uniapp封装movable-area+movable-view组件，实现悬浮按钮可拖动，自动吸附边缘效果，自动向两边靠拢

兼容H5、App、微信小程序

子组件

/components/ShopCar/ShopCar.vue

<template><view class="ShopCar"><movable-area class="movableArea" v-if="isShow"><movable-view class="movableView" :position="position" :x="x" :y="y" :direction="direction":damping="damping" @change="onChange" @touchend="onTouchend"><view class="icon-box" @click="handleIcon()"><u-icon name="arrow-upward" color="#ff6a00" size="20"></u-icon></view></movable-view></movable-area></view>
</template><script>export default {props: {damping: {type: Number,default: 10},direction: {type: String,default: "all"},position: {type: Number,default: 4},},data() {return {x: 0,y: 0,x1: 0,x2: 0,y1: 0,y2: 0,move: {x: 0,y: 0},isShow: false}},mounted() {uni.getSystemInfo({success: (res) => {this.x1 = 0;this.x2 = parseInt(res.windowWidth) - 50;this.y1 = 0;this.y2 = parseInt(res.windowHeight) - 20;this.$nextTick(() => {if (this.position == 1 || this.position == 2) this.y = parseInt(this.y2 * 0.2);if (this.position == 3 || this.position == 4) this.y = parseInt(this.y2 * 0.8);if (this.position == 1 || this.position == 3) this.x = parseInt(this.x1);if (this.position == 2 || this.position == 4) this.x = parseInt(this.x2);this.move.x = this.x;this.move.y = this.y;this.isShow = true})}})},methods: {onChange(e) {if (e.detail.source === "touch") {this.move.x = e.detail.x;this.move.y = e.detail.y;}},onTouchend() {this.x = this.move.x;this.y = this.move.y;this.$nextTick(() => {if (this.move.x < this.x2 / 2) this.x = this.x1;else this.x = this.x2;})},handleIcon() {uni.pageScrollTo({scrollTop: 0,duration: 0,});}},}
</script><style lang="scss" scoped>.ShopCar {.movableArea {position: fixed;top: 0;left: 0;width: 100%;height: 100%;pointer-events: none; //设置area元素不可点击，则事件便会下移至页面下层元素z-index: 999;.movableView {width: 70rpx;height: 70rpx;pointer-events: auto;padding: 0 30rpx;.icon-box {width: 100%;height: 100%;display: flex;align-items: center;justify-content: center;border: 1rpx solid #ff6a00;box-sizing: border-box;border-radius: 50%;background-color: #fff;animation: iconBox 5s linear infinite; //进行旋转}@keyframes iconBox {0% {-webkit-transform: rotate(0deg);}25% {-webkit-transform: rotate(90deg);}50% {-webkit-transform: rotate(180deg);}75% {-webkit-transform: rotate(270deg);}100% {-webkit-transform: rotate(360deg);}}}}}
</style>

父组件

<template><ShopCar v-if="scrollTop>200" />
</template><script>export default {data() {return {scrollTop: 0}},onPageScroll(e) {this.scrollTop = e.scrollTop},}
</script>