技術標籤：uni導航條

<template>
	<view>
		<view class="tab">
			<view class="tabitem" :class="{ current: filterIndex === 1 }" @click="tab(1)">{{num}}</view>
			<view class="tabitem" :class="{ current: filterIndex === 2 }"
 
 @click="tab(2)">{{num}}</view>
			<view class="tabitem" :class="{ current: filterIndex === 3 }"  @click="tab(3)">{{num}}</view>
		</view>
	</view>
</template>

<script>
	export default {
		name:'tabar',
		data() {
			return
 
 {
				num: 'Hello',
				filterIndex:''
			}
		},
		onLoad() {

		},
		methods: {
			tab(index){
				// if(this.filterIndex === index && index !== 3){
				// 	return
				// }
				this.filterIndex = index;
				console.log(this.filterIndex)
			}
		}
	}
</script>

<style lang="less"
 
 scoped>
	.content {
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
	}

	.logo {
		height: 200rpx;
		width: 200rpx;
		margin-top: 200rpx;
		margin-left: auto;
		margin-right: auto;
		margin-bottom: 50rpx;
	}

	.tab {
		width: 100%;
		height: 50px;
		display: flex;
		justify-content: center;
	}

	.tabitem {
		text-align: center;
		width: 33.3%;
		height: 50px;
		font-size: 36rpx;
		color: #8f8f94;
		&.current{   //表示父標籤自身樣式
			color: #ed7340;
			border-bottom: 2px solid #ed7340;
		}
	}
</style>

實現效果