Static instance become null while another client disconnected.

[remote pivot]

Just set a static var in class, didn't set null in anywhere, assign at OnStartClient in NetworkBehaviour. when client connect to host, its all normal, but once a client disconnected. the static var will be null. that's odd.

Here's the code https://pastie.io/zozcbh.cs.

[polar cairn]

Not unexpected...when client disconnects, all networkbehaviours are destroyed, all runtime spawned networked objects destroyed, making your static ref null.

[remote pivot]

Okay, i must miss something Thanks

[remote pivot]

wait.i mean,there are host,client A and client B.they are all connected.when client B disconnected, _instance in client A become null.will the disconnection of client B affect local static variable of client A?

[polar cairn]

No, but the more I look at your code the more I realize this is over-centralization. Much of this should be SyncVars and hooks in a component on the player object, not a separate object for each client besides the player object.

[remote pivot]

OK,I try another way

[polar cairn]

Look at the Basic example that comes with Mirror. Same principal. Each player object has a component that feeds the shared scene UI. UI fragment is part of it, but SyncVar for Ready, char choice, etc. with hooks can feed that too.

[remote pivot]

I want to decentralize the player information so that it can behave differently in different scenes. However, I generated a corresponding CustomRoomAnnouncer for each player in one scene, which seems like too much. Now I'm trying to generate one CustomRoomAnnouncer per scene, so that the player's data in that scene is managed by a singleton on that server, rather than having one singleton per player.
Yes, you are right, I should use more such like SyncVar SyncList SyncDictionary.

[remote pivot]

I changed the code. Using SyncVar is indeed much cleaner.
https://pastie.io/ifqcox.cs