storevisit-ui-mobile/src/components/share.vue

<template>
  <div class="share">
    <div class="share-content" ref="shareContent" v-if="!canvasImageUrl">
      <div class="header">
        <div class="left-icon">
          <img :src="require('@/assets/shareLeft.png')" />
        </div>
        <div class="right-icon">
          <img :src="require('@/assets/shareRight.png')" />
        </div>
      </div>
      <div class="summaryDay">
        <div class="title-box">
          <div class="title">
            <div class="name">{{ reportTarget.nickName }}的日报</div>
            <div class="date">
              {{
                reportTarget.commitTime
                  ? formatChineseDate(reportTarget.commitTime.split(' ')[0])
                  : ''
              }}
            </div>
          </div>
        </div>
        <template
          v-for="(item, index) in reportTarget.reportContents"
          v-if="reportTarget.reportContents && reportTarget.reportContents.length > 0">
          <div :class="['text', 'text' + index]">{{ filterText(index) }}</div>
          <div class="content">{{ item.dayContent }}</div>
        </template>
        <div class="text">今日拜访照片</div>
        <div class="content-photos">
          <template v-for="item in photosData">
            <template v-for="item1 in item.photos" v-if="item1.base64Url">
              <img
                :src="'data:image/jpg;base64,' + item1.base64Url"
                crossorigin="anonymous"
                referrerpolicy="no-referrer"
                alt=""
                style="display: block" />
            </template>
          </template>
          <!-- <template v-for="item in photosData">
            <img
              :src="'data:image/jpg;base64,' + item"
              crossorigin="anonymous"
              referrerpolicy="no-referrer"
              alt=""
              style="display: block" />
          </template> -->
        </div>
      </div>
      <div class="footerShare">
        <div class="QRcodes" ref="QRcodes">
          <div class="logo">
            <img :src="require('@/assets/logo1.png')" />
          </div>
        </div>
        <div class="right-text">
          <div>长按识别二维码</div>
          <div>查看详情&点评</div>
        </div>
      </div>
    </div>
    <div class="html2canvasBox">
      <div class="closeShare" @click="closeShare"><van-icon name="close" /></div>
      <div id="html2canvas" ref="html2canvas">
        <div class="scroll-container">
          <img :src="canvasImageUrl" width="100%" />
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import html2canvas from 'html2canvas';
import QRCode from 'qrcodejs2';
import { getReportImg } from '@/api/index';
export default {
  name: 'share',
  props: {
    reportTarget: {
      type: Object,
      default() {
        return {};
      },
    },
    reportId: {
      type: [String, Number],
    },
  },
  data() {
    return {
      canvasImageUrl: '',
      retryCount: 0,
      photosData: [],
    };
  },
  created() {
    this.canvasImageUrl = '';
  },
  mounted() {
    this.toastLoading(0, '生成中...', true);
    // 二维码
    this.creatQrCode();
    getReportImg({ reportId: this.reportId }).then((res) => {
      if (res.data) {
        this.photosData = res.data;
        this.$nextTick(async () => {
          await this.htmlToCanvas();
        });
      }
    });
    // 使用Promise.all确保所有图片加载完成
    // const photos = this.reportTarget.photos;
    // const photoPromises = [];

    // // 收集所有图片转换的Promise
    // photos.forEach((item) => {
    //   item.photos.forEach((photo) => {
    //     photoPromises.push(this.imageUrlToBase64(photo.fileUrl));
    //   });
    // });

    // // 等待所有图片加载完成
    // Promise.all(photoPromises)
    //   .then((photosArr) => {
    //     this.photosData = photosArr;
    //     this.$nextTick(async () => {
    //       // await this.htmlToCanvas();
    //     });
    //   })
    //   .catch((error) => {
    //     console.error('图片加载失败:', error);
    //     this.$toast('图片加载失败，请检查网络');
    //   });
    // console.log(photos);

    // 优化touch事件处理
    this.setupTouchHandlers();
  },
  methods: {
    //异步执行
    imageUrlToBase64(imageUrl) {
      return new Promise((resolve, reject) => {
        //一定要设置为let，不然图片不显示
        let image = new Image();

