scroll-sticky.uvue

<template>
	<scroll-view ref="scroll" @scroll="onScroll" class="page" rebound="false">
		<view class="content-item">
			<text class="text">向上滑动页面，体验元素吸顶效果。</text>
		</view>
		<view v-for="(item,index) in list" :key="index" class="content-item">
			<text class="text">first content-{{item}}</text>
		</view>

		<view ref="sticky" class="search">
			<view style="flex-direction: row;">
				<image src="/static/template/scroll-fold-nav/search.png" style="width: 15px;" mode="widthFix"></image>
				<text class="search-tip-text">请输入你要搜索的内容</text>
			</view>
			<text class="search-btn">搜索</text>
		</view>

		<view v-for="(item,index) in list" :key="index" class="content-item">
			<text class="text">second content-{{item}}</text>
		</view>

		<view v-for="(item,index) in list" :key="index" class="content-item">
			<text class="text">second content-{{item}}</text>
		</view>

	</scroll-view>
</template>

<script>
	export default {
		data() {
			return {
				list: ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15'],
				stickyTop: 0,
				stickyTran: 0,
				scrollTop: 0,
				stickyNode: null as UniElement | null
			}
		},
		methods: {
			onScroll(e : ScrollEvent) {
				if (e.detail.scrollTop > this.stickyTop) {
					let stickyTran = e.detail.scrollTop - this.stickyTop;
					if (stickyTran != this.stickyTran) {
						this.stickyNode?.style?.setProperty('transform', 'translateY(' + stickyTran + 'px)');
					}
					this.stickyTran = stickyTran;
				} else {
					this.stickyNode?.style?.setProperty('transform', '');
					this.stickyTran = 0;
				}
			},
			back() {
				uni.navigateBack({
					success(result) {
						console.log('navigateBack success', result.errMsg)
					},
					fail(error) {
						console.log('navigateBack fail', error.errMsg)
					},
					complete(result) {
						console.log('navigateBack complete', result.errMsg)
					},
				})
			}
		},
		onLoad() {
		},
		onReady() {
			this.stickyNode = this.$refs['sticky'] as UniElement;
			// let rect = this.stickyNode?.getBoundingClientRect();
			// this.stickyTop = rect?.top;
			//this.stickyTop = this.stickyNode?.getBoundingClientRect()?.top;
			const stickyRect = (this.$refs['sticky'] as UniElement).getBoundingClientRect();
      const scrollRect = (this.$refs['scroll'] as UniElement).getBoundingClientRect();
			this.stickyTop = stickyRect.top - scrollRect.top;
		}
	}
</script>

<style>
	.page {
		flex: 1;
		padding: 0 15px;
		background-color: #f5f5f5;
	}

	.content-item {
		padding: 15px;
		margin: 5px 0;
		background-color: #fff;
		border-radius: 5px;

	}

	.text {
		font-size: 14px;
		color: #666;
		line-height: 20px;
	}

	.search {
		background-color: #FFFFFF;
		border: 1px solid #fbdf0d;
		height: 35px;
		border-radius: 100px;
		margin: 0 12px;
		padding: 8px;
		flex-direction: row;
		align-items: center;
		justify-content: space-between;
		z-index: 100;
	}

	.search-tip-text {
		font-size: 12px;
		color: #666;
	}

	.search-btn {
		font-size: 12px;
		background-color: #ff6900;
		color: #FFF;
		padding: 5px 8px;
		border-radius: 100px;
	}
</style>