main.lua:45:尝试索引全局';heroClass';(一个nil值)堆栈回溯:main.lua:45:在主块中
我不熟悉这一点,并且试图从heroClass子类中创建一个新的英雄 CharacterClass.lua中的代码:main.lua:45:尝试索引全局';heroClass';(一个nil值)堆栈回溯:main.lua:45:在主块中,lua,coronasdk,Lua,Coronasdk,我不熟悉这一点,并且试图从heroClass子类中创建一个新的英雄 CharacterClass.lua中的代码: local CharacterClass = { name = " ", hp = " ", velocity = " "; } function CharacterClass:new(o, nameCharacter, hpCharacter, velocityCharacter) local o = o or {} setmetatable( o, self
local CharacterClass =
{
name = " ",
hp = " ",
velocity = " ";
}
function CharacterClass:new(o, nameCharacter, hpCharacter, velocityCharacter)
local o = o or {}
setmetatable( o, self )
self.__index = self
self.name = nameCharacter
self.hp = hpCharacter
self.velocity = velocityCharacter
return o
end
-- CREATING HERO INHERIT
local heroClass = CharacterClass:new()
function heroClass:new (o, name, hp, velocity, playerId, color)
local o = o or CharacterClass:new(o, name, hp, velocity)
setmetatable(o, self)
self.__index = self
return o
end
main.lua中的代码
local CharacterClass = require( "CharacterClass" )
local heroClassMain = heroClass:new()
在我运行代码之后,我得到了这个错误
main.lua:45: attempt to index global 'heroClass' (a nil value) stack traceback: main.lua:45: in main chunk
PS:当我在main中创建一个新的CharacterClass时,它工作得非常好,但是当我尝试创建一个新的heroClass(子类)时,我收到了错误
有人知道怎么了吗?谢谢大家! 修改您的
CharacterClass.lua
如下:
local CharacterClass = {
name = " ",
hp = " ",
velocity = " ",
}
function CharacterClass:new(o, nameCharacter, hpCharacter, velocityCharacter)
-- same as before
end
-- CREATING HERO INHERIT
local heroClass = CharacterClass:new()
function heroClass:new (o, name, hp, velocity, playerId, color)
-- same as before
end
return {heroClass = heroClass, CharacterClass = CharacterClass }
现在,当您在main.lua
中使用require时,需要做更多的工作:
local classModule = require "CharacterClass"
local CharacterClass, heroClass = classModule.CharacterClass, classModule.heroClass
local heroClassMian = heroClass:new()
以前,您的heroClass
子类没有提供给main.lua
文件。这就是导致错误回溯的原因