95 lines
		
	
	
		
			3.4 KiB
		
	
	
	
		
			Vue
		
	
	
			
		
		
	
	
			95 lines
		
	
	
		
			3.4 KiB
		
	
	
	
		
			Vue
		
	
	
<template>
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  <!--  聊天虚拟列表  -->
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  <z-paging ref="pagingRef" v-model="messageList" use-chat-record-mode use-virtual-list
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            cell-height-mode="dynamic" default-page-size="20" :auto-clean-list-when-reload="false"
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            safe-area-inset-bottom bottom-bg-color="#f8f8f8" :back-to-top-style="backToTopStyle"
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            :auto-show-back-to-top="showNewMessageTip" @backToTopClick="onBackToTopClick"
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            @scrolltoupper="onScrollToUpper" @query="queryList">
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    <template #top>
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      <!-- 撑一下顶部导航 -->
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      <view style="height: 45px"></view>
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    </template>
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    <!-- style="transform: scaleY(-1)"必须写,否则会导致列表倒置!!! -->
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    <!-- 注意不要直接在chat-item组件标签上设置style,因为在微信小程序中是无效的,请包一层view -->
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    <template #cell="{item,index}">
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      <view style="transform: scaleY(-1)">
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        <!--  消息渲染  -->
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        <MessageListItem :message="item" :message-index="index" :message-list="messageList"></MessageListItem>
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      </view>
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    </template>
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    <!-- 底部聊天输入框 -->
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    <template #bottom>
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      <slot name="bottom"></slot>
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    </template>
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    <!-- 查看最新消息 -->
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    <template #backToTop>
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      <text>有新消息</text>
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    </template>
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  </z-paging>
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</template>
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<script setup>
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  import MessageListItem from '@/pages/chat/components/messageListItem.vue';
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  import { reactive, ref } from 'vue';
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  import KeFuApi from '@/sheep/api/promotion/kefu';
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  import { isEmpty } from '@/sheep/helper/utils';
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  const messageList = ref([]); // 消息列表
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  const showNewMessageTip = ref(false); // 显示有新消息提示
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  const backToTopStyle = reactive({
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    'width': '100px',
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    'background-color': '#fff',
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    'border-radius': '30px',
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    'box-shadow': '0 2px 4px rgba(0, 0, 0, 0.1)',
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    'display': 'flex',
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    'justifyContent': 'center',
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    'alignItems': 'center',
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  }); // 返回顶部样式
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  const queryParams = reactive({
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    pageNo: 1,
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    pageSize: 10,
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  });
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  const pagingRef = ref(null); // 虚拟列表
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  const queryList = async (pageNo, pageSize) => {
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    // 组件加载时会自动触发此方法,因此默认页面加载时会自动触发,无需手动调用
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    // 这里的pageNo和pageSize会自动计算好,直接传给服务器即可
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    queryParams.pageNo = pageNo;
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    queryParams.pageSize = pageSize;
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    await getMessageList();
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  };
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  // 获得消息分页列表
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  const getMessageList = async () => {
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    const { data } = await KeFuApi.getKefuMessagePage(queryParams);
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    if (isEmpty(data.list)) {
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      return;
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    }
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    pagingRef.value.completeByTotal(data.list, data.total);
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  };
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  /** 刷新消息列表 */
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  const refreshMessageList = (message = undefined) => {
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    if (queryParams.pageNo != 1 && message !== undefined) {
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      showNewMessageTip.value = true;
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      // 追加数据
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      pagingRef.value.addChatRecordData([message], false);
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      return;
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    }
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    pagingRef.value.reload();
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  };
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  /** 滚动到最新消息 */
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  const onBackToTopClick = (event) => {
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    event(false); // 禁用默认操作
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    pagingRef.value.scrollToBottom();
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  };
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  /** 监听滚动到底部事件(因为 scroll 翻转了顶就是底) */
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  const onScrollToUpper = () => {
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    // 若已是第一页则不做处理
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    if (queryParams.pageNo === 1) {
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      return;
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    }
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    showNewMessageTip.value = false;
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    // 到底重置消息列表
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    refreshMessageList();
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  };
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  defineExpose({ getMessageList, refreshMessageList });
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</script>
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