The header files that need to be introduced are：#include "System/GlobalEventSystem.h"

1. Event Listen Bind: LISTEN_EVENT( EventTagOrId, Listener, EventName )

• EventTagOrId：The Tag or ID of the event.
  • For Tag this is an EventTag type, you can use it both in Blueprint or C++.
  • As for Id, this is an FName type, which you can only use in C++.
• Listener：The object of this event.
• EventName：The name of the function that listens for this event.

Example of use:

• Tag definition:

  

• Listen Event Tags

  

• function:

  

2. Event Notification:

• NOTIFY_EVENT( EventTagOrId, Listener, … )

• NOTIFY_EVENT_BY_SENDER( EventTagOrId, Sender, Listener, … )

• EventTagOrId：The Tag or ID of the event.

  • For Tag this is an EventTag type, you can use it both in Blueprint or C++.
  • As for Id, this is an FName type, which you can only use in C++.

• Sender：

  • 对于NOTIFY_EVENT，The default notifier is this.
  • 对于NOTIFY_EVENT_BY_SENDER，The object that needs to be passed in to notify this message.