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| <template>
| <view class="dropdown-container" :style="{ '--theme-color': themeColor }">
| <!-- 触发按钮 -->
| <view class="dropdown-trigger" @click="toggleDropdown">
| <uni-icons type="more-filled" size="20" color="#666"></uni-icons>
| <view class="dropdown-icon" :class="{ 'rotate': isOpen }">
| <uni-icons type="arrowdown" size="16" color="#666"></uni-icons>
| </view>
| </view>
|
| <!-- 下拉菜单 -->
| <view
| class="dropdown-menu"
| :class="[placementClass]"
| v-if="isOpen"
| @click.stop
| >
| <scroll-view scroll-y class="dropdown-scroll" :style="{ maxHeight: maxHeight + 'px' }">
| <view
| v-for="(item, index) in options"
| :key="index"
| class="dropdown-item"
| @click="selectItem(item)"
| >
| <text>{{ item[labelKey] }}</text>
| </view>
| </scroll-view>
| </view>
|
| <!-- 遮罩层 -->
| <view
| class="dropdown-mask"
| v-if="isOpen"
| @click="closeDropdown"
| ></view>
| </view>
| </template>
|
| <script>
| export default {
| name: 'DropdownMenu',
| props: {
| // 业务数据，选中菜单后一同返回
| data: {
| type: Object
| },
| // 选项列表
| options: {
| type: Array,
| default: () => []
| },
| // 选项对象中显示文本的key
| labelKey: {
| type: String,
| default: 'label'
| },
| // 选项对象中值的key
| valueKey: {
| type: String,
| default: 'command'
| },
| // 主题颜色
| themeColor: {
| type: String,
| default: '#409EFF'
| },
| // 下拉菜单最大高度
| maxHeight: {
| type: Number,
| default: 300
| },
| // 菜单弹出位置（top/bottom）
| placement: {
| type: String,
| default: 'bottom',
| validator: (value) => ['top', 'bottom'].includes(value)
| }
| },
| data() {
| return {
| isOpen: false,
| selectedItem: null
| }
| },
| computed: {
| placementClass() {
| return `placement-${this.placement}`;
| }
| },
| methods: {
| toggleDropdown() {
| this.isOpen = !this.isOpen
| if (this.isOpen) {
| this.$emit('open')
| } else {
| this.$emit('close')
| }
| },
| closeDropdown() {
| this.isOpen = false
| this.$emit('close')
| },
| selectItem(item) {
| this.selectedItem = item
| this.closeDropdown()
|
| // 根据配置返回整个对象或value值
| const emitValue = typeof item === 'object' ? item[this.valueKey] : item
| this.$emit('input', emitValue)
| this.$emit('change', emitValue, this.data)
| }
| }
| }
| </script>
|
| <style lang="scss" scoped>
| .dropdown-container {
| position: relative;
| display: inline-block;
| z-index: 10;
| }
|
| .dropdown-trigger {
| height: 70rpx;
| line-height: 70rpx;
| border-radius: 8rpx;
| background-color: #fff;
| box-sizing: border-box;
| cursor: pointer;
|
| &:active {
| opacity: 0.8;
| }
| }
|
| .dropdown-text {
| flex: 1;
| font-size: 28rpx;
| color: #333;
| overflow: hidden;
| text-overflow: ellipsis;
| white-space: nowrap;
| }
|
| .dropdown-icon {
| transition: transform 0.3s;
| margin-left: 10rpx;
|
| &.rotate {
| transform: rotate(180deg);
| }
| }
|
| .dropdown-menu {
| position: absolute;
| left: -50rpx;
| display: inline-block;
| white-space: nowrap;
| background-color: #fff;
| border: 1rpx solid #EBEEF5;
| border-radius: 8rpx;
| // box-shadow: 0 2rpx 12rpx 0 rgba(0, 0, 0, 0.1);
| z-index: 100;
| overflow: hidden;
|
| &.placement-bottom {
| top: 80rpx;
| }
|
| &.placement-top {
| bottom: 80rpx;
| }
| }
|
| .dropdown-scroll {
| width: 100%;
| }
|
| .dropdown-item {
| display: flex;
| align-items: center;
| justify-content: space-between;
| padding: 0 20rpx;
| height: 80rpx;
| line-height: 80rpx;
| font-size: 28rpx;
| color: #606266;
|
| &:active {
| background-color: #f5f7fa;
| }
|
| &.active {
| color: var(--theme-color);
| font-weight: bold;
| }
| }
|
| .dropdown-mask {
| position: fixed;
| top: 0;
| left: 0;
| right: 0;
| bottom: 0;
| background-color: transparent;
| z-index: 99;
| }
| </style>
|
|
