官方解决
我的代码：
html：
<scroll-view id="scrollView"
scroll-y
:scroll-top="scrollTop"
:scroll-with-animation="true"
:style="{height:style.contentH+'px'}"
@scroll="scroll"><block v-for="(item,index) in list" :key="index"><user-chat-list :item="item" :index="index"></user-chat-list></block>
</scroll-view>
js：
export default {components: {userChatBottom,userChatList},data() {return {scrollTop: 0, // 滚动条的位置old: {scrollTop: 0},style: {contentH: 0,itemH: 0},list: [{isme: false,userpic: "../../static/demo/userpic/11.jpg",type: "text",data: "哈哈哈",time: "1595904223",gstime: ""},{isme: true,userpic: "../../static/demo/userpic/12.jpg",type: "text",data: "哈哈哈",time: "1596163423",gstime: ""},{isme: false,userpic: "../../static/demo/userpic/11.jpg",type: "text",data: "哈哈哈",time: "1596163423",gstime: ""},{isme: true,userpic: "../../static/demo/userpic/12.jpg",type: "img",data: "../../static/demo/3.jpg",time: "1596163423",gstime: ""},]}},onLoad() {this.getData();this.initData();},onReady() {this.pageToBottom()},methods: {scroll(e){console.log(e)this.old.scrollTop = e.detail.scrollTop},//初始化参数，聊天页面中间空白处大小initData() {try {this.style.contentH = uni.getSystemInfoSync().windowHeight - uni.upx2px(120)} catch (e) {}},// 回到底部pageToBottom() {this.style.itemH = 0let q = uni.createSelectorQuery()// let botomInputHeight = uni.upx2px(120)q.select('#scrollView').boundingClientRect();q.selectAll(".user-chat-item").boundingClientRect()q.exec((res) => {20// console.log(res[0][res[0].length-1].bottom)// this.style.itemH = res[0][res[0].length-1].bottomres[1].forEach((ret) => {this.style.itemH += ret.height})console.log(res[1])console.log(this.style.itemH ,this.style.contentH)this.scrollTop = this.old.scrollTopthis.$nextTick(function() {this.scrollTop = this.style.itemH - this.style.contentH + uni.upx2px(130)});})},//得到聊天数据getData() {for (let i = 0; i < this.list.length; i++) {this.list[i].gstime = time.gettime.getChatTime(this.list[i].time, i > 0 ? this.list[i - 1].time : 0)}},submit(data) {if (this.isEmpty(data)) {return}console.log("当前输入的是", data)// 构建数据let now = new Date().getTime()let obj = {isme: true,userpic: "../../static/demo/userpic/12.jpg",type: "text",data: data,time: now,gstime: time.gettime.getChatTime(now, this.list[this.list.length - 1].time)}this.list.push(obj)this.pageToBottom()}}}
