1. Declaration of custom EventTag in C++ .h file

The declaration here is similar to the declaration of GameplayTag.

• The main macros used are: UE_DECLARE_EVENT_TAG_EXTERN()
  • Parameter TagName, the name of EventTag

Example definition:

2. Definition of declared EventTag in C++ .cpp file

• Without parameters, without Tag description: UE_DEFINE_EVENT_TAG()

  

  • TagName: This is the name of the EventTag passed in as declared in the .h file.
  • Tag: This is the specific Tag name separated by ., which is used to display the name in the blueprint.

• Without parameters, with Tag description: UE_DEFINE_EVENT_TAG_COMMENT()

  

  • TagName: This is the name of the EventTag passed in as declared in the .h file.
  • Tag：This is the specific tag name separated by ., which is used to display the name in the blueprint.
  • Comment：That is, the description information of this Tag, which is used to easily check what this EventTag does in the blueprint.

• With parameters, without Tag description: UE_DEFINE_EVENT_TAG_HANDLE()

  

  • TagName: This is the name of the EventTag passed in as declared in the .h file.
  • Tag：This is the specific tag name separated by ., which is used to display the name in the blueprint.
  • Parameters：This is the parameter list of this event, mainly used for compatibility with blueprints. For specific parameter definitions, see 2. Defining EventTag parameters in C++

• With parameters and tag description: UE_DEFINE_EVENT_TAG_HANDLE_COMMENT()

  

  • TagName: This is the name of the EventTag passed in as declared in the .h file.
  • Tag：This is the specific tag name separated by ., which is used to display the name in the blueprint.
  • Parameters：This is the parameter list of this event, mainly used for compatibility with blueprints. For specific parameter definitions, see 2. Defining EventTag parameters in C++
  • Comment：That is, the description information of this Tag, which is used to easily check what this EventTag does in the blueprint.

Example definition: