How can i make code wait until tween in other functions finishes(or wait until function return something)

[PhantomGame_Youtube (Ze_InSoRiTy)]

1. What do you want to achieve? Keep it simple and clear!
   So basically i have a code to tween any type of gui object with function in moduleScript. But i can’t make it wait until function finishes
2. What solutions have you tried so far? Did you look for solutions on the Developer Hub?
   I tryed using repeat until function return true but it not really work

Code to call function:

for i=1,length do
		
		local skipped = TalkingLabel:GetAttribute("skipped")
		if skipped	== false then
			
			TalkingLabel.Text = StoryMessages:RetrieveMessage("Beginning...", "Messages", i)
			
			local check = ClientFunctions:AdjustTransparency(TalkingLabel, 0, 250)
			repeat task.wait(0.1); print(check) until check == true
			local reverseCheck = ClientFunctions:AdjustTransparency(TalkingLabel, 1, 250)
			repeat task.wait(0.1); print(check) until reverseCheck == true
		end
	end
	

Tween Function code:

function ClientFunctions:AdjustTransparency(UI, targetTransparency, Time, requireBackground)
	
	local currentTween
	local backgroundTween
	local UIStrokeTween
	local UIType
	
	local function ChangeTransparency(UIType)

		local TimeInSeconds = Time/1000
		local tweenInfo = TweenInfo.new(TimeInSeconds, Enum.EasingStyle.Quad, Enum.EasingDirection.InOut)

		local UITransparencyProperty = string.format("%sTransparency", UIType)

		if UIType == "Text" then
			currentTween = TweenService:Create(UI, tweenInfo, {TextTransparency = targetTransparency})
		elseif UIType == "Image" then
			currentTween = TweenService:Create(UI, tweenInfo, {ImageTransparency = targetTransparency})
		elseif UIType == "Background" then
			currentTween = TweenService:Create(UI, tweenInfo, {BackgroundTransparency = targetTransparency})
		end

		if requireBackground then
			backgroundTween = TweenService:Create(UI, tweenInfo, {BackgroundTransparency = targetTransparency})
			if UI:FindFirstChild("UIStroke") then
				UIStrokeTween = TweenService:Create(UI.UIStroke, tweenInfo, {Transparency = targetTransparency})
			end
		end
	end

	if UI:IsA("TextLabel") or UI:IsA("TextButton") then
		UIType = "Text"
	elseif UI:IsA("ImageLabel") or UI:IsA("ImageButton") then
		UIType = "Image"
	elseif UI:IsA("Frame") or UI:IsA("ScrollingFrame") then
		UIType = "Background"
	end
	
	ChangeTransparency(UIType)
	
	currentTween:Play()
	if requireBackground then
		backgroundTween:Play()
		
		if UI:FindFirstChild("UIStroke") then
			UIStrokeTween:Play()	
		end
	end
	currentTween.Completed:Connect(function()
		print(1)
		return true
	end)
end

[SeargentAUS (Seargent)]

Instead of using a :Connect on the Completed event, you can instead use :Wait()

i.e.

currentTween.Completed:Wait()
task.wait(1)
return true

[PhantomGame_Youtube (Ze_InSoRiTy)]

@SeargentAUS

currentTween.Completed:Wait()
task.wait(1)
return true

Oh, it works, thanks (30 letterssssssssssss)

[alexinite (alex)]

You have to remember that return only stops the current task, return in this scenario is closing the .Completed event, not its parent.

Ouch. This code has a memory leak! Make sure to be disconnecting RBXScriptSignals like :Connect when something should be cleaned up. Here are better ways to write your .Completed event:

local connection
connection = currentTween.Completed:Connect(function()
    print(1)
    connection:Disconnect()
    return true
end)

currentTween.Completed:Once(function()
    print(1)
    return true
end)

The two above shouldn’t be used for this case specifically however because return doesn’t close the scope you’re trying to close, unless you wrapped it in a success call like a Promise. The best choice for you would be:

currentTween.Completed:Wait()
print(1)
return true