Instances

getcallbackvalue

Doc Lua callback function duoc luu trong callback property tren Instance. Doi so dau tien phai la Instance object va doi so thu hai phai la string property name. instance reference phai hop le. property name duoc resolve qua Roblox property metadata va phai tro den property co type LUA_CALLBACK. Neu thieu property descriptor, property khong phai LUA_CALLBACK, thieu callback field offset, khong co callback duoc luu, thieu LiveLuaRef, callback thuoc Lua global state khac, hoac gia tri duoc tham chieu khong phai function, function tra ve nil. No cung kiem tra async callback field fallback khi callback slot dau tien khong co callback. Function khong cap nhat property.

getcallbackvalue(instance: Instance, property: string): function | nil

Alias

getcallbackmember

Đối số

Instance

bắt buộc

Instance object noi callback property duoc kiem tra. Invalid Instance values tao argument error.

string

bắt buộc

string property name duoc resolve qua Roblox property metadata. Chi LUA_CALLBACK properties co the tra ve function.

Giá trị trả về

function | nil

Lua function duoc luu boi callback property, hoac nil khi function khong the resolve function co the doc.

Ví dụ

Doc callback function duoc luu trong BindableFunction.OnInvoke.

local bindable = Instance.new("BindableFunction")
bindable.OnInvoke = function(value)
    return value * 2
end

local callback = getcallbackvalue(bindable, "OnInvoke")
if callback then
    print(callback(21))
end

​Alias

​Đối số

​Giá trị trả về

​Ví dụ

Alias

Đối số

Giá trị trả về

Ví dụ