@input事件 ，当键盘输入时，触发input事件，event.detail = {value}

场景

@input事件想要传递一个参数到方法中 但是同时还要保留原来返回的event

解决方法：$event

@input="onKeyInput($event,123)"

运用

<view class="item" v-for="(item,index) in PickedList" :key="index">
	<view class="itemTop">
		<view class="left">
			<text>网点名称：{{item.service_branch.company_name}}</text>
			<text>网点编号：{{item.service_branch.company_id}}</text>
			<!-- <text>规格：{{item.goods_spec.specs}}</text> -->
			<text>说明：{{item.goods_spec.description}}</text>
		</view>
		<view class="right">
			<view class="mainBox-model-countBox-modelinfo-count">
				<view class="margin-top" @click="operation(item,index,1)">-</view>
				<input class="mainBox-model-countBox-modelinfo-countInput" type="number" v-model.number="item.count < 0 ? 0 : item.count"
				 :disabled="false" @input="countInput($event,index)"/>
				<view class="margin-top" @click="operation(item,index,2)">+</view>
			</view>
		</view>
	</view>
	<view class="btns">
		<tui-button width="220rpx" height="84rpx" type="green " @click="Dayin(item.id,item.count,index)" :disabled="printBtnStatus">打印标签</tui-button>
		<tui-button width="220rpx" height="84rpx" @click="edit(item.id,item.count,index)">确认修改</tui-button>
	</view>
</view>

// 输入数字实时监听
countInput(e,index){
	let _this = this;
	console.log(e.detail.value); //输入的值
	console.log(index); //传参
	_this.PickedList[index].count = e.detail.value;
}