本文实例为大家分享了微信小程序实现弹幕墙的具体代码，供大家参考，具体内容如下
为了解决左右弹幕重叠问题，也是找了网上挺多案例，最后都不行，最后利用四个数组和css3动画animation来解决
这是个祝福墙，用户发送弹幕到后台审核，审核通过显示在前端
<!-- 弹幕墙 --><view class="barrage" wx:if="{{ispush}}"> <view class="barrage-a"> <view class="barrage-b"><image src="../../images/img/a-13.png"></image></view> <view class="barrage-c"> <view class="video_container"> <view class='danmu'> <view class="danmu_wrapper"> <view class="li0" wx:if="{{danmufake0.cnt}}" style="width:{{danmufake0.max}}rpx; animation: dmanimation {{danmufake0.max / 150}}s linear 1s infinite backwards;"> <view wx:for="{{danmufake0.cnt}}" wx:key="danmufake0cntindex" data-idx="{{item.idx}}" data-width="{{item.width}}" class='danmu-li rowandcolcenter' style="left:{{item.left}}rpx"> <text>{{item.title}}</text> </view> </view> <view class="li1" wx:if="{{danmufake1.cnt}}" style="width:{{danmufake1.max}}rpx; animation: dmanimation {{danmufake1.max / 150}}s linear 3s infinite backwards;"> <view wx:for="{{danmufake1.cnt}}" wx:key="danmufake1cnt" data-idx="{{item.idx}}" data-width="{{item.width}}" class='danmu-li rowandcolcenter' style="left:{{item.left}}rpx"> <text>{{item.title}}</text> </view> </view> <view class="li2" wx:if="{{danmufake2.cnt}}" style="width:{{danmufake2.max}}rpx; animation: dmanimation {{danmufake2.max / 150}}s linear 5s infinite backwards;"> <view wx:for="{{danmufake2.cnt}}" wx:key="danmufake2cnt" data-idx="{{item.idx}}" data-width="{{item.width}}" class='danmu-li rowandcolcenter' style="left:{{item.left}}rpx"> <text>{{item.title}}</text> </view> </view> <view class="li3" wx:if="{{danmufake3.cnt}}" style="width:{{danmufake3.max}}rpx; animation: dmanimation {{danmufake3.max / 150}}s linear 7s infinite backwards;"> <view wx:for="{{danmufake3.cnt}}" wx:key="danmufake3cnt" data-idx="{{item.idx}}" data-width="{{item.width}}" class='danmu-li rowandcolcenter' style="left:{{item.left}}rpx"> <text>{{item.title}}</text> </view> </view> </view> </view> </view> <form> <view class="danmugrop"> <input type="text" name="name" bindinput="getinput" class="danmuinput" placeholder='请输入你的祝福语' placeholder-style="color:#b6b2a6;opacity:.55;"></input> <button style="width:108rpx;" class="senddanmu" bindtap='senddanmu' form-type='reset'> <image src="/images/img/a-3.png"></image> <text>发送</text> </button> </view> </form> </view> </view></view>js:
var danmu0=[];
var danmu1=[];
var danmu2=[];
var danmu3=[];
for (var i = 0; i < res.data.entity.length; i++) {
const num = math.floor(math.random() * 4);
if(num == 0){
var left = 0;
if(danmu0.length){left = danmu0[danmu0.length-1].left + danmu0[danmu0.length-1].width + 80;}
left = left < 0 ? 0 : left;
danmu0.push({
title: res.data.entity[i].newscontent,
left: left,
width:res.data.entity[i].newscontent.length*24,
idx: num
});
}
if(num == 1){
var left = 0;
if(danmu1.length){left = danmu1[danmu1.length-1].left + danmu1[danmu1.length-1].width + 80;}
left = left < 0 ? 0 : left;
danmu1.push({
title: res.data.entity[i].newscontent,
width:res.data.entity[i].newscontent.length*24,
left: left,
idx: num
});
}
if(num == 2){
var left = 0;
if(danmu2.length){left = danmu2[danmu2.length-1].left + danmu2[danmu2.length-1].width + 80;}
left = left < 0 ? 0 : left;
danmu2.push({
title: res.data.entity[i].newscontent,
width:res.data.entity[i].newscontent.length*24,
left: left,
idx: num
});
}
if(num == 3){
var left = 0;
if(danmu3.length){left = danmu3[danmu3.length-1].left + danmu3[danmu3.length-1].width + 80;}
left = left < 0 ? 0 : left;
danmu3.push({
title: res.data.entity[i].newscontent,
width:res.data.entity[i].newscontent.length*24,
left: left,
idx: num
});
}
}
that.setdata({
danmufake0: {
max : danmu0[danmu0.length-1].left + danmu0[danmu0.length-1].width + 80,
cnt:danmu0
},
danmufake1: {
max : danmu1[danmu1.length-1].left + danmu1[danmu1.length-1].width + 80,
cnt:danmu1
},
danmufake2: {
max : danmu2[danmu2.length-1].left + danmu2[danmu2.length-1].width + 80,
cnt:danmu2
},
danmufake3: {
max : danmu3[danmu3.length-1].left + danmu3[danmu3.length-1].width + 80,
cnt:danmu3
}
})
var danmumaxwid = math.max(that.data.danmufake0.max,that.data.danmufake1.max,that.data.danmufake2.max,that.data.danmufake3.max);
that.setdata({
danmumaxwid:danmumaxwid
})
为大家推荐现在关注度比较高的微信小程序教程一篇：《微信小程序开发教程》www.887551.com为大家精心整理的，希望喜欢。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持www.887551.com。