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@@ -0,0 +1,172 @@
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+<template>
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+ <view>
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+ <view id="_drag_button" class="drag" :style="{top:top+'px',left:left+'px',opacity:firstIn?1:0}"
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+ @touchstart="touchstart" @touchmove.stop.prevent="touchmove" @touchend="touchend"
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+ @click.stop.prevent="click" :class="{transition: isDock && !isMove }">
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+ <button class="btn" style="border: none;padding: 0;margin: 0;">
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+ <image class="img" src="@/static/icon/cart.png" mode="widthFix"></image>
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+ <text>购物车</text>
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+ </button>
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+ </view>
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+ </view>
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+</template>
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+
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+<script>
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+ export default {
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+ name: 'drag-button',
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+ props: {
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+ isDock: {
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+ type: Boolean,
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+ default: false
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+ },
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+ customBar: {
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+ type: Boolean,
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+ default: false
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+ }
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+ },
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+ data() {
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+ return {
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+ top: 0,
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+ left: 0,
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+ width: 0,
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+ height: 0,
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+ offsetWidth: 0,
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+ offsetHeight: 0,
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+ windowWidth: 0,
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+ windowHeight: 0,
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+ isMove: true,
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+ edge: 10,
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+ firstIn: false,
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+ customBarHeight: this.CustomBar
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+ }
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+ },
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+ methods: {
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+ init() {
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+ // 获取手机信息配置接口
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+ const sys = uni.getSystemInfoSync();
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+ // 屏幕的宽高
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+ this.windowWidth = sys.windowWidth;
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+ this.windowHeight = sys.windowHeight;
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+ if (sys.windowTop) {
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+ this.windowHeight += sys.windowTop;
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+ }
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+ // 获取元素
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+ const query = uni.createSelectorQuery().in(this);
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+ query.select('#_drag_button').boundingClientRect(data => {
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+ this.width = data.width;
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+ this.height = data.height;
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+ this.offsetWidth = data.width / 2;
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+ this.offsetHeight = data.height / 2;
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+ // this.left = this.windowWidth - this.width - this.edge;
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+ // this.top = this.windowHeight - this.height - this.edge;
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+
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+ // 若storage无值,设置初始值
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+ if(!uni.getStorageSync('top')) {
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+ uni.setStorageSync("top", this.windowHeight - this.height - this.edge - 100 - (this.customBar ? this.customBarHeight : 0));
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+ }
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+ if(!uni.getStorageSync('left')) {
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+ uni.setStorageSync("left", this.windowWidth - this.width - this.edge);
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+ }
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+
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+ this.left = uni.getStorageSync('left');
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+ this.top = uni.getStorageSync('top') - (this.customBar ? this.customBarHeight : 0);
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+ this.$nextTick(() => {
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+ this.firstIn = true;
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+ })
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+ }).exec();
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+ },
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+ click() {
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+ uni.switchTab({
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+ url:'/pages/cart/index'
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+ })
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+ },
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+ touchstart(e) {
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+
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+ },
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+ touchmove(e) {
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+ // 单指触摸
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+ if (e.touches.length !== 1) {
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+ return false;
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+ }
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+ this.isMove = true;
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+
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+ this.left = e.touches[0].clientX - this.offsetWidth;
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+
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+ let clientY = e.touches[0].clientY - this.offsetHeight;
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+
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+ let edgeBottom = this.windowHeight - this.height - this.edge;
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+
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+ // 上下触及边界
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+ if (clientY < this.edge) {
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+ this.top = this.edge;
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+ } else if (clientY > edgeBottom) {
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+ this.top = edgeBottom;
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+ } else {
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+ this.top = clientY
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+ }
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+ uni.setStorageSync("top", this.top + (this.customBar ? this.customBarHeight : 0));
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+ },
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+ touchend(e) {
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+ if (this.isDock) {
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+ let edgeRigth = this.windowWidth - this.width - this.edge;
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+
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+ if (this.left < this.windowWidth / 2 - this.offsetWidth) {
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+ this.left = this.edge;
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+ } else {
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+ this.left = edgeRigth;
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+ }
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+ }
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+ uni.setStorageSync("left", this.left);
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+ this.isMove = false;
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+ },
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+ }
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+ }
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+</script>
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+
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+<style lang="scss">
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+ .drag {
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+ display: flex;
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+ justify-content: center;
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+ align-items: center;
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+ width: 100rpx;
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+ height: 100rpx;
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+ border-radius: 50%;
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+ font-size: $uni-font-size-sm;
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+ position: fixed;
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+ z-index: 999999;
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+ background: #FFA162;
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+ border: 4rpx solid #FE781F;
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+
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+ &.transition {
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+ transition: left .3s ease, top .3s ease;
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+ }
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+ }
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+
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+ .btn {
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+ background-color: transparent;
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+ width: 100rpx;
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+ height: 100rpx;
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+ border-radius: 50%;
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+ z-index: 9999;
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+ display: flex;
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+ flex-direction: column;
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+ align-items: center;
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+ justify-content: center;
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+ .img {
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+ width: 36rpx;
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+ display: block;
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+ }
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+ text {
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+ font-size: 22rpx;
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+ line-height: 24rpx;
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+ color: #FFFFFF;
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+ margin-top: 8rpx;
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+ }
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+ }
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+
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+ button::after {
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+ border: none;
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+ }
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+
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+</style>
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+
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