关于uniapp:uniapp项目实践总结十七实现滚动触底加载

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导语：在日测的开发过程中，常常会碰到页面须要渲染大量数据的状况，这时候就须要用到滚动加载性能，上面总结一下办法。

原理剖析
实战演练
案例展现

应用 @scrolltolower 事件来监听滚动到底部，而后加载下一页的数据。

<scroll-view
  :scroll-y="true"
  class="block-main block-two-level block-pad"
  @scrolltolower="scrollBottom">
  <view class="scroll-ls" v-for="(item, index) in scrollInfo.list" :key="index"> {{item}} </view>
  <uni-load-more v-if="scrollInfo.list.length" :status="scrollInfo.loading"></uni-load-more>
</scroll-view>

.scroll-ls {
  margin-top: 20rpx;
  padding: 50rpx 0;
  text-align: center;
  background: $f8;
}

定义数据

// 滚动列表
const scrollInfo = reactive({
  originList: [
    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
    27, 28,
  ],
  list: [],
  pageInfo: {
    page: 1,
    size: 8,
    pages: 0,
  },
  loading: "more",
});

办法调用

// 滚动到底部
function scrollBottom() {console.log("滚动到底部!");
  if (scrollInfo.pageInfo.page < scrollInfo.pageInfo.pages) {
    scrollInfo.pageInfo.page++;
    scrollInfo.loading = "loading";
    getList();} else {scrollInfo.loading = "noMore";}
}

获取列表

// 获取列表
function getList() {if (scrollInfo.pageInfo.page <= 1) {show.value = true;}
  let data = proxy.$apis.utils.splitData(scrollInfo.originList, 8);
  scrollInfo.pageInfo.pages = data.pages;
  setTimeout(() => {if (scrollInfo.pageInfo.page <= 1) {scrollInfo.list = data.list[scrollInfo.pageInfo.page - 1];
      setTimeout(() => {show.value = false;}, 500);
    } else {scrollInfo.list = [...scrollInfo.list, ...data.list[scrollInfo.pageInfo.page - 1]];
    }
    scrollInfo.loading = scrollInfo.pageInfo.page < scrollInfo.pageInfo.pages ? "more" : "noMore";
  }, 1000);
}