微信小程式實現彈幕牆(祝福牆)
阿新 • • 發佈:2020-11-19
本文例項為大家分享了微信小程式實現彈幕牆的具體程式碼,供大家參考,具體內容如下
為了解決左右彈幕重疊問題,也是找了網上挺多案例,最後都不行,最後利用四個陣列和css3動畫animation來解決
這是個祝福牆,使用者傳送彈幕到後臺稽核,稽核通過顯示在前端
<!-- 彈幕牆 --> <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='請輸入你的祝福語' 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>傳送</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,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,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,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 })
為大家推薦現在關注度比較高的微信小程式教程一篇:《微信小程式開發教程》小編為大家精心整理的,希望喜歡。
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