写插件菜单时要注意大小写
{
"name": "hello-world",
"version": "0.0.1",
"description": "一份简单的扩展包",
"author": "Cocos Creator",
"main": "main.js",
"main-menu": {
"Packages/Hello World": {
"message": "hello-world:say-hello"
}
}
}
hello-world目录名必须为小写，支持-连接符
原文：https://www.cnblogs.com/slqt/p/10387369.html