uniapp实现顶部选项卡

话不多少，上代码。

<template>
	<view class="container">
		<!-- 搜索栏 -->
		<view class="searchbar">
			<view class="search-box">
				<input class="search-input" placeholder="请输入要检索的关键字" :value="searchValue" @input="onKeyInput"
					@confirm="search" :focus="focusState" />
				<icon class="search-icon" v-if="showClearIcon" @click="claerIcon" type="clear" @tap="claerIcon"></icon>
			</view>
		</view>
		<view class="searchresult">{
   
   {searchValue}}</view>
		<!-- 顶部选项卡 -->
		<scroll-view id="tab" :scroll="false" :scroll-x="true" :show-scrollbar="false">
			<view style="flex-direction: column;">
				<view style="flex-direction: row;">
					<view v-for="(item,index) in tabList" :key="item.id" class="tabName" :data-current="index"
						@click="ontabtap"  :class="tabIndex == index?'active_text':''">
						<text class="tabName_text">{
   
   {item.name}}</text>
					</view>
				</view>
			</view>
		</scroll-view>
		<view class="scroll-view-indicator">
		</view>
	</view>

</template>

<script>
	export default {
		data() {
			return {
				searchValue: '',
				focusState: true,
				showClearIcon: false,
				tabIndex: 0,
				tabList: [{
					id: "tab01",
					name: '全部',
					newsid: 0
				}, {
					id: "tab02",
					name: '法律',
					newsid: 23
				}, {
					id: "tab03",
					name: '行政法规',
					newsid: 223
				}, {
					id: "tab04",
					name: '部门规章',
					newsid: 221
				}, {
					id: "tab05",
					name: '地方性法规',
					newsid: 225
				}, {
					id: "tab06",
					name: '地方政府规章',
					newsid: 208
				}, {
					id: "tab07",
					name: '其他',
					newsid: 208
				}],

			}
		},
		onReady() {},
		methods: {
			//input组件绑定事件
			search(res) {
				// this.searchValue = "";
				// this.showClearIcon = false;
				// this.focusState = false;
				// this.$nextTick(function() {
				// 	this.focusState = true;
				// })
				uni.showToast({
					title: this.searchValue,
					icon: "none"
				})
			},
			clear(res) {
				this.focusState = false;
				this.$nextTick(() => {
					/*DOM更新后*/
					this.focusState = true
				})
			},
			onKeyInput: function(event) {
				this.searchValue = event.detail.value;
				if (event.detail.value.length > 0) {
					this.showClearIcon = true;
				} else {
					this.showClearIcon = false;
				}
			},
			claerIcon: function() {
				this.searchValue = '';
				this.showClearIcon = false;
				this.focusState = false;
				this.$nextTick(() => {
					/*DOM更新后*/
					this.focusState = true;
				})
			},
			//顶部选项卡
			ontabtap(e) {
				console.log(e.target.dataset.current);
				console.log(e.currentTarget.dataset.current);
				let index = e.target.dataset.current || e.currentTarget.dataset.current;
				this.switchTab(index);
			},
			switchTab(index) {
				if (this.tabIndex == index) {
					return
				}
				this.tabIndex = index;
			}
		}
	}
</script>

<style>
	.container {
		display: flex;
		flex-direction: column;
		font-size: 40rpx;
	}

	.searchbar {
		width: 100%;
		position: fixed;
	}

	.search-box {
		width: 100%;
		height: 100rpx;
		display: flex;
		flex-direction: row;
		background-color: #0075F3;
		justify-content: space-between;
		align-items: center;
		padding: 20rpx 20rpx 20rpx 20rpx;
		box-sizing: border-box;
	}

	.search-input {
		height: 75rpx;
		width: 100%;
		border-radius: 10rpx;
		line-height: 28px;
		font-size: 35rpx;
		padding-left: 10rpx;
		flex: 1;
		background-color: #FFFFFF;
	}

	.search-icon {
		padding-left: 20rpx;
		size: 60;
	}

	.searchresult {
		margin-top: 100rpx;
	}

	#tab {
		width: 100%;
		display: flex;
		/* overflow: hidden; */
		white-space: nowrap;
		font-size: 30rpx;
	}

	.tabName {
		padding-left: 10rpx;
		padding-right: 10rpx;
		text-align: center;
		/* width: 20%; */
		display: inline-block;
		height: 70rpx;
		line-height: 60rpx;
		white-space: nowrap;
	}

	.tabName_text {
		display: inline-block;
		width: 100%;
		height: 100%;
	}

	.active_text {
		background-color: #0075F3;
		color: #FFFFFF;
		transition-duration: 2s;
		transition-property: left;
	}

	.scroll-view-indicator {
		border-bottom: solid 1rpx #0075F3;
	}
</style>

 实现后的效果

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