-- 获取宽字符的宽度function wideWordWidth(fontName, fontSize)    local key = generateKey(fontName, fontSize)    if mWideWordWidth[key] == nil then        local str ="ABCDEFGHIGKLMNopqrstuvwxyz1234567890"        mWideWordWidth[key] = cc.LabelTTF:create(str, fontName, fontSize):getContentSize().width / (string.len(str) / 3)    end    return mWideWordWidth[key]end-- 生成keyfunction generateKey(fontName, fontSize)    return string.format("%s%d", fontName, fontSize)end-- 1 创建剪裁区self.m_pClipRect = cc.rect(0, display.cy, display.width * 0.2, display.height * 0.2)self.m_pClipNode = display.newClippingRegionNode(self.m_pClipRect):addTo(self)-- 2 创建文本区域self.msgContent = cc.ui.UILabel.new({    text = "你好 我是滚动文本",    font = FONT_NAME,    size = ZySize.SCALE(26),    color = cc.c3b(255, 255, 255),    dimensions = cc.size(w, h),    align = ui.TEXT_ALIGN_CENTER, -- 文字内部居中对齐    valign = ui.TEXT_VALIGN_CENTER -- 文字内部居中对齐    }):align(display.CENTER_LEFT, self.m_pClipRect.width + self.m_pClipRect.x, self.m_pClipRect.y + display.height * 0.2 * 0.5):addTo(self.m_pClipNode)-- 3 滚动文字的长度local textW = math.round( self.msgContent:getContentSize().width) -- 4 移动距离local nDistance = math.round( self.m_pClipRect.width) + textW-- 5 移动所需时间local speed = 2 --一秒移动多少个文字的距离local nTime = math.floor(nDistance/wideWordWidth(FONT_NAME, ZySize.SCALE(26))/speed)-- 6 动作local tarfinsh = function()    if self.msgContent ~= nil then        self.msgContent:removeSelf()        self.msgContent = nil    endendlocal pAction = cc.MoveBy:create(nTime, cc.p(-self.m_pClipRect.width, 0))local pCallback = cc.CallFunc:create(tarfinsh)local rep = cc.Sequence:create(pAction, pCallback)self.msgContent:runAction(rep)

local pActionShow = cc.MoveTo:create(0.5, cc.p(display.cx, self.m_pClipRect.y + self.m_pClipRect.height * 0.5))local pActionStay = cc.DelayTime:create(2)local pActionDisappear = cc.MoveTo:create(0.5, cc.p(display.cx, self.m_pClipRect.y + self.m_pClipRect.height + self.m_pClipRect.height * 0.5 ))local pCallback = cc.CallFunc:create(tarfinsh)local rep = cc.Sequence:create(pActionShow, pActionStay, pActionDisappear, pCallback)self.msgContent:runAction(rep)