siyu_app/components/es-top/es-top.vue

<template>
	<view :style="'height:'+top+'px'" >
		
	</view>
</template>

<script>
	export default {
		name:"es-top",
		data() {
			return {
				top:0,
			};
		},
		created:function(){
			let data = getApp().globalData;
			if(data.__czy_top)
			{
				this.top = data.__czy_top;
			}else{
				uni.getSystemInfo({
					success: (res) => {
						let top = res.safeArea.top;
						data.__czy_top = this.top = top;
					}
				});
			}
		}
	}
</script>

<style>

</style>