vue3 数字滚动效果

效果图

代码

<template>
  <div class="number-scroller">
    <div
      class="viewport"
      :style="{ width: width + 'px', height: height + 'px' }"
    >
      <div class="number-scroller-box" ref="num">
        <div v-for="number in numbers" :key="number" class="number-item">
          {{ number }}
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref, onMounted, watch } from 'vue';

const props = defineProps({
  width: {
    type: Number,
    default: 60
  },
  height: {
    type: Number,
    default: 60
  },
  // 目标数字
  targetNumber: {
    type: Number,
    default: 5
  },
  // 动画持续时间
  animationDuration: {
    type: Number,
    default: 10
  },
  // 动画缓动函数
  easing: {
    type: String,
    default: 'cubic-bezier(.5,.13,.01,.35)'
  },
  // 动画延迟时间
  delay: {
    type: Number,
    default: 1
  },
  // 旋转方向
  direction: {
    type: String,
    default: 'vertical', // 默认横向旋转
    validator: value => ['horizontal', 'vertical'].includes(value)
  }
});

const numbers = ref([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
const num = ref();

/**
 * rotateToTarget 旋转到目标数字
 */
function rotateToTarget (targetNumber, direction) {
  const angle = 360 / numbers.value.length;
  const targetIndex = numbers.value.indexOf(targetNumber);
  if (targetIndex === -1) return; // 如果目标数字不存在，直接返回
  const randomCircles = Math.floor(Math.random() * 3) + 1; // 随机生成1到3圈
  const totalAngle = 360 * randomCircles - targetIndex * angle;
  const rotateAxis = direction === 'horizontal' ? 'Y' : 'X';
  document.body.getBoundingClientRect();
  num.value.style.transition = `transform ${props.animationDuration}s ${props.easing} ${props.delay}s`;
  num.value.style.transform = `rotate${rotateAxis}(${totalAngle}deg)`;
}
/**
 * layout 页面布局
 */
const layout = () => {
  const angle = 360 / numbers.value.length;
  const radius = props.width / (2 * Math.sin(Math.PI / numbers.value.length)); // 旋转半径计算

  numbers.value.forEach((_, index) => {
    const item = num.value.children[index];
    const rotateAxis = props.direction === 'horizontal' ? 'Y' : 'X';
    item.style.transform = `rotate${rotateAxis}(${index * angle}deg) translateZ(${radius}px)`;
  });
}

onMounted(() => {
  layout()
  rotateToTarget(props.targetNumber, props.direction);
});
</script>

<style lang="less" scoped>
.number-scroller {
  display: flex;
  align-items: center;
  position: relative;
  perspective: 1000px;

  .viewport {
    overflow: hidden;
    position: relative;
  }
  .number-scroller-box {
    position: relative;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    box-sizing: border-box;
    transition: all 3s;
    .number-item {
      position: absolute;
      left: 0;
      top: 0;
      box-sizing: border-box;
      width: 100%;
      height: 100%;
      line-height: 100%;
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      backface-visibility: hidden;
    }
  }
}
</style>