UnLua/Content/Script/Tutorials/05_BindDelegates.lua at master · Tencent/UnLua · GitHub

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--[[

说明：可以通过对委托原生接口的调用，完成对UI事件的监听

小提示：

绑定/解绑成对出现，是编写代码的良好习惯

]]--

local FLinearColor = UE.FLinearColor

local M = UnLua.Class()

function M:Construct()

self.ClickMeButton.OnClicked:Add(self, self.OnButtonClicked)

self.ClickMeCheckBox.OnCheckStateChanged:Add(self, self.OnCheckBoxToggled)

-- 相当于在蓝图中的 Set Timer by Event

self.TimerHandle = UE.UKismetSystemLibrary.K2_SetTimerDelegate({ self, self.OnTimer }, 1, true)

end

function M:OnButtonClicked()

local r = math.random()

local g = math.random()

local b = math.random()

self.ClickMeButton:SetBackgroundColor(FLinearColor(r, g, b, 1))

end

function M:OnCheckBoxToggled(on)

if on then

self.CheckBoxText:SetText("已选中")

else

self.CheckBoxText:SetText("未选中")

end

function M:OnTimer()

local seconds = UE.UKismetSystemLibrary.GetGameTimeInSeconds(self)

self.GameTimeTextBlock:SetText(string.format("游戏时长：%d 秒", math.floor(seconds)))

end

function M:Destruct()

-- 在UMG被销毁时尽量清理已绑定的委托，不清理则会在切换Map时自动清理

self.ClickMeButton.OnClicked:Remove(self, self.OnButtonClicked)

self.ClickMeCheckBox.OnCheckStateChanged:Remove(self, self.OnCheckBoxToggled)

-- 相当于在蓝图中的 Clear and Invalidate Timer by Handle

UE.UKismetSystemLibrary.K2_ClearAndInvalidateTimerHandle(self, self.TimerHandle)

end

return M

UnLua/Content/Script/Tutorials/05_BindDelegates.lua at master · Tencent/UnLua · GitHub

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