增加晶全app静态页面

node_modules/vk-uview-ui/components/u-back-top/u-back-top.vue

@@ -0,0 +1,153 @@
+<template>
+	<view @tap="backToTop" class="u-back-top" :class="['u-back-top--mode--' + mode]" :style="[{
+		bottom: bottom + 'rpx',
+		right: right + 'rpx',
+		borderRadius: mode == 'circle' ? '10000rpx' : '8rpx',
+		zIndex: uZIndex,
+		opacity: opacity
+	}, customStyle]">
+		<view class="u-back-top__content" v-if="!$slots.default && !$slots.$default">
+			<u-icon @click="backToTop" :name="icon" :custom-style="iconStyle"></u-icon>
+			<view class="u-back-top__content__tips">
+				{{tips}}
+			</view>
+		</view>
+		<slot v-else />
+	</view>
+</template>
+
+<script>
+	export default {
+		name: 'u-back-top',
+		props: {
+			// 返回顶部的形状，circle-圆形，square-方形
+			mode: {
+				type: String,
+				default: 'circle'
+			},
+			// 自定义图标
+			icon: {
+				type: String,
+				default: 'arrow-upward'
+			},
+			// 提示文字
+			tips: {
+				type: String,
+				default: ''
+			},
+			// 返回顶部滚动时间
+			duration: {
+				type: [Number, String],
+				default: 100
+			},
+			// 滚动距离
+			scrollTop: {
+				type: [Number, String],
+				default: 0
+			},
+			// 距离顶部多少距离显示，单位rpx
+			top: {
+				type: [Number, String],
+				default: 400
+			},
+			// 返回顶部按钮到底部的距离，单位rpx
+			bottom: {
+				type: [Number, String],
+				default: 200
+			},
+			// 返回顶部按钮到右边的距离，单位rpx
+			right: {
+				type: [Number, String],
+				default: 40
+			},
+			// 层级
+			zIndex: {
+				type: [Number, String],
+				default: '9'
+			},
+			// 图标的样式，对象形式
+			iconStyle: {
+				type: Object,
+				default() {
+					return {
+						color: '#909399',
+						fontSize: '38rpx'
+					}
+				}
+			},
+			// 整个组件的样式
+			customStyle: {
+				type: Object,
+				default() {
+					return {}
+				}
+			}
+		},
+		watch: {
+			showBackTop(nVal, oVal) {
+				// 当组件的显示与隐藏状态发生跳变时，修改组件的层级和不透明度
+				// 让组件有显示和消失的动画效果，如果用v-if控制组件状态，将无设置动画效果
+				if(nVal) {
+					this.uZIndex = this.zIndex;
+					this.opacity = 1;
+				} else {
+					this.uZIndex = -1;
+					this.opacity = 0;
+				}
+			}
+		},
+		computed: {
+			showBackTop() {
+				// 由于scrollTop为页面的滚动距离，默认为px单位，这里将用于传入的top(rpx)值
+				// 转为px用于比较，如果滚动条到顶的距离大于设定的距离，就显示返回顶部的按钮
+				return this.scrollTop > uni.upx2px(this.top);
+			},
+		},
+		data() {
+			return {
+				// 不透明度，为了让组件有一个显示和隐藏的过渡动画
+				opacity: 0,
+				// 组件的z-index值，隐藏时设置为-1，就会看不到
+				uZIndex: -1
+			}
+		},
+		methods: {
+			backToTop() {
+				uni.pageScrollTo({
+					scrollTop: 0,
+					duration: this.duration
+				});
+			}
+		}
+	}
+</script>
+
+<style lang="scss" scoped>
+	@import "../../libs/css/style.components.scss";
+	
+	.u-back-top {
+		width: 80rpx;
+		height: 80rpx;
+		position: fixed;
+		z-index: 9;
+		@include vue-flex;
+		flex-direction: column;
+		justify-content: center;
+		background-color: #E1E1E1;
+		color: $u-content-color;
+		align-items: center;
+		transition: opacity 0.4s;
+		
+		&__content {
+			@include vue-flex;
+			flex-direction: column;
+			align-items: center;
+			
+			&__tips {
+				font-size: 24rpx;
+				transform: scale(0.8);
+				line-height: 1;
+			}
+		}
+	}
+</style>