记录一些lua的通用方法、小技巧,会持续更新。
1. 在回调函数中使用self
-- 回调函数传参
function handler(obj,method)
return function(...)
return method(obj,...)
end
end
使用方式:self.CellButton.onClick:AddListener(handler(self,self.OnClick_Cell))
2. 输出打印table表
function table2String(tb)
if type(tb) ~= 'table' then
return ''
end
local strs = {
'{\n'}
local stack = {
}
_table2String(tb, 0, strs, stack)
table.insert(strs, "}")
return table.concat(strs)
end
local function _table2String(t, depth, strs, stack)
table.insert(stack, t)
depth = depth + 1
local indent = ""
for i=1, depth do
indent = indent .. " "
end
for k, v in pairs(t) do
local key = tostring(k)
local typeV = type(v)
if typeV == "table" then
if key ~= "__valuePrototype" then
local contains = nil
for k1, v1 in ipairs(stack) do
if v1 == v then
contains = true
break
end
end
if contains then
table.insert(strs, indent.._formatKey(key).." = {检测到循环引用!},\n")
else
table.insert(strs, indent.._formatKey(key).." = {\n")
_table2String(v, depth, strs, stack)
table.insert(strs, indent.."},\n")
end
end
elseif typeV == "string" then
table.insert(strs, string.format("%s%s = \"%s\",\n", indent, _formatKey(key), tostring(v)))
else
table.insert(strs, string.format("%s%s = %s,\n", indent, _formatKey(key), tostring(v)))
end
end
table.remove(stack)
end
local function _formatKey(key)
local t = type(key)
if t == "number" then
return "["..key.."]"
elseif t == "string" then
local n = tonumber(key)
if n then
return "["..key.."]"
end
end
return key
end
3. 分割字符串
function SplitStr(str, reps)
local r = {
}
if str == nil then return nil end
string.gsub(str, "[^"..reps.."]+", function(w) table.insert(r, w) end)
return r
end
4. clone
function clone(object)
local lookup_table = {
}
local function _copy(object)
if type(object) ~= "table" then
return object
elseif lookup_table[object] then
return lookup_table[object]
end
local newObject = {
}
lookup_table[object] = newObject
for key, value in pairs(object) do
newObject[_copy(key)] = _copy(value)
end
return setmetatable(newObject, getmetatable(object))
end
return _copy(object)
end
5. lua热重载,用于界面刷新
function Reload( moduleName )
if isEditor() then
if package.loaded[moduleName] == nil then
print("not require")
end
package.loaded[moduleName] = nil
require(moduleName)
end
end
6. lua中使用类似于string.join函数
table.concat(Table,分隔符,起始下标,结束下标)