pco/app/uview-ui/components/u-search/u-search.vue

<template>
  <view
      class="u-search"
      @tap="clickHandler"
      :style="[{
			margin: margin,
		}, $u.addStyle(customStyle)]"
  >
    <view
        class="u-search__content"
        :style="{
				backgroundColor: bgColor,
				borderRadius: shape == 'round' ? '100px' : '4px',
				borderColor: borderColor,
				height: height + 'rpx'
			}"
    >
      <template v-if="$slots.label || label !== null">
        <slot name="label">
          <text class="u-search__content__label">{{ label }}</text>
        </slot>
      </template>
      <view class="u-search__content__icon">
        <u-icon
            @tap="clickIcon"
            :size="22"
            :name="searchIcon"
            :color="searchIconColor ? searchIconColor : color"
        ></u-icon>
      </view>
      <input
          confirm-type="search"
          @blur="blur"
          :value="value"
          @confirm="search"
          @input="inputChange"
          :disabled="disabled"
          @focus="getFocus"
          :focus="focus"
          :maxlength="maxlength"
          placeholder-class="u-search__content__input--placeholder"
          :placeholder="placeholder"
          :placeholder-style="`color: ${placeholderColor}`"
          class="u-search__content__input"
          type="text"
          :style="[{
					textAlign: inputAlign,
					color: color,
					backgroundColor: bgColor,
				}, inputStyle]"
      />
      <view
          class="u-search__content__icon u-search__content__close"
          v-if="keyword && clearabled && focused"
          @tap="clear"
      >
        <u-icon
            name="close"
            size="11"
            color="#ffffff"
            customStyle="line-height: 12px"
        ></u-icon>
      </view>
    </view>
    <text
        :style="[actionStyle]"
        class="u-search__action"
        :class="[(showActionBtn || show) && 'u-search__action--active']"
        @tap.stop.prevent="custom"
    >{{ actionText }}
    </text>
  </view>
</template>

<script>
import props from './props.js';

/**
 * search 搜索框
 * @description 搜索组件，集成了常见搜索框所需功能，用户可以一键引入，开箱即用。
 * @tutorial https://www.uviewui.com/components/search.html
 * @property {String}      shape        搜索框形状，round-圆形，square-方形（默认 'round' ）
 * @property {String}      bgColor        搜索框背景颜色（默认 '#f2f2f2' ）
 * @property {String}      placeholder      占位文字内容（默认 '请输入关键字' ）
 * @property {Boolean}      clearabled      是否启用清除控件（默认 true ）
 * @property {Boolean}      focus        是否自动获得焦点（默认 false ）
 * @property {Boolean}      showAction      是否显示右侧控件（默认 true ）
 * @property {Object}      actionStyle      右侧控件的样式，对象形式
 * @property {String}      actionText      右侧控件文字（默认 '搜索' ）
 * @property {String}      inputAlign      输入框内容水平对齐方式 （默认 'left' ）
 * @property {Object}      inputStyle      自定义输入框样式，对象形式
 * @property {Boolean}      disabled      是否启用输入框（默认 false ）
 * @property {String}      borderColor      边框颜色，配置了颜色，才会有边框 (默认 'transparent' )
 * @property {String}      searchIconColor    搜索图标的颜色，默认同输入框字体颜色 (默认 '#909399' )
 * @property {String}      color        输入框字体颜色（默认 '#606266' ）
 * @property {String}      placeholderColor  placeholder的颜色（默认 '#909399' ）
 * @property {String}      searchIcon      输入框左边的图标，可以为uView图标名称或图片路径  (默认 'search' )
 * @property {String}      margin        组件与其他上下左右元素之间的距离，带单位的字符串形式，如"30px"   (默认 '0' )
 * @property {Boolean}      animation      是否开启动画，见上方说明（默认 false ）
 * @property {String}      value        输入框初始值
 * @property {String | Number}  maxlength      输入框最大能输入的长度，-1为不限制长度  (默认 '-1' )
 * @property {String | Number}  height        输入框高度，单位px（默认 64 ）
 * @property {String | Number}  label        搜索框左边显示内容
 * @property {Object}      customStyle      定义需要用到的外部样式
 *
 * @event {Function} change 输入框内容发生变化时触发
 * @event {Function} search 用户确定搜索时触发，用户按回车键，或者手机键盘右下角的"搜索"键时触发
 * @event {Function} custom 用户点击右侧控件时触发
 * @event {Function} clear 用户点击清除按钮时触发
 * @example <u-search placeholder="日照香炉生紫烟" v-model="keyword"></u-search>
 */
export default {
  name: "u-search",
  mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
  data() {
    return {
      keyword: '',
      showClear: false, // 是否显示右边的清除图标
      show: false,
      // 标记input当前状态是否处于聚焦中，如果是，才会显示右侧的清除控件
      focused: this.focus
      // 绑定输入框的值
      // inputValue: this.value
    };
  },
  watch: {
    keyword(nVal) {
      // 双向绑定值，让v-model绑定的值双向变化
      this.$emit('input', nVal);
      // 触发change事件，事件效果和v-model双向绑定的效果一样，让用户多一个选择
      this.$emit('change', nVal);
    },
    value: {
      immediate: true,
      handler(nVal) {
        this.keyword = nVal;
      }
    }
  },
  computed: {
    showActionBtn() {
      return !this.animation && this.showAction
    }
  },
  methods: {
    // 目前HX2.6.9 v-model双向绑定无效，故监听input事件获取输入框内容的变化
    inputChange(e) {
      this.keyword = e.detail.value;
    },
    // 清空输入
    // 也可以作为用户通过this.$refs形式调用清空输入框内容
    clear() {
      this.keyword = '';
      // 延后发出事件，避免在父组件监听clear事件时，value为更新前的值(不为空)
      this.$nextTick(() => {
        this.$emit('clear');
      })
    },
    // 确定搜索
    search(e) {
      this.$emit('search', e.detail.value);
      try {
        // 收起键盘
        uni.hideKeyboard();
      } catch (e) {
      }
    },
    // 点击右边自定义按钮的事件
    custom() {
      this.$emit('custom', this.keyword);
      try {
        // 收起键盘
        uni.hideKeyboard();
      } catch (e) {
      }
    },
    // 获取焦点
    getFocus() {
      this.focused = true;
      // 开启右侧搜索按钮展开的动画效果
      if (this.animation && this.showAction) this.show = true;
      this.$emit('focus', this.keyword);
    },
    // 失去焦点
    blur() {
      // 最开始使用的是监听图标@touchstart事件，自从hx2.8.4后，此方法在微信小程序出错
      // 这里改为监听点击事件，手点击清除图标时，同时也发生了@blur事件，导致图标消失而无法点击，这里做一个延时
      setTimeout(() => {
        this.focused = false;
      }, 100)
      this.show = false;
      this.$emit('blur', this.keyword);
    },
    // 点击搜索框，只有disabled=true时才发出事件，因为禁止了输入，意味着是想跳转真正的搜索页
    clickHandler() {
      if (this.disabled) this.$emit('click');
    },
    // 点击左边图标
    clickIcon() {
      this.$emit('clickIcon');
    }
  }
}
</script>

