用value绑定输入的值，要通过@input事件监听，这个方法只要input值发生改变就会调用，v-if控制‘清空’这个图标，没值就不显示，我悟了！！！

效果图

<view slot="default" class="search_box">
	<text class="icon_search"></text>
	<input style="width: 280px;" :value="searchName" class="prompt" placeholder="请输入员工姓名" @input="theBlur"></input>
	<text v-if="searchName" class="icon_close" @click="close"></text>
</view>
<sript>
//methods
close:function(){
	this.searchName = ''
	this.queryByInput()
},
theBlur(e){
	console.log(e.target.value)
	this.searchName = e.target.value
	this.queryByInput()//查询列表调用的方法
}
<sript>
<style>
	.search_box {
		width: 400upx;
		height: 64upx;
		background-color: #f5f5f5;
		border-radius: 32upx;
		display: flex;
		align-items: center;
		padding: 0upx 40upx;
		.prompt {
			font-size: 28upx;
			color: #cccccc;
		}
	}
	
	.icon_search {
		background-image: url(../../static/nav/map_ic_search.png);
		background-position: center center;
		background-repeat: no-repeat;
		background-size: cover;
		width: 32upx;
		height: 28upx;
		margin-right: 20upx;
	}
	
	.icon_close {
		background-image: url(../../static/nav/del.png);
		background-position: center center;
		background-repeat: no-repeat;
		background-size: cover;
		width: 32upx;
		height: 28upx;
		margin-right: 10upx;
	}
</style>