kailin_mp/uni_modules/uni-combox/components/uni-combox/uni-combox.vue

<template>
  <view class="uni-combox" :class="border ? '' : 'uni-combox__no-border'">
    <view v-if="label" class="uni-combox__label" :style="labelStyle">
      <text>{{ label }}</text>
    </view>
    <view class="uni-combox__input-box">
      <input class="uni-combox__input" type="text" :placeholder="placeholder" placeholder-class="uni-combox__input-plac" v-model="inputVal" @input="onInput" @focus="onFocus" @blur="onBlur" />
      <uni-icons v-if="!inputVal || !clearAble" :type="showSelector ? 'top' : 'bottom'" size="14" color="#999" @click="toggleSelector"> </uni-icons>
      <uni-icons v-if="inputVal && clearAble" type="clear" size="24" color="#999" @click="clean"> </uni-icons>
    </view>
    <view class="uni-combox__selector" v-if="showSelector" ref="dropdownRef">
      <view class="uni-popper__arrow"></view>
      <scroll-view scroll-y="true" class="uni-combox__selector-scroll">
        <view class="uni-combox__selector-empty" v-if="candidates.length === 0">
          <text>{{ emptyTips }}</text>
        </view>
        <view class="uni-combox__selector-item" v-for="(item, index) in candidates" :key="index" @click="onSelectorClick(item.text, index)">
          <view style="width: 100%" class="text-ellipsis">{{ item.text }}</view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
/**
 * Combox 组合输入框
 * @description 组合输入框一般用于既可以输入也可以选择的场景
 * @tutorial https://ext.dcloud.net.cn/plugin?id=1261
 * @property {String} label 左侧文字
 * @property {String} labelWidth 左侧内容宽度
 * @property {String} placeholder 输入框占位符
 * @property {Array} candidates 候选项列表
 * @property {String} emptyTips 筛选结果为空时显示的文字
 * @property {String} value 组合框的值
 */
export default {
  name: "uniCombox",
  emits: ["input", "update:modelValue", "change"],
  props: {
    clearAble: {
      type: Boolean,
      default: false,
    },
    border: {
      type: Boolean,
      default: true,
    },
    label: {
      type: String,
      default: "",
    },
    labelWidth: {
      type: String,
      default: "auto",
    },
    placeholder: {
      type: String,
      default: "",
    },
    candidates: {
      type: Array,
      default() {
        return [];
      },
    },
    emptyTips: {
      type: String,
      default: "无匹配项",
    },
    // #ifndef VUE3
    value: {
      type: [String, Number],
      default: "",
    },
    // #endif
    // #ifdef VUE3
    modelValue: {
      type: [String, Number],
      default: "",
    },
    // #endif
  },
  data() {
    return {
      showSelector: false,
      inputVal: "",
    };
  },
  computed: {
    labelStyle() {
      if (this.labelWidth === "auto") {
        return "";
      }
      return `width: ${this.labelWidth}`;
    },
    filterCandidates() {
      return this.candidates.filter((item) => {
        return item.toString().indexOf(this.inputVal) > -1;
      });
    },
    filterCandidatesLength() {
      return this.filterCandidates.length;
    },
  },
  watch: {
    // #ifndef VUE3
    value: {
      handler(newVal) {
        this.inputVal = newVal;
      },
      immediate: true,
    },
    // #endif
    // #ifdef VUE3
    modelValue: {
      handler(newVal) {
        this.inputVal = newVal;
      },
      immediate: true,
    },
    // #endif
  },
  methods: {
    toggleSelector() {
      this.showSelector = !this.showSelector;
    },
    onFocus() {
      this.showSelector = true;
    },
    onBlur(event) {
      setTimeout(() => {
        const dropdown = this.$refs.dropdownRef;
        if (dropdown && !dropdown.contains(event.relatedTarget)) {
          this.showSelector = false;
        }
      }, 154);
    },
    onSelectorClick(text, index) {
      this.inputVal = text;
      this.showSelector = false;
      this.$emit("input", this.inputVal, true);
      this.$emit("update:modelValue", this.inputVal);
      this.$emit("change", this.candidates[index]);
    },
    onInput() {
      setTimeout(() => {
        this.$emit("input", this.inputVal, false);
        this.$emit("update:modelValue", this.inputVal);
      });
    },
    onChange(event) {
      this.$emit("change", this.inputValue);
    },
    clean() {
      this.inputVal = "";
      this.onInput();
    },
  },
};
</script>

<style lang="scss" scoped>
.uni-combox {
  font-size: 14px;
  border: 1px solid #dcdfe6;
  padding: 0rpx 20rpx;
  position: relative;
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  // height: 40px;
  flex-direction: row;
  align-items: center;
  // border-bottom: solid 1px #DDDDDD;
  height: 56rpx;
}

.uni-combox__label {
  font-size: 16px;
  line-height: 22px;
  padding-right: 10px;
  color: #999999;
}

.uni-combox__input-box {
  position: relative;
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex: 1;
  flex-direction: row;
  align-items: center;
}

.uni-combox__input {
  flex: 1;
  font-size: 14px;
  height: 22px;
  line-height: 22px;
}

.uni-combox__input-plac {
  font-size: 14px;
  color: #999;
}

.uni-combox__selector {
  /* #ifndef APP-NVUE */
  box-sizing: border-box;
  /* #endif */
  position: absolute;
  bottom: calc(100% + 12px);
  left: 0;
  width: 100%;
  background-color: #ffffff;
  border: 1px solid #ebeef5;
  border-radius: 6px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  z-index: 1000;
  padding: 4px 0;
}

.uni-combox__selector-scroll {
  /* #ifndef APP-NVUE */
  max-height: 100px;
  box-sizing: border-box;
  /* #endif */
}

.uni-combox__selector-empty,
.uni-combox__selector-item {
  /* #ifndef APP-NVUE */
  display: flex;
  cursor: pointer;
  /* #endif */
  line-height: 36px;
  font-size: 14px;
  text-align: center;
  // border-bottom: solid 1px #DDDDDD;
  padding: 0px 10px;
  background-color: #ffffff;
}

.uni-combox__selector-item:hover {
  background-color: #f9f9f9;
}

.uni-combox__selector-empty:last-child,
.uni-combox__selector-item:last-child {
  /* #ifndef APP-NVUE */
  border-bottom: none;
  /* #endif */
}

// picker 弹出层通用的指示小三角
.uni-popper__arrow,
.uni-popper__arrow::after {
  position: absolute;
  display: block;
  width: 0;
  height: 0;
  border-color: transparent;
  border-style: solid;
  border-width: 6px;
}

.uni-popper__arrow {
  filter: drop-shadow(0 2px 12px rgba(0, 0, 0, 0.03));
  bottom: -6px; /* 将 top 改为 bottom */
  left: 10%;
  margin-right: 3px;
  border-bottom-width: 0; /* 将 border-top-width 改为 border-bottom-width */
  border-top-color: #ebeef5; /* 将 border-bottom-color 改为 border-top-color */
}

.uni-popper__arrow::after {
  content: " ";
  bottom: 1px; /* 将 top 改为 bottom */
  margin-left: -6px;
  border-bottom-width: 0; /* 将 border-top-width 改为 border-bottom-width */
  border-top-color: #fff; /* 将 border-bottom-color 改为 border-top-color */
}

.uni-combox__no-border {
  border: none;
}
</style>