滚轮翻看：背包列表跟着滚轮走的顺滑滚动

wheel-scroll

-- UI 根节点创建时: 递归给纵向列表注入滚轮支持
local function checkChildren(children)
    for _, child in pairs(children) do
        local desc = child.getDescription and child:getDescription()
        if desc == "ListView" or desc == "ScrollView" then
            if child:getDirection() == 1 then       -- 纵向才接管
                child:addMouseScrollPercent()
            end
        end
        checkChildren(child:getChildren())
    end
end
checkChildren(rootNode:getChildren())

-- 滚轮增量 → 滚动百分比步进
function ScrollView:addMouseScrollPercent(callback)
    local listener = cc.EventListenerMouse:create()
    local percentStep = 8                            -- 每档滚动 8% 距离
    listener:onMouseScroll(function(event)
        local sy = event:getScrollY()
        local cur = self:getScrolledPercentY()
        local next = math.max(0, math.min(100, cur - sy * percentStep))
        self.scrollToPercentY(next, 0.08, false)     -- 0.08s 缓动到位
        if callback then callback(next) end
    end)
    cc.Director:getInstance():getEventDispatcher()
        :addEventListenerWithSceneGraphPriority(listener, self)
end