<style lang="scss" scoped>
@import "../../libs/css/components.scss";

$u-search-content-padding: 0 10px !default;
$u-search-label-color: $u-main-color !default;
$u-search-label-font-size: 14px !default;
$u-search-label-margin: 0 4px !default;
$u-search-close-size: 20px !default;
$u-search-close-radius: 100px !default;
$u-search-close-bgColor: #C6C7CB !default;
$u-search-close-transform: scale(0.82) !default;
$u-search-input-font-size: 14px !default;
$u-search-input-margin: 0 5px !default;
$u-search-input-color: $u-main-color !default;
$u-search-input-placeholder-color: $u-tips-color !default;
$u-search-action-font-size: 14px !default;
$u-search-action-color: $u-main-color !default;
$u-search-action-width: 0 !default;
$u-search-action-active-width: 40px !default;
$u-search-action-margin-left: 5px !default;

/* #ifdef H5 */
// iOS15在H5下，hx的某些版本，input type=search时，会多了一个搜索图标，进行移除
[type="search"]::-webkit-search-decoration {
  display: none;
}

/* #endif */

.u-search {
  @include flex(row);
  align-items: center;
  flex: 1;

  &__content {
    @include flex;
    align-items: center;
    padding: $u-search-content-padding;
    flex: 1;
    justify-content: space-between;
    border-width: 1px;
    border-color: transparent;
    border-style: solid;

    &__icon {
      @include flex;
      align-items: center;
    }

    &__label {
      color: $u-search-label-color;
      font-size: $u-search-label-font-size;
      margin: $u-search-label-margin;
    }

    &__close {
      width: $u-search-close-size;
      height: $u-search-close-size;
      border-top-left-radius: $u-search-close-radius;
      border-top-right-radius: $u-search-close-radius;
      border-bottom-left-radius: $u-search-close-radius;
      border-bottom-right-radius: $u-search-close-radius;
      background-color: $u-search-close-bgColor;
      @include flex(row);
      align-items: center;
      justify-content: center;
      transform: $u-search-close-transform;
    }

    &__input {
      flex: 1;
      font-size: $u-search-input-font-size;
      line-height: 1;
      margin: $u-search-input-margin;
      color: $u-search-input-color;

      &--placeholder {
        color: $u-search-input-placeholder-color;
      }
    }
  }

  &__action {
    font-size: $u-search-action-font-size;
    color: $u-search-action-color;
    width: $u-search-action-width;
    overflow: hidden;
    transition-property: width;
    transition-duration: 0.3s;
    /* #ifndef APP-NVUE */
    white-space: nowrap;
    /* #endif */
    text-align: center;

    &--active {
      width: $u-search-action-active-width;
      margin-left: $u-search-action-margin-left;
    }
  }
}
</style>