Xlua 热更新 实现显示帧率

第一步：导入Xlua插件

链接： 项目目录预览 - xLua - GitCode

进入链接，下载zip，进入Asset文件，将其中所有目录导入Unity的Asset中。

第二步：创建脚本 XLuaFPSDisplay.cs 

复制粘贴以下代码，然后将脚本挂载到任意对象。

using XLua;
using UnityEngine;

public class XLuaFPSDisplay : MonoBehaviour
{
    LuaEnv luaEnv;

    void Start()
    {
        luaEnv = new LuaEnv();
        luaEnv.DoString("require('FPSDisplay').Start()");
    }

    void Update()
    {
        luaEnv.DoString("require('FPSDisplay').Update()");
    }

    void OnDestroy()
    {
        luaEnv.Dispose();
    }
}

第三步：在sublime Text或者vs中创建lua脚本  FPSDisplay.lua

复制粘贴以下代码：

local UnityEngine = CS.UnityEngine
print(UnityEngine);
local FPSDisplay = {}

print("成功加载了FPSDisplay")

-- 在Start函数中初始化计时器和帧数变量
function FPSDisplay.Start()
    FPSDisplay.deltaTime = 0.0
    FPSDisplay.updateRate = 4 -- 更新频率，每4帧更新一次
    FPSDisplay.frameCount = 0
    FPSDisplay.timePassed = 0.0

    -- 创建一个UI文本对象用来显示帧率
    local canvas = UnityEngine.GameObject.Find("Canvas");
    FPSDisplay.fpsTextObj = UnityEngine.GameObject("FPSText")
    FPSDisplay.fpsTextObj.transform:SetParent(canvas.transform)
    local rectTransform = FPSDisplay.fpsTextObj:AddComponent(typeof(UnityEngine.RectTransform))
    rectTransform.anchorMin = UnityEngine.Vector2.zero
    rectTransform.anchorMax = UnityEngine.Vector2.one
    rectTransform.sizeDelta = UnityEngine.Vector2.zero
    rectTransform.anchoredPosition3D = UnityEngine.Vector3.zero
    local textComponent = FPSDisplay.fpsTextObj:AddComponent(typeof(UnityEngine.UI.Text))
textComponent.fontSize = 78
    FPSDisplay.fpsTextObj:GetComponent(typeof(UnityEngine.UI.Text)).font = UnityEngine.Resources.GetBuiltinResource(typeof(UnityEngine.Font), "Arial.ttf")
end

-- 在Update函数中更新帧率计数和显示
function FPSDisplay.Update()
    FPSDisplay.frameCount = FPSDisplay.frameCount + 1
    FPSDisplay.deltaTime = FPSDisplay.deltaTime + UnityEngine.Time.unscaledDeltaTime

    if FPSDisplay.frameCount % FPSDisplay.updateRate == 0 then
        local fps = FPSDisplay.updateRate / FPSDisplay.deltaTime
        local textComponent = FPSDisplay.fpsTextObj:GetComponent(typeof(UnityEngine.UI.Text))
        textComponent.text = string.format("FPS: %.2f", fps)
        FPSDisplay.deltaTime = 0.0
    end
end
print("代码结束")
return FPSDisplay

第四步：运行即可