# 用Spwan AIFrom Class 节点生成的蓝图 和 Spwan ActorFromClass节点生成的蓝图在 运行游戏时 行为树中的Event Receive Execute returns PAWN却是空的？

**URL:** <https://forums.unrealengine.com/t/spwan-aifrom-class-spwan-actorfromclass-event-receive-execute-returns-pawn/455956>\
**Category:** AI\
**Tags:** unreal-engine, null, pawn, Blueprint, question\
**Created:** [September 25, 2019, 2:30pm UTC](https://forums.unrealengine.com/t/spwan-aifrom-class-spwan-actorfromclass-event-receive-execute-returns-pawn/455956 "2019-09-25T14:30:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Sakick](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Sakick](https://forums.unrealengine.com/u/Sakick)\
**Post date:** [September 25, 2019, 2:30pm UTC](https://forums.unrealengine.com/t/spwan-aifrom-class-spwan-actorfromclass-event-receive-execute-returns-pawn/455956/1 "2019-09-25T14:30:48Z")

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我用放置的方式放置蓝图在关卡中然后运行游戏时 行为树中的Event Receive Execute returns PAWN 为有值 非空。  
我用Spwan AIFrom Class 节点生成的蓝图 和 Spwan ActorFromClass节点生成的蓝图在 运行游戏时 行为树中的Event Receive Execute returns PAWN却是空的？不知道是什么原因？