        //解决跨域问题
        image.setAttribute('crossOrigin', 'anonymous');

        image.src = imageUrl;

        //image.onload为异步加载
        image.onload = () => {
          var canvas = document.createElement('canvas');
          canvas.width = image.width;
          canvas.height = image.height;
          var context = canvas.getContext('2d');
          context.drawImage(image, 0, 0, image.width, image.height);

          var quality = 1;
          //这里的dataurl就是base64类型
          let dataURL = canvas.toDataURL('image/png', quality); //使用toDataUrl将图片转换成jpeg的格式,不要把图片压缩成png，因为压缩成png后base64的字符串可能比不转换前的长！
          resolve(dataURL);
        };

        image.onerror = () => {
          reject(new Error('图像加载失败'));
        };
      });
    },
    filterText(index) {
      if (index == 0) {
        return '明日工作计划';
      } else {
        return '今日机会与挑战总结';
      }
    },
    htmlToCanvas() {
      html2canvas(this.$refs.shareContent, {
        scale: window.devicePixelRatio || 1,
        useCORS: true,
        allowTaint: false,
        backgroundColor: null,
        logging: false, // 关闭日志提升性能
        onclone: (clonedDoc) => {
          // 确保克隆的DOM保持原始样式
          clonedDoc.getElementById('html2canvas').style.overflow = 'auto';
        },
      })
        .then((canvas) => {
          this.toastLoading().clear();
          let imageUrl = canvas.toDataURL('image/png');
          this.canvasImageUrl = imageUrl;

          // 图片加载完成后设置滚动容器高度
          const img = new Image();
          img.onload = () => {
            const scrollContainer = this.$refs.html2canvas.querySelector('.scroll-container');
            // 根据图片实际高度设置容器高度（增加20px缓冲）
            // 根据设备像素比调整图片高度
            // 使用实际渲染高度而非原始图片高度
            const imgHeight = img.offsetHeight + 20;
            // 设置容器最小高度保证内容显示，同时允许自动扩展
            scrollContainer.style.minHeight = `${imgHeight}px`;
            // 保持父容器为可见滚动
            scrollContainer.parentElement.style.overflow = 'visible';
            // 强制浏览器重排
            scrollContainer.style.display = 'none';
            scrollContainer.offsetHeight; // 触发重排
            scrollContainer.style.display = 'block';

            // 添加移动端滚动优化
            requestAnimationFrame(() => {
              scrollContainer.style.overflow = 'auto';
              scrollContainer.style.overflowScrolling = 'touch';
              scrollContainer.style.webkitOverflowScrolling = 'touch';
              scrollContainer.style.overscrollBehavior = 'contain';
              scrollContainer.style.touchAction = 'pan-y';
            });

            // 重新绑定触摸事件
            this.setupTouchHandlers();
          };
          img.src = imageUrl;

          this.$emit('setShareImg', true);
        })
        .catch((error) => {
          this.toastLoading().clear();
          console.error('html2canvas error:', error);
          this.$toast('生成分享图失败，请稍后重试');
        });
    },
    creatQrCode() {
      let devText = 'https://suishenbangtest.nipponpaint.com.cn/homeIndex';
      let proText = 'https://suishenbang.nipponpaint.com.cn/homeIndex';
      let text = process.env.NODE_ENV == 'development' ? devText : proText;
      var qrcode = new QRCode(this.$refs.QRcodes, {
        text: text + '?reportId=' + this.reportId || '', // 需要转换为二维码的内容
        colorDark: '#000000',
        colorLight: '#ffffff',
        correctLevel: QRCode.CorrectLevel.H,
        width: 50,
        height: 50,
      });
    },
    closeShare() {
      this.canvasImageUrl = '';
      this.$emit('setShareImg', false);
    },
  },
};
</script>
<style lang="scss" scoped>
.share {
  width: 100%;
  height: 100%;
  overflow: hidden;
  // position: fixed;
  // top: 0;
  // z-index: -1;
  // overflow-y: auto;

