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unity实战之弹幕功能
前言
最近项目需要加一个弹幕的功能。天天追剧的我，对于弹幕这个东西简直不要太熟悉，但是突然让做一个这样一个功能，还是有点戳手不及。
先来欣赏一个视频网站上的弹幕吧，如下：
UI
创建按钮，命名为barrage_btn，用于控制弹幕的开关，下面有2张图片，分别命名为hideImg和showImg，用于显示弹幕开关的状态
创建发射弹幕按钮，命名为shoot_btn。
创建输入框input_barrage
创建弹幕移动载体（父类）barrageBg
代码
local ui = nil
local barrageProto = {
[1] = { word = "哈哈哈哈", },
[2] = { word = "小可爱来了", },
[3] = { word = "终于上线了", },
[4] = { word = "小木好逗啊", },
[5] = { word = "我永远喜欢做游戏", },
[6] = { word = "爱上游戏开发登场了", },
[7] = { word = "为Unity而来", },
}
local barragePool = {}
local barrageLineY = {-100, 0, 100, 150, 200, 250, 300}--从上到下每行弹幕位置
local myBarrage = {}
function herotalent:start()
ui = {}
ui.shootBtn = base:findobj("barrage_btn")
utils.addclickevent(ui.shootBtn, base.ShootBarrage)
ui.inputBarrage = base:findinput("input_barrage")
ui.inputBarrage.characterLimit = 20--每条弹幕的字数限制
ui.inputBarrageObj = base:findobj("bg")
ui.barrage_btn = base:findobj("barrage_btn")
utils.addclickevent(ui.barrage_btn, base.ClickCloseBarrageBtn)
ui.closeBarrageObj = base:findobj("barrage_btn/hideImg")
ui.showBarrageObj = base:findobj("barrage_btn/showImg")
ui.barrageBgRect = base:findrect("barrageBg")
ui.startPointObj = base:findobj("startPoint")
end
function herotalent:commit()
ui.barrageBgRect.gameObject.transform:DOLocalMoveX(-8000, 68)
base.RefreshUI()
end
function herotalent.RefreshUI()
base.CreateBarragePool()
end
function base.ClickCloseBarrageBtn()
SetActive(ui.closeBarrageObj, not ui.closeBarrageObj.activeInHierarchy)
SetActive(ui.showBarrageObj, not ui.showBarrageObj.activeInHierarchy)
SetActive(ui.inputBarrageObj, not ui.closeBarrageObj.activeInHierarchy)
corStopBol = not ui.closeBarrageObj.activeInHierarchy
if ui.closeBarrageObj.activeInHierarchy then
coroutine.resume(base.barCor)
end
end
function base.ShootBarrage()
if ui.inputBarrage.text ~= nil and ui.inputBarrage.text ~= "" then
if pb.isWarningInPutStr(ui.inputBarrage.text) then
printlog("弹幕内容包含违规字")
else
table.insert(myBarrage, ui.inputBarrage.text)
base.ClickCloseBarrageBtn()
end
ui.inputBarrage.text = ""
end
end
function base.CreateBarragePool()
local randomseed = 10000 --随机种子
math.randomseed(randomseed)
local totalNum = table.tablelen(barrageProto)
local time = 50
local clearTime = 2
local barrageGroup = {}
base.barCor = coroutine.start(function()
while time > 0 do
local waitTime = math.random(0, 1.0)
while waitTime > 0 do
waitTime = waitTime - 0.2
time = time - 0.2
clearTime = clearTime - 0.2
coroutine.wait(0.2)
if corStopBol then
DOTween.Pause(ui.barrageBgRect.gameObject.transform)
coroutine.yield()
DOTween.Play(ui.barrageBgRect.gameObject.transform)
end
end
local startPoint = ui.barrageBgRect.gameObject.transform:InverseTransformPoint(ui.startPointObj.transform.position)
local index = 7
local barText = nil
local myBarrageBol = false
if #myBarrage > 0 then
barText = myBarrage[1]
for i = 6, 1, -1 do
if barragePool[i] then
local sizeX = barragePool[i]:GetComponent("RectTransform").sizeDelta.x / 2
if startPoint.x - barragePool[i].transform.localPosition.x > sizeX then
index = i
break
end
else
index = i
break
end
end
myBarrageBol = true
else
local line = math.random(1, 6)
barText = barrageProto[math.random(1, totalNum)].word
if barragePool[line] then
local sizeX = barragePool[line]:GetComponent("RectTransform").sizeDelta.x / 2
if startPoint.x - barragePool[line].transform.localPosition.x > sizeX then
index = line
else
index = nil
end
else
index = line
end
end
if index then
local barObj = poolManager.AddObj("Modules/login/barrage.prefab", ui.barrageBgRect.gameObject)
table.insert(barrageGroup, barObj)
barObj:GetComponent("Text").text = barText
UnityEngine.UI.LayoutRebuilder.ForceRebuildLayoutImmediate(barObj:GetComponent("RectTransform"))
barObj.transform.localPosition = Vector2.New(startPoint.x + barObj:GetComponent("RectTransform").sizeDelta.x / 2, barrageLineY[index])
barragePool[index] = barObj
if myBarrageBol then
table.remove(myBarrage, 1)
end
end
local clearIndex = {}
if clearTime <= 0 then
for k, v in ipairs(barrageGroup) do
local tempX = v:GetComponent("RectTransform").sizeDelta.x * 2
if startPoint.x - v.transform.localPosition.x > tempX + 1440 then
poolManager.RemoveObj("Modules/login/barrage.prefab", v)
table.insert(clearIndex, k)
end
end
if #clearIndex > 0 then
for i = #clearIndex, 1, -1 do
table.remove(barrageGroup, clearIndex[i])
end
end
clearTime = 2
end
end
end)
end
效果
运行效果如下：
标题：unity实战之弹幕功能
作者：shirlnGame
地址：https://www.mmzsblog.cn/articles/2022/08/11/1660200521185.html
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