audio.play 不工作

Question

我尝试在我的应用程序中播放音频时收到 "upvalue error"。我有 2 个文件：

sound_board.lua

local enemy_damaged = audio.loadSound( "assets/audio/enemy_damaged.wav" )
local ouch = audio.loadSound( "assets/audio/ouch.wav" )
local pew = audio.loadSound( "assets/audio/pew.wav" )

local function playSound(to_play)
    audio.play( to_play )
end

level1.lua

local sound_board = require("sound_board")

-- some code
function fireSinglebullet()
    sound_board:playSound(pew) -- line 295

    -- some other code
end

启动时出现此错误：

level1.lua:295: attempt to index upvalue 'sound_board' (a boolean value)

怎么了？

Answer 1

仔细查看 return 在 sound_board.lua 文件中的内容。错误消息告诉 level.lua 中的局部变量 sound_board 是一个布尔值。

要从另一个文件访问变量，请使用这样的模块：

-- sound_board.lua

local M = {}

M.sounds = { 
  "enemy_damaged" = audio.loadSound( "assets/audio/enemy_damaged.wav" )
  "ouch" = audio.loadSound( "assets/audio/ouch.wav" )
  "pew" = audio.loadSound( "assets/audio/pew.wav" )
}

function M:playSound( to_play )

    audio.play( self.sounds[to_play] )

end

return M

和

-- level1.lua

local sound_board = require( "sound_board" )

-- some code
function fireSinglebullet()

    sound_board:playSound( "pew" ) -- line 295

    -- some other code
end

阅读更多：External Modules in Corona

audio.play 不工作

audio.play not working

lua

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