虚拟列表 Virtual ​

<template>
	<tm-app>
		<tm-sheet>
			<tm-text :font-size="30" _class="font-weight-b" label="基础示例,更多见文档，以下是展示你可以无限加载图片列表，你将看不到任何卡顿或者阻塞。超高性能的虚拟列表。"></tm-text>
			<tm-divider></tm-divider>
			<view class="flex flex-col flex-col-top-center">
			<tm-virtual-list :load="getdata" :width="626" :height="900" :data="imglist" :itemHeight="160">
					<template v-slot:default="{data}">
						<tm-sheet :border="1" borderDirection="bottom" :height="160" :width="626" _class="flex flex-row flex-row-center-start" :padding="[0,0]" :margin="[0,0]" v-for="(item,index) in data" :key="index">
							<view class="flex flex-row flex-row-center-between flex-1">
								<tm-image  :width="200" :height="100" :src="item.src" ></tm-image>
								<tm-text :label="'image-Row-'+item.index"></tm-text>
							</view>
						</tm-sheet>
					</template>
				</tm-virtual-list>
			</view>
		</tm-sheet>
	</tm-app>
</template>
<script lang="ts" setup>
import {
	ref
} from "vue";
import {
	onShow,
	onLoad
} from "@dcloudio/uni-app";
import tmApp from "@/tmui/components/tm-app/tm-app.vue"
import tmSheet from "@/tmui/components/tm-sheet/tm-sheet.vue"
import tmText from "@/tmui/components/tm-text/tm-text.vue"
import tmImageGroup from "@/tmui/components/tm-image-group/tm-image-group.vue"
import tmImage from "@/tmui/components/tm-image/tm-image.vue"
import tmVirtualList from "@/tmui/components/tm-virtual-list/tm-virtual-list.vue"
import tmDivider from "@/tmui/components/tm-divider/tm-divider.vue"
const imglist = ref([])
const getdata = (e:string)=>{
	return new Promise((res,rej)=>{
		setTimeout(function() {
			if(e=='top'){
				imglist.value = []
				for(let i=0;i<10;i++){
					imglist.value.push({src:'https://i0.pickpik.com/photos/298/434/513/beach-dawn-dusk-ocean-thumb.jpg',index:i})
				}
			}else if(e=='bottom'){
				let len = imglist.value.length;
				for(let i=len;i<10+len;i++){
					imglist.value.push({src:'https://i0.pickpik.com/photos/298/434/513/beach-dawn-dusk-ocean-thumb.jpg',index:i})
				}
			}
			res(true)
		}, 2500);
	})
}
</script>