bug

jiangping

2023-11-07 64b432916af9c9218ab3f3eca614e26c542142ae

 minipro_standard/uni_modules/uview-ui/components/u-scroll-list/u-scroll-list.vue

¶Ô±ÈÐÂÎļþ
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<template>
   <view
      class="u-scroll-list"
      ref="u-scroll-list"
   >
      <!-- #ifdef APP-NVUE -->
      <!-- nvue使用bindingX实现，以得到更好的性能 -->
      <scroller
         class="u-scroll-list__scroll-view"
         ref="u-scroll-list__scroll-view"
         scroll-direction="horizontal"
         :show-scrollbar="false"
         :offset-accuracy="1"
         @scroll="nvueScrollHandler"
      >
         <view class="u-scroll-list__scroll-view__content">
            <slot />
         </view>
      </scroller>
      <!-- #endif -->
      <!-- #ifndef APP-NVUE -->
      <!-- #ifdef MP-WEIXIN || APP-VUE || H5 || MP-QQ -->
      <!-- ä»¥ä¸Šå¹³å°ï¼Œæ”¯æŒwxs -->
      <scroll-view
         class="u-scroll-list__scroll-view"
         scroll-x
         @scroll="wxs.scroll"
         @scrolltoupper="wxs.scrolltoupper"
         @scrolltolower="wxs.scrolltolower"
         :data-scrollWidth="scrollWidth"
         :data-barWidth="$u.getPx(indicatorBarWidth)"
         :data-indicatorWidth="$u.getPx(indicatorWidth)"
         :show-scrollbar="false"
         :upper-threshold="0"
         :lower-threshold="0"
      >
         <!-- #endif -->
         <!-- #ifndef APP-NVUE || MP-WEIXIN || H5 || APP-VUE || MP-QQ -->
         <!-- éžä»¥ä¸Šå¹³å°ï¼Œåªèƒ½ä½¿ç”¨æ™®é€šjs实现 -->
         <scroll-view
            class="u-scroll-list__scroll-view"
            scroll-x
            @scroll="scrollHandler"
            @scrolltoupper="scrolltoupperHandler"
            @scrolltolower="scrolltolowerHandler"
            :show-scrollbar="false"
            :upper-threshold="0"
            :lower-threshold="0"
         >
            <!-- #endif -->
            <view class="u-scroll-list__scroll-view__content">
               <slot />
            </view>
         </scroll-view>
         <!-- #endif -->
         <view
            class="u-scroll-list__indicator"
            v-if="indicator"
            :style="[$u.addStyle(indicatorStyle)]"
         >
            <view
               class="u-scroll-list__indicator__line"
               :style="[lineStyle]"
            >
               <view
                  class="u-scroll-list__indicator__line__bar"
                  :style="[barStyle]"
                  ref="u-scroll-list__indicator__line__bar"
               ></view>
            </view>
         </view>
   </view>
</template>

