展示了最小的tolua#环境，以及执行一段lua代码操作代码如下：
LuaState lua = new LuaState();
lua.Start();
string hello =
@"
print('hello tolua#')
";
lua.DoString(hello, "HelloWorld.cs");
lua.CheckTop();
lua.Dispose();
lua = null;
LuaState封装了对lua 主要数据结构 lua_State 指针的各种堆栈操作。
一般对于客户端，推荐只创建一个LuaState对象。如果要使用多State需要在Unity中设置全局宏 MULTI_STATE
注意: 此例子无法发布到手机
展示了dofile跟require的区别, 代码如下:
LuaState lua = null;
void Start ()
{
lua = new LuaState();
lua.Start();
//如果移动了ToLua目录，需要自己手动，这里只是例子就不做配置了
string fullPath = Application.dataPath + "/ToLua/Examples/02_ScriptsFromFile";
lua.AddSearchPath(fullPath);
}
void OnGUI()
{
if (GUI.Button(new Rect(50, 50, 120, 45), "DoFile"))
{
lua.DoFile("ScriptsFromFile.lua");
}
else if (GUI.Button(new Rect(50, 150, 120, 45), "Require"))
{
lua.Require("ScriptsFromFile");
}
lua.Collect();
lua.CheckTop();
}
void OnApplicationQuit()
{
lua.Dispose();
lua = null;
}
tolua#DoFile函数,跟lua保持一致行为,能多次执行一个文件。tolua#加入了新的Require函数,无论c#和lua谁先require一个lua文件, 都能保证加载唯一性
注意: 虽然有文件加载,但此例子无法发布到手机, 如果ToLua目录不在/Assets目录下, 需要修改代码中的目录位置
展示了如何调用lua的函数, 主要代码如下:
private string script =
@" function luaFunc(num)
return num + 1
end
test = {}
test.luaFunc = luaFunc
";
LuaFunction luaFunc = null;
LuaState lua = null;
void Start ()
{
new LuaResLoader();
lua = new LuaState();
lua.Start();
DelegateFactory.Init();
lua.DoString(script);
//Get the function object
luaFunc = lua.GetFunction("test.luaFunc");
if (func != null)
{
int num = luaFunc.Invoke<int, int>(123456);
Debugger.Log("generic call return: {0}", num);
num = CallFunc();
Debugger.Log("expansion call return: {0}", num);
Func<int, int> Func = luaFunc.ToDelegate<Func<int, int>>();
num = Func(123456);
Debugger.Log("Delegate call return: {0}", num);
num = lua.Invoke<int, int>("test.luaFunc", 123456, true);
Debugger.Log("luastate call return: {0}", num);
}
lua.CheckTop();
}
void OnDestroy()
{
if (luaFunc != null)
{
luaFunc.Dispose();
luaFunc = null;
}
lua.Dispose();
lua = null;
}
int CallFunc()
{
luaFunc.BeginPCall();
luaFunc.Push(123456);
luaFunc.PCall();
int num = (int)luaFunc.CheckNumber();
luaFunc.EndPCall();
return num;
}
tolua# 简化了lua函数的操作，通过LuaFunction封装(并缓存)一个lua函数，并提供各种操作, 建议频繁调用函数使用无GC方式。
注意: 无论Call还是PCall只相当于lua中的函数’.’调用。
请注意’:’这种语法糖 self:call(…) == self.call(self, …）
c# 中需要按后面方式调用, 即必须主动传入第一个参数self
展示了如何访问lua中变量，table的操作
private string script =
@"
print('Objs2Spawn is: '..Objs2Spawn)
var2read = 42
varTable = {1,2,3,4,5}
varTable.default = 1
varTable.map = {}
varTable.map.name = 'map'
meta = {name = 'meta'}
setmetatable(varTable, meta)
function TestFunc(strs)
print('get func by variable')
end
";
void Start ()
{
new LuaResLoader();
LuaState lua = new LuaState();
lua.Start();
lua["Objs2Spawn"] = 5;
lua.DoString(script);
//通过LuaState访问
Debugger.Log("Read var from lua: {0}", lua["var2read"]);
Debugger.Log("Read table var from lua: {0}", lua["varTable.default"]); //LuaState 拆串式table
LuaFunction func = lua["TestFunc"] as LuaFunction;
func.Call();
func.Dispose();
//cache成LuaTable进行访问
LuaTable table = lua.GetTable("varTable");
Debugger.Log("Read varTable from lua, default: {0} name: {1}", table["default"], table["map.name"]);
table["map.name"] = "new"; //table 字符串只能是key
Debugger.Log("Modify varTable name: {0}", table["map.name"]);
table.AddTable("newmap");
LuaTable table1 = (LuaTable)table["newmap"];
table1["name"] = "table1";
Debugger.Log("varTable.newmap name: {0}", table1["name"]);
table1.Dispose();
table1 = table.GetMetaTable();
if (table1 != null)
{
Debugger.Log("varTable metatable name: {0}", table1["name"]);
}
object[] list = table.ToArray();
for (int i = 0; i < list.Length; i++)
{
Debugger.Log("varTable[{0}], is {1}", i, list[i]);
}
table.Dispose();
lua.CheckTop();
lua.Dispose();
}
展示了如何使用lua协同, lua 代码如下：
function fib(n)
local a, b = 0, 1
while n > 0 do
a, b = b, a + b
n = n - 1
end
return a
end
function CoFunc()
print('Coroutine started')
for i = 1, 10, 1 do
print(fib(i))
coroutine.wait(0.1)
end
print("current frameCount: "..Time.frameCount)
coroutine.step()
print("yield frameCount: "..Time.frameCount)
local www = UnityEngine.WWW("http://www.baidu.com")
coroutine.www(www)
local s = tolua.tolstring(www.bytes)
print(s:sub(1, 128))
print('Coroutine ended')
end
function TestCortinue()
coroutine.start(CoFunc)
end
local coDelay = nil
function Delay()
local c = 1
while true do
coroutine.wait(1)
print("Count: "..c)
c = c + 1
end
end
function StartDelay()
coDelay = coroutine.start(Delay)
end
function StopDelay()
coroutine.stop(coDelay)
end
c#代码如下:
new LuaResLoader();
lua = new LuaState();
lua.Start();
LuaBinder.Bind(lua);
DelegateFactory.Init();
looper = gameObject.AddComponent<LuaLooper>();
looper.luaState = lua;
lua.DoString(luaFile.text, "TestLuaCoroutine.lua");
LuaFunction f = lua.GetFunction("TestCortinue");
f.Call();
f.Dispose();
f = null;