lua分帧处理任务，多用于显示对象创建

FrameTaskExt.lua

local FrameTaskExt = {}
FrameTaskExt.__index = FrameTaskExt

-- isFinish, isContinue function taskFunc(times)
function FrameTaskExt.new(taskFunc)
    local o = {}
    setmetatable(o, FrameTaskExt)
    o:_init(taskFunc)
    return o
end

function FrameTaskExt:start()
    if not self._isRuning and not self._isFinish then
        self._timer:Start()
    end
end

function FrameTaskExt:stop()
    if self._isRuning then
        self._timer:Stop()
    end
end

function FrameTaskExt:reset(taskFunc)
    self._taskFunc = taskFunc or self._taskFunc
    self._times = 0
    self._isFinish = false
    self:stop()
end

function FrameTaskExt:_init(taskFunc)
    self._taskFunc = taskFunc
    self._times = 0
    self._isRuning = false
    self._isFinish = false
    self._timer = FrameTimer.New(function() self:_onTimer() end, 1, -1)
end

function FrameTaskExt:_onTimer()
    self._times = self._times + 1
    local isContinue = false
    self._isFinish, isContinue = self._taskFunc(self._times)
    if self._isFinish then
        isContinue = false
        self._isFinish = true
    end
    if isContinue then
        self:_onTimer()
    end
end

return FrameTaskExt