingWebSocket stop]` is called and `[RCTReconnectingWebSocket reconnect]` is scheduled afterwards (i.e. connection didn't happen before `[RCTReconnectingWebSocket stop]` being invoked), it will keep reconnecting forever.
Also fixes retain loop in block within `[RCTReconnectingWebSocket reconnect]`. When RCTReconnectingWebSocket is stopped and reference to it set to nil, block in reconnect will still keep self alive and reconnecting forever.
I found this edge case when I tried to stop RCTPackagerConnection after some time, so it doesn't spam with `[] nw_socket_handle_socket_event [C34585.1:1] Socket SO_ERROR [61: Connection refused]` when we don' have Metro running (we have brownfield app, so iOS devs don't need Metro running most of the time).
## Changelog
[iOS] [Fixed] - RCTReconnectingWebSocket is reconnecting infinitely when stopped before getting connected
Pull Request resolved: https://github.com/facebook/react-native/pull/26864
Test Plan:
- Put breakpoint into `[RCTReconnectingWebSocket reconnect]`
- Start sample RN app **without having Metro running**
- Into AppDelegate add something like
```objc
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[RCTPackagerConnection.sharedPackagerConnection stop]
});
```
- After the previous block is dispatched reconnect should not be invoked anymore
Reviewed By: motiz88
Differential Revision: D19767742
Pulled By: rickhanlonii
fbshipit-source-id: dabb2369b06217b961e9d2611257c106d350f70c
0d4b0e9417