試圖創建一個非常簡單的類繼承,所有對象似乎是共享相同的價值觀Lua的對象不是唯一的
這是我的代碼的簡化:
--Generic class
Object = {}
function Object:new (type,id,name)
o = {}
self.type = type or "none"
self.id = id or 0
self.name = name or "noname"
self.direction = "down"
self.animations = {}
self.animations.stack = {}
self.animations.idle = {}
self.animations.idle[self.direction] = {}
setmetatable(o, self)
self.__index = self
return o
end
function Object:draw(x,y)
local img = self.animations.idle["down"][0]
print("drawing " ..self.name.." as "..img)
end
function Object:setimg(img)
self.animations.idle["down"][0] = img
end
Player = Object:new()
-- Player class
function Player:new(id,name)
local o = self
o.id = id or 0
o.name = name or "noname"
o.collision = {}
o.collision.type = "player"
return o
end
function Player:move(x,y)
print("moving to ",x,y)
end
-- Testing
blockimg = "block.png"
grassimg = "grass.png"
plyrimg = "player.png"
block = Object:new("solid",1,"block")
block:setimg(blockimg)
grass = Object:new("floor",3,"grass")
grass:setimg(grassimg)
player = Player:new(1, "plyr1")
player:setimg(plyrimg)
block:draw() -- >drawing grass as player.png
grass:draw() -- >drawing grass as player.png
player:draw()-- >drawing plyr1 as player.png
由於球員:setimg是最後一次調用的所有「對象」以plyrimg結束,因此它們不是唯一的
該死的我真的不明白,在構造函數中啓動表沒有意義? – Mojimi
這並非毫無意義!你只需要注意你在'構造函數'中分配的_which_表 - 記住在'new'中,'self'在被稱爲'Player:new'或'Object:new'時引用_class_而不是_instance_, 。 – Oka
AAAAAAAAAAAAHHHHHHHHHH我看到了,現在我明白了,謝謝 – Mojimi