Coroutine问题

Question

因此，我试图在ROBLOX中制作一个基本的GUI动画系统，使用单个框架和一个循环将它们放入图像标记中。

这是一项功能：

local playAnimation = coroutine.create(function(anim,pos,tank)
    while true do
    local animBase = sp.AnimBase:Clone()
    animBase.Parent = tank
    animBase.Visible = true
    animBase.Position = pos -- line that causes the error mentioned below.
    local frame = 1
    for i = 0, animations[anim]["FrameNum"] do
        frame = frame + 1
        animBase.Image = animations[anim]["Frames"][frame]
        NewWait(.1) --this right here, the wait, interfears with the yield.
        if frame >= animations[anim]["FrameNum"] then
            pos,anim,tank = coroutine.yield()
            break
        end
    end
    animBase:Destroy()
    end
end)

这有两个主要问题:每次运行时，我都会得到以下错误：

20:41:01.934 - Players.Player1.PlayerGui.ScreenGui.Gui-MAIN:65: bad argument #3 to 'Position' (UDim2 expected, got number)

尽管这个错误似乎没有起到任何作用。(例如，完全停止脚本)

导致错误的行被标记为注释。

我已经确认了pos是正确的。我甚至尝试在设置它之前打印它，它打印正确的东西：{0,120}，{0,65}

另一个主要的问题是我不能在使用它一次之后继续使用它。它可以多次很好地运行这一行：

coroutine.resume(playAnimation,"Cannon Fire",UDim2.new(0,120,0,68-25),tank.Frame)

但它不能运行：

if tank2:FindFirstChild("Ammo") and isTouching(ammoFrame,tank2:GetChildren()[3]) then
    local lastAmmoPos = ammoFrame.Position
    ammoFrame:Destroy()
    coroutine.resume(playAnimation,"Explosion",lastAmmoPos-UDim2.new(0,25-(ammoTypes[type]["Size"].X.Offset)/2,0,25),tank.Frame)
    tank2:GetChildren()[3]:Destroy()
end

是的，如果语句运行良好。ammoFrame被摧毁了，tank2的第三个孩子也被摧毁了。合作线就不会恢复了。

Answer 1

通过完全删除coroutine并将for循环封装在一个产卵函数中进行修正。

local playAnimation = function(anim,pos,tank)
    local animBase = sp.AnimBase:Clone()
    animBase.Parent = tank
    animBase.Visible = true
    animBase.Position = pos
    local frame = 1
    spawn(function()
        for i = 0, animations[anim]["FrameNum"] do
            frame = frame + 1
            animBase.Image = animations[anim]["Frames"][frame]
            wait(.1) --this right here, the wait, interfears with the yield.
            if frame >= animations[anim]["FrameNum"] then
                break
            end
        end
        animBase:Destroy()
    end)
end