<template>
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<div class="drop-down-search" @click.stop>
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<view style="display: flex; align-items: center;">
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<u--input
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@focus="handleFocus"
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@blur="closeDropDown"
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:style="{height: '100%', paddingRight: clear? '60rpx' : '16rpx', display: 'flex' ,padding: '6px 9px', marginLeft:'8px'}"
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v-model="searchText"
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@input="handleSearch"
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clearable
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maxlength="32"
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type="text"
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:placeholder="placeholder"
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prefixIcon="account"
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prefixIconStyle="font-size: 22px;color: #909399"></u--input>
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<text v-if="searchText.length && clear" @click="handleClearInput" class="iconfont icon-shanchu"></text>
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<view
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@click="handleDropDownBox"
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v-if="icon"
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:class="['dropdown-container', { rotated: isDropDownVisible}]"
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></view> <!-- 添加小三角图标 -->
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</view>
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<scroll-view
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:scroll-y="true"
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class="dropdown-scroll"
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:style="{ maxHeight: (isDropDownVisible && hasOptions) ? dropdownHeight + 'rpx' : '0rpx' }">
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<div class="dropdown-content">
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<div v-for="(option, index) in filteredOptions" :key="index" class="option" @click="selectOption(option, $event)">
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{{ option.username }}
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</div>
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</div>
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</scroll-view>
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</div>
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</template>
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<script>
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export default {
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props: {
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options: {
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type: Array,
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default: []
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},
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value: {
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type: [String, Number],
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default: ''
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},
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dropdownHeight: { // 下拉框的高度
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type: Number,
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default: 200
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},
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placeholder: {
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type: String,
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default: ''
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},
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icon: {
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type: Boolean,
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default: true
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},
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clear: {
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type: Boolean,
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default: true,
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}
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},
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data() {
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return {
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searchText: this.value.toString(), // 默认将数字转字符串
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isDropDownVisible: false,
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hasOptions: false,
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};
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},
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computed: {
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// 根据搜索文本过滤选项
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filteredOptions() {
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return this.options.filter(option =>{
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if(this.searchText.username){
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return option.username.toLowerCase().includes(this.searchText.username.toLowerCase())
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}else{
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return option.username.toLowerCase().includes(this.searchText.toLowerCase())
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}
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}
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);
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}
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},
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watch: { // 监听 options 数组，要是输入的东西没有，就关闭下拉框
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searchText() {
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this.hasOptions = (this.filteredOptions.length > 0)
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},
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},
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mounted() {
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// 添加点击外部关闭下拉框的事件监听器
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// document.addEventListener('click', this.closeDropDown.bind(this));
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},
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methods: {
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handleClearInput() { // 清除 input 输入框内容
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this.searchText = ''
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this.$emit('input',''); // 向父组件传递选中的值 // 重新获取新的数据
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},
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handleDropDownBox() { // 控制三角图表事件
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this.isDropDownVisible = !this.isDropDownVisible
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this.hasOptions = (this.filteredOptions.length > 0)
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},
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// 处理搜索事件
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handleSearch(e) {
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this.$emit('input', e); // 向父组件传递选中的值
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this.isDropDownVisible = this.hasOptions;
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},
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handleFocus() {
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this.isDropDownVisible = true;
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this.hasOptions = true;
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},
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// 选择选项
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selectOption(option, event) {
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event.stopPropagation();
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// 处理选项选择逻辑，比如触发事件、更新绑定值等
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this.searchText = option.username; // 选中选项后更新搜索文本
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this.isDropDownVisible = false; // 隐藏下拉框
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this.hasOptions = false;
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this.$emit('changeInput', option); // 向父组件传递选中的值
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},
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// // 获取当前输入的值
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// getSearchText() {
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// return this.searchText;
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// },
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closeDropDown() {
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// 点击事件的目标不包含搜索框或下拉框时，隐藏下拉框
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// this.isDropDownVisible = true;
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// this.hasOptions = true;
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if (!this.$el||!this.$el.contains(event.target)) {
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this.isDropDownVisible = false;
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}
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}
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}
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};
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</script>
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<style scoped>
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.drop-down-search {
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position: relative;
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height: 100% !important;
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}
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.dropdown-scroll {
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position: absolute;
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top: calc(100% + 12rpx);
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left: 0;
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width: 100%;
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background: #fff;
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z-index: 99;
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/* border: 1rpx solid #ccc; */
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box-shadow: 0 14rpx 30rpx rgb(0, 0, 0, 0.1);
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transition: max-height 0.3s ease;
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}
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.dropdown-content {
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padding: 10rpx;
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}
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.option {
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padding: 10rpx;
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cursor: pointer;
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border-bottom: 1rpx solid #ccc;
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}
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input {
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width: 100%;
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padding: 10rpx;
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box-sizing: border-box;
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}
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.iconfont {
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position: absolute;
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top: 50%;
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right: 55rpx;
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font-size: 50rpx;
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transform: translateY(-50%);
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font-size: 20rpx;
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color: #999;
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cursor: pointer;
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}
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.dropdown-container {
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position: relative;
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width: 30rpx;
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height: 30rpx;
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margin-right: 10rpx;
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transform: rotate(180deg);
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}
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.dropdown-container::before {
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content: '';
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position: absolute;
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top: 50%;
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left: 50%;
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transform: translate(-50%, -50%);
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width: 0;
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height: 0;
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border-left: 15rpx solid transparent;
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border-right: 15rpx solid transparent;
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border-bottom: 15rpx solid #ccc; /* 使用border-bottom创建向下的三角形 */
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transition: transform 0.3s ease; /* 添加过渡效果 */
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}
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.rotated::before {
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transform: translate(-50%, -50%) rotate(180deg); /* 旋转三角形 */
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}
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</style>
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