  .share-content {
    background: url('../assets/shareBack.png') no-repeat center center;
    background-size: cover;
    background-attachment: local;
    width: 100%;
    // height: 100%;
    padding: vw(30);
    position: absolute;
    // z-index: -1;
    padding-bottom: vw(190);
    top: 0;
    z-index: -1;
  }

  .header {
    display: flex;
    justify-content: space-between;

    .left-icon {
      width: vw(114);
      height: vw(71);
    }

    .right-icon {
      width: vw(230);
      height: vw(78);
    }

    img {
      width: 100%;
      height: 100%;
    }
  }
  .title-box {
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: -6px;
    left: 50%;
    margin-left: vw(-169);
    .title {
      color: #600d0e;
      font-size: vw(36);
      font-weight: bold;
      // margin-top: vw(81);
      //   width: vw(338);
      //   height: vw(115);
      text-align: center;
      background: url('../assets/titleBack.png') no-repeat;
      background-size: 100% 100%;
      padding: vw(20) vw(30);
    }
  }

  .summaryDay {
    background: url('../assets/summaryDay.png') no-repeat;
    background-size: 100%;
    padding: vw(24);
    position: relative;
    margin-top: vw(55);
    border-radius: 0 0 vw(35) vw(35);
    .text {
      background: url('../assets/textBack.png') no-repeat;
      width: 100%;
      height: vw(94);
      background-size: cover;
      color: #7d0207;
      font-size: vw(36);
      text-align: center;
      line-height: vw(94);
      // margin-top: vw(152);
      // margin-bottom: vw(45);
      margin: vw(35) 0;
      font-weight: bold;
    }
    .text0 {
      margin-top: vw(152);
    }

    .content {
      font-size: vw(28);
      font-weight: bold;
      color: #ffff;
      line-height: vw(63);
      white-space: pre-wrap;
    }

    .content-photos {
      display: flex;
      flex-wrap: wrap;
      //   justify-content: space-between;

      img {
        width: vw(188);
        height: vw(188);
        margin-bottom: 15px;
        margin-right: 15px;
        background-color: rgba(255, 255, 255, 0.1);
      }
    }
  }

  .footerShare {
    display: flex;
    // align-items: center;
    justify-content: center;
    margin-top: vw(100);

    .right-text {
      margin-left: vw(12.5);
      display: flex;
      flex-direction: column;
      justify-content: space-between;

      div {
        color: #ffffff;
        font-size: vw(24);
        font-weight: bold;
      }
    }
  }
  .html2canvasBox {
    width: 100%;
    height: 100%;
    min-height: 100vh;
    overflow: hidden !important;
    display: flex;
    flex-direction: column;
    .closeShare {
      position: absolute;
      z-index: 1;
      right: 10px;
      top: 10px;
      color: #fff;
      .van-icon {
        font-size: 20px;
      }
    }
  }
  #html2canvas {
    width: 100%;
    height: 100%;
    position: static; /* 改为静态定位 */

    .scroll-container {
      width: 100%;
      height: 100%;
      flex: 1;
      overflow-y: auto !important;
      -webkit-overflow-scrolling: touch;
      overscroll-behavior: contain;
      touch-action: pan-y;
      // padding: 20px 0;
      box-sizing: border-box;
      /* 修复iOS弹性滚动 */
      overflow-scrolling: touch;
      max-height: 100vh; /* 添加最大高度限制 */
      position: relative; /* 修复定位上下文 */
      img {
        width: 100%;
        display: block;
      }
    }
  }
}
</style>
<style lang="scss">
.share {
  .QRcodes {
    width: vw(87);
    height: vw(87);
    margin-right: vw(12.5);
    position: relative;
    .logo {
      position: absolute;
      top: vw(43);
      left: vw(43);
      margin: vw(-15) 0 0 vw(-15);
      z-index: 3;
      img {
        width: vw(30);
        height: vw(30);
      }
    }

    img {
      width: 100%;
      height: 100%;
    }
  }
}
</style>