样式优化，顶部导航

components/NavBar.vue

@@ -53,7 +53,7 @@
 .header
 	_fj()
 	position fixed
-	_wh(100%, 72rpx)
+	_wh(100%, 88rpx)
 	background-color $red
 	z-index 200
 	padding 0 20rpx

components/upTop.vue

@@ -0,0 +1,49 @@
+<template>
+	<view class="back-top" @tap="toTop" v-show="showBtn">
+		<uni-icons type="up" size="26" color="#9a9a9a"></uni-icons>
+	</view>
+</template>
+
+<script>
+	export default {
+		name:"upTop",
+		data() {
+			return {
+				showBtn: false
+			};
+		},
+		props: {
+			scrollTop: {
+				type: Number,
+				default: 0
+			}
+		},
+		methods: {
+			topData(e) {
+				this.showBtn = e > 50
+			},
+			// 返回顶部
+			toTop() {
+				uni.pageScrollTo({
+					scrollTop: 0,
+					duration: 100
+				})
+			}
+		}
+	}
+</script>
+
+<style lang="stylus" scoped>
+.back-top
+	position: fixed;
+	z-index: 9999;
+	right: 20rpx;
+	bottom: 150rpx;
+	// background-color: rgba(150,150,150,.3);
+	width: 80rpx;
+	height: 80rpx;
+	// line-height: 80rpx;
+	// border-radius: 50%;
+	// text-align: center;
+	// box-shadow: 0 4rpx 16rpx rgba(28,31,35,.3);
+</style>