网站建设的安全应该注意什么苏州三大建筑设计院

在实际业务中，我们经常遇到「标签排序」或「菜单调整」的场景。微信小程序原生的 movable-view 为我们提供了一个简单、高效的拖拽能力，结合 Vue3 + uni-app 的组合，我们可以实现一个体验良好的标签管理界面。

核心组件：<movable-view>、<movable-area>

1.每项数据结构加入 y 坐标

const itemHeight = uni.upx2px(110); // 每项高度，决定拖动步长function initDragg(list) {return list.map((item, index) => ({...item,y: index * itemHeight, // 初始位置}));
}

2. 拖动状态管理变量

const canDrag = ref(false);          // 当前是否允许拖动（长按才激活）
const draggingIndex = ref(-1);       // 当前拖动的 item 的 index

3.用户手指按下某项

<image@touchstart="canDrag = true":src="getSpecImgUrl('sort_set')"
/>

4.进入拖动状态

function onTouchStart(index) {if (!canDrag.value) return;draggingIndex.value = index;
}

5.拖动过程中（自动触发）

function onChange(e, index) {const dy = e.detail.y;const targetIndex = Math.round(dy / itemHeight);if (targetIndex !== index && targetIndex >= 0 && targetIndex < groupList.value.length) {// 拖动项移到新位置const moved = groupList.value.splice(index, 1)[0];groupList.value.splice(targetIndex, 0, moved);draggingIndex.value = targetIndex;} else {// 仅移动视觉，不换位置groupList.value[index].y = dy;}
}

6.拖动结束

function onTouchEnd() {if (!canDrag.value) return;draggingIndex.value = -1;// 所有项重置为标准位置groupList.value.forEach((item, i) => {item.y = i * itemHeight;});// 同步顺序到后端sortLabelList(groupList.value);canDrag.value = false;
}

完整代码测试代码

<template><scroll-view scroll-y style="height: 100vh"><movable-area style="height: 1000rpx; width: 100vw; position: relative"><block v-for="(item, index) in list" :key="item.id"><movable-viewdirection="vertical"damping="50"inertia:y="item.y":style="getStyle(index)"@touchstart="onTouchStart(index)"@touchend="onTouchEnd"@change="onChange($event, index)"><view class="item">{{ item.name }}</view></movable-view></block></movable-area></scroll-view>
</template><script setup>import { ref, reactive, onMounted } from 'vue';import { debounce } from '@/utils/util';const itemHeight = 100; // 每项高度，单位 rpx（需配合实际样式调整）const list = reactive([{ id: 1, name: '任务一', y: 0 },{ id: 2, name: '任务二', y: 100 },{ id: 3, name: '任务三', y: 200 },{ id: 4, name: '任务四', y: 300 },]);let draggingIndex = ref(-1);function onTouchStart(index) {draggingIndex.value = index;}function onTouchEnd(e, index) {console.log(444);draggingIndex.value = -1;// 重置 Y 防止漂移list.forEach((item, i) => {item.y = i * itemHeight;});}// 拖拽过程中计算是否需要交换function onChange(e, index) {// const bounce = debounce(foo,500);// bounce()const dy = e.detail.y;const targetIndex = Math.round(dy / itemHeight);console.log(2222,e,index,targetIndex);if (targetIndex !== index &&targetIndex >= 0 &&targetIndex < list.length) {console.log(3333);// 交换数据const moved = list.splice(index, 1)[0];list.splice(targetIndex, 0, moved);// 重新设置 y 值// list.forEach((item, i) => {//   item.y = i * itemHeight;// });draggingIndex.value = targetIndex;} else {list[index].y = dy;}}function getStyle(index) {return `position: absolute; left: 0; width: 100%; height: ${itemHeight}rpx; z-index: ${draggingIndex.value === index ? 10 : 1};`;}
</script><style scoped>.item {background-color: #f1f1f1;margin: 10rpx;border-radius: 10rpx;text-align: center;line-height: 100rpx;box-shadow: 0 2rpx 10rpx rgba(0, 0, 0, 0.1);}
</style>