效果

 代码

 

<template><view><view class='line3'><view class='line3_position'><view class='left'>数量<text>*</text></view> <view class="right"><view class="quantity_btn"><view class="minus_quantity" @click="decrease">-</view><input class="input_quantity" type="number" v-model="quantity" @input="handleInput"><view class="add_quantity" @click="increase">+</view></view></view></view></view></view>
</template><script>export default {data() {return {quantity: 1};},methods: {handleInput(event) {const value = parseInt(event.target.value);if (!isNaN(value) && value >= 1) {this.quantity = value;} else {this.quantity = 1;}},increase() {this.quantity++;},decrease() {if (this.quantity > 1) {this.quantity--;}}}};
</script>
<style lang="scss">.quantity_btn {display: flex;width: 50%;.add_quantity {border: 1px solid #74bfe7;text-align: center;width: 25%;}.input_quantity {// border-bottom: 1px solid #74bfe7;text-align: center;width: 50%;}.minus_quantity {border: 1px solid #74bfe7;text-align: center;width: 25%;}}.line3 {padding: 20rpx;// border: 1px solid black;.line3_position{width: 100%;display: flex;.left {width: 30%;// border: 1px solid black;}.right {display:flex;justify-content:flex-end;width: 70%;// border: 1px solid black;}}// border:1px solid black;}
</style>