頁面代碼

<template>
    <view class="main">
        <scroll-view :scroll-top="0" scroll-y="true" style="height:90vh">
            <view class="box-right">
                <view>
                    <block v-for="item in 15">
                        <view @click="addCar($event)" class="add-btn">
                            加入購物車
                        </view>
                    </block>
                </view>
            </view>
        </scroll-view>
        <cartsBall ref="cartBtn" :endPos="{
                x: 80, y:height
            }"></cartsBall>

    </view>

</template>

<script setup>
    import {
        onMounted,
        ref
    } from "vue";
    import cartsBall from './cartsBall.vue'
    const height = ref(0)
    onMounted(() => {
        height.value = uni.getWindowInfo().windowHeight
    })

    const cartBtn = ref()
    const addCar = (e) => {
        cartBtn.value.drop({
            x: e.detail.x,
            y: e.detail.y
        })
    }
</script>

<style>
    .main {
        height: 90vh;
        background: #cdcdcd;
    }

    .box-right {
        display: flex;
        justify-content: end;
    }
 

    .add-btn {
        display: flex;
        width: 80px;
        height: 50px;
        line-height: 50px;
        background: #a0cfff;
        margin-bottom: 40px;
    }
</style>

cartsBall.vue 組件代碼

<template>
    <view>
        <view class="ball-wrap" v-for="(item, k) of balls" :key="k"
            :style="{
                opacity: item.show,
                top: item.start.y + 'px',
                left: item.start.x + 'px',
                transitionDuration: (item.show?(duration/1000):0)+'s',
                'transition-timing-function': xTimeFunction[!item.ani?0:1],
                transform: 'translate3d('+item.offset.x+'px,0,0)',
                zIndex
            }"
        >
            <view class="ball" :class="{ball3d:is3dSheet}"
                :style="{
                    marginLeft: -size/2 + 'px',
                    marginTop: -size/2 + 'px',
                    padding: size + 'px',
                    backgroundImage: ballImage,
                    backgroundColor: ballColor,
                    transitionDuration: (item.show?(duration/1000):0)+'s',
                    transform: 'translate3d(0,'+item.offset.y+'px,0)',
                    'transition-timing-function': yTimeFunction[item.ani?0:1]
                }"
            ></view>
        </view>
    </view>
</template>

<script>
    // 節(jié)流函數
    function debounce(func, delay, context) {
        return function () {
            func.id && clearTimeout(func.id);
            func.id = setTimeout(() => {
                func.apply(context,arguments)
            }, delay)
        }
    }
    export default {
        props: {
            size: {
                type: Number,
                default: 8
            },
            //3D
            is3dSheet: {
                type: Boolean,
                default: true
            },
            endPos: {
                type: Object,
                default(){
                    return {
                        x: 150,
                        y: 150
                    }
                }
            },
            //持續(xù)時間
            duration: {
                type: Number,
                default: 700
            },
            zIndex: {
                type: Number,
                default: 9999
            },
            ballImage: {
                type: String,
                default: ''
            },
            ballColor: {
                type: String,
                default: 'red'
            }
        },
        data() {
            return {
                balls: [],
                xTimeFunction: ['ease-in', 'ease-out'],
                yTimeFunction: ['cubic-bezier(0.23,-0.1, 0.84,-0.01)', 'cubic-bezier(0, 0.59, 0.46, 2.15)']
            };
        },
        mounted() {
            this.initBalls()
        },
        methods: {
            drop(pos){
                let ball 
                let duration=this.duration
                for (var i = 0; i < this.balls.length; i++) {
                    if(this.balls[i].show){continue}
                    ball = this.balls[i]
                }
                ball.start.x = pos.x
                ball.start.y = pos.y
                ball.offset.x = this.endPos.x - pos.x 
                ball.offset.y = this.endPos.y - pos.y 
                if(ball.offset.y>0){
                    ball.ani = 1
                }else{
                    ball.ani = 0
                }
                ball.show = 1
                
                // 無限加載
                this.balls.push({
                    show: 0,
                    start: {
                        x: 0,
                        y: 0
                    },
                    offset: {
                        x: 0,
                        y: 0
                    },
                    ani: 0
                })
                if(ball.offset.y<120){
                    //y低于120時加速的代碼
                } 
                setTimeout(()=>{
                    ball.show = 0
                }, duration)
                debounce(this.initBalls,  duration+200, this)()
            },
            initBalls(){
                const balls = []
                // 解決微信自帶瀏覽器渲染慢問題死遭，先加載幾個
                for (var i = 0; i < 3; i++) {
                    const ball = {
                        show: 0,
                        start: {
                            x: 0,
                            y: 0
                        },
                        offset: {
                            x: 0,
                            y: 0
                        },
                        ani: 0
                    }
                    balls.push(ball)
                }
                this.balls = balls
            }
        }
    }
</script>

<style lang="scss" scoped>
.ball-wrap {
  position: fixed;
  transform: translateZ(0);
  z-index: 999;
  transition-property: transform;
  pointer-events: none;
  .ball {
    width: 0;
    height: 0;
    padding: 40rpx;
    border-radius: 40rpx;
    overflow: hidden;
    background-repeat: no-repeat;
    background-size: cover;
    transform: translateZ(0);
    transition-property: transform opacity;
    &.ball3d {
      position: relative;
      &::after {
        content: "";
        display: block;
        position: absolute;
        left: -15rpx;
        right: -15rpx;
        top: -15rpx;
        bottom: -15rpx;
        opacity: 0.35;
        background-image: radial-gradient(30% 30%, white, transparent, black);
        background-size: 100%;
        background-repeat: no-repeat;
        background-position: -5rpx -5rpx;
      }
    }
  }
}
</style>