uniapp 封装uview popup弹框

1.需求 项目需要自定义 popup弹框（仿淘宝筛选）
（1）popup 顶端和 底部的button 不动
（2）有查看更多
2.解决方案 popup 顶端 使用粘连定位 sticky 底部button 使用fixed定位，查看更多 可以判断传过来的值如果长度大于一个固定值就显示，点击查看更多赋值所有值，点击隐藏就显示前几个值同时显示加载更多

父组件

<screen :showModal="flag" @close="onclose"></screen>
/*方法接受子组件传递过来的值*/
onclose(show) {
				this.flag = show
			}

子组件

<template>
	<view>
		<u-popup v-model="show" mode="bottom" border-radius="54" height="978rpx" :mask-close-able='true'
			@close="popClose">
			<view class="content">
				<view class="head">
					<view>筛选设备</view>
					<view @click="onClose">
						<u-icon name="close" size="28"></u-icon>
					</view>
				</view>
				<view class="insetContent">
					<view class="inset-title">
						<view>所属客户</view>
						<view>
							<u-icon name="arrow-up" size="28"></u-icon>
						</view>
					</view>
					<view class="inset-list">
						<view class="inset-item" v-for="i in 3">中国移动湖北省公司</view>
						<view class="inset-item">查看更多<u-icon name="arrow-down" size="28"></u-icon></view>
					</view>
					<view class="inset-title">
						<view>所属区域</view>
						<view>
							<u-icon name="arrow-up" size="28"></u-icon>
						</view>
					</view>
					<view class="inset-list">
						<view class="inset-item" v-for="i in 15">湖北省武汉市</view>
						<view class="inset-item">查看更多<u-icon name="arrow-down" size="28"></u-icon></view>
					</view>
				</view>
				<view class="buttons">
					<view class="btnA">重置</view>
					<view class="btnB">完成</view>
				</view>
			</view>
		</u-popup>
	</view>
</template>

<script>
	export default {
		props: {
			showModal: {
				type: Boolean,
			}
		},
		data() {
			return {
				show: false,
			}
		},
		watch: {
			showModal(val) {
				this.show = val
			}
		},
		methods: {
			onClose() {
				this.show = false
				this.$emit('close', this.show)
			},
			/*点击popup遮罩层触发关闭事件将值传递给父组件*/
			popClose() {
				console.log('关闭了窗口')
				this.$emit('close', false)
			}
		}
	}
</script>

<style lang="scss" scoped>
	.content {
		padding: 0rpx 40rpx 160rpx;

		.head {
			display: flex;
			justify-content: space-between;
			align-items: flex-end;
			background: #FFFFFF;
			position: sticky;
			top: 0rpx;
			height: 80rpx;
			z-index: 100;

			>view {
				&:nth-child(1) {
					font-size: 32rpx;
					font-family: PingFangSC-Semibold, PingFang SC;
					font-weight: 600;
					color: #000000;
				}
			}
		}

		.insetContent {
			margin-top: 50rpx;

			.inset-title {
				display: flex;
				justify-content: space-between;
				font-size: 28rpx;
				font-family: PingFangSC-Medium, PingFang SC;
				font-weight: 500;
				color: #000000;
			}

			.inset-list {
				margin-top: 30rpx;
				display: flex;
				flex-wrap: wrap;
				.inset-item {
					font-size: 24rpx;
					font-family: PingFangSC-Regular, PingFang SC;
					font-weight: 400;
					background: #E3EAED;
					border-radius: 4rpx;
					padding: 12rpx 40rpx;
					margin-right: 30rpx;
					margin-bottom: 30rpx;
				}
			}
		}

		.buttons {
			width: 100%;
			display: flex;
			height: 146rpx;
			justify-content: space-between;
			padding: 0 40rpx;
			position: fixed;
			background-color: #FFFFFF;
			bottom: 0;
			left: 0;

			.btnA {
				width: 318rpx;
				height: 90rpx;
				color: #21C0D5;
				display: flex;
				justify-content: center;
				align-items: center;
				border: 2px solid transparent;
				border-radius: 45rpx;
				background-clip: padding-box, border-box;
				background-origin: padding-box, border-box;
				background-image: linear-gradient(to right, #FFFFFF, #FFFFFF), linear-gradient(90deg, #63B2ED, #12C3D0);
			}

			.btnB {
				width: 318rpx;
				height: 90rpx;
				color: #FFFFFF;
				display: flex;
				justify-content: center;
				align-items: center;
				border-radius: 45rpx;
				background: linear-gradient(136deg, #63B2ED 0%, #12C3D0 100%);
			}
		}
	}
</style>