<script
   src="./scrollWxs.wxs"
   module="wxs"
   lang="wxs"
></script>

<script>
/**
 * scrollList æ¨ªå‘滚动列表
 * @description è¯¥ç»„件一般用于同时展示多个商品、分类的场景，也可以完成左右滑动的列表。
 * @tutorial https://www.uviewui.com/components/scrollList.html
 * @property {String | Number}   indicatorWidth         æŒ‡ç¤ºå™¨çš„整体宽度 (默认 50 )
 * @property {String | Number}   indicatorBarWidth      æ»‘块的宽度 (默认 20 )
 * @property {Boolean}         indicator            æ˜¯å¦æ˜¾ç¤ºé¢æ¿æŒ‡ç¤ºå™¨ (默认 true )
 * @property {String}         indicatorColor         æŒ‡ç¤ºå™¨éžæ¿€æ´»é¢œè‰² (默认 '#f2f2f2' )
 * @property {String}         indicatorActiveColor   æŒ‡ç¤ºå™¨çš„激活颜色 (默认 '#3c9cff' )
 * @property {String | Object}   indicatorStyle         æŒ‡ç¤ºå™¨æ ·å¼ï¼Œå¯é€šè¿‡bottom，left，right进行定位
 * @event {Function} left   æ»‘动到左边时触发
 * @event {Function} right   æ»‘动到右边时触发
 * @example
 */
// #ifdef APP-NVUE
const dom = uni.requireNativePlugin('dom')
import nvueMixin from "./nvue.js"
// #endif
import props from './props.js';
export default {
   name: 'u-scroll-list',
   mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
   // #ifdef APP-NVUE
   mixins: [uni.$u.mpMixin, uni.$u.mixin, nvueMixin, props],
   // #endif
   data() {
      return {
         scrollInfo: {
            scrollLeft: 0,
            scrollWidth: 0
         },
         scrollWidth: 0
      }
   },
   computed: {
      // æŒ‡ç¤ºå™¨ä¸ºçº¿åž‹çš„样式
      barStyle() {
         const style = {}
         // #ifndef APP-NVUE || MP-WEIXIN || H5 || APP-VUE || MP-QQ
         // æ­¤ä¸ºæ™®é€šjs方案，只有在非nvue和不支持wxs方案的端才使用、
         // æ­¤å¤„的计算理由为：scroll-view的滚动距离与目标滚动距离(scroll-view的实际宽度减去包裹元素的宽度)之比，等于滑块当前移动距离与总需
         // æ»‘动距离(指示器的总宽度减去滑块宽度)的比值
         const scrollLeft = this.scrollInfo.scrollLeft,
            scrollWidth = this.scrollInfo.scrollWidth,
            barAllMoveWidth = this.indicatorWidth - this.indicatorBarWidth
         const x = scrollLeft / (scrollWidth - this.scrollWidth) * barAllMoveWidth
         style.transform = `translateX(${ x }px)`
         // #endif
         // è®¾ç½®æ»‘块的宽度和背景色，是每个平台都需要的
         style.width = uni.$u.addUnit(this.indicatorBarWidth)
         style.backgroundColor = this.indicatorActiveColor
         return style
      },
      lineStyle() {
         const style = {}
         // æŒ‡ç¤ºå™¨æ•´ä½“的样式，需要设置其宽度和背景色
         style.width = uni.$u.addUnit(this.indicatorWidth)
         style.backgroundColor = this.indicatorColor
         return style
      }
   },
   mounted() {
      this.init()
   },
   methods: {
      init() {
         this.getComponentWidth()
      },
      // #ifndef APP-NVUE || MP-WEIXIN || H5 || APP-VUE || MP-QQ
      // scroll-view触发滚动事件
      scrollHandler(e) {
         this.scrollInfo = e.detail
      },
      scrolltoupperHandler() {
         this.scrollEvent('left')
         this.scrollInfo.scrollLeft = 0
      },
      scrolltolowerHandler() {
         this.scrollEvent('right')
         // åœ¨æ™®é€šjs方案中，滚动到右边时，通过设置this.scrollInfo，模拟出滚动到右边的情况
         // å› ä¸ºä¸Šæ–¹æ˜¯ç”¨è¿‡computed计算的，设置后，会自动调整滑块的位置
         this.scrollInfo.scrollLeft = uni.$u.getPx(this.indicatorWidth) - uni.$u.getPx(this.indicatorBarWidth)
      },
      // #endif
      //
      scrollEvent(status) {
         this.$emit(status)
      },
      // èŽ·å–组件的宽度
      async getComponentWidth() {
         // å»¶æ—¶ä¸€å®šæ—¶é—´ï¼Œä»¥èŽ·å–dom尺寸
         await uni.$u.sleep(30)
         // #ifndef APP-NVUE
         this.$uGetRect('.u-scroll-list').then(size => {
            this.scrollWidth = size.width
         })
         // #endif

         // #ifdef APP-NVUE
         const ref = this.$refs['u-scroll-list']
         ref && dom.getComponentRect(ref, (res) => {
            this.scrollWidth = res.size.width
         })
         // #endif
      },
   }
}
</script>

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

.u-scroll-list {
   padding-bottom: 10px;

   &__scroll-view {
      @include flex;

      &__content {
         @include flex;
      }
   }

   &__indicator {
      @include flex;
      justify-content: center;
      margin-top: 15px;

      &__line {
         width: 60px;
         height: 4px;
         border-radius: 100px;
         overflow: hidden;

         &__bar {
            width: 20px;
            height: 4px;
            border-radius: 100px;
         }
      }
   }
}
</style>