安装

npm install vue-cropper --save

使用

main.js里面

import VueCropper from 'vue-cropper'
Vue.use(VueCropper)

或者组件里

<script>
  import { VueCropper } from "vue-cropper";
  export default {
    name: "CropperImage",
    components: {
      VueCropper,
    }
  };
</script>

示例代码

<template>
  <Modal
    v-model="isOpen"
    class-name="cropper-image-modal"
    @on-visible-change="handleVisibleChange"
    width="50%"
  >
    <div slot="header" class="header">
      <h2>
        <span><Icon type="md-cut" size="12"/></span> <span>图片裁剪</span>
      </h2>
    </div>
    <div class="cropper-content">
      <div class="cropper-box">
        <div class="cropper">
          <vue-cropper
            ref="cropper"
            :img="option.img"
            :outputSize="option.outputSize"
            :outputType="option.outputType"
            :info="option.info"
            :canScale="option.canScale"
            :autoCrop="option.autoCrop"
            :autoCropWidth="option.autoCropWidth"
            :autoCropHeight="option.autoCropHeight"
            :fixed="option.fixed"
            :fixedNumber="option.fixedNumber"
            :full="option.full"
            :fixedBox="option.fixedBox"
            :canMove="option.canMove"
            :canMoveBox="option.canMoveBox"
            :original="option.original"
            :centerBox="option.centerBox"
            :height="option.height"
            :infoTrue="option.infoTrue"
            :maxImgSize="option.maxImgSize"
            :enlarge="option.enlarge"
            :mode="option.mode"
            @realTime="realTime"
            @imgLoad="imgLoad"
          >
          </vue-cropper>
        </div>
        <!--底部操作工具按钮-->
        <div class="footer-btn">
          <div class="scope-btn">
            <label class="btn" for="uploads">选择封面</label>
            <input
              type="file"
              id="uploads"
              style="position: absolute; clip: rect(0 0 0 0)"
              accept="image/png, image/jpeg, image/gif, image/jpg"
              @change="selectImg($event)"
            />
            <Button @click="changeScale(1)">放大</Button>
            <Button @click="changeScale(-1)">缩小</Button>
            <Button @click="rotateLeft">↺ 左旋转</Button>
            <Button @click="rotateRight">↻ 右旋转</Button>
          </div>
          <div class="upload-btn">
            <Button type="success" @click="uploadImg('blob')"
              >上传封面 <i class="el-icon-upload"></i
            ></Button>
          </div>
        </div>
      </div>
      <!--预览效果图-->
      <div class="show-preview">
        <div :style="previews.div" class="preview">
          <img :src="previews.url" :style="previews.img" />
        </div>
      </div>
    </div>
  </Modal>
</template>
<script>
import { VueCropper } from "vue-cropper";
export default {
  name: "CropperImage",
  components: {
    VueCropper,
  },
  //   props: ["Name"],
  data() {
    return {
      isOpen: true,
      name: "",
      previews: {},
      option: {
        img: "", //裁剪图片的地址
        outputSize: 1, //裁剪生成图片的质量(可选0.1 - 1)
        outputType: "jpeg", //裁剪生成图片的格式（jpeg || png || webp）
        info: true, //图片大小信息
        canScale: true, //图片是否允许滚轮缩放
        autoCrop: true, //是否默认生成截图框
        autoCropWidth: 230, //默认生成截图框宽度
        autoCropHeight: 150, //默认生成截图框高度
        fixed: true, //是否开启截图框宽高固定比例
        fixedNumber: [1.53, 1], //截图框的宽高比例
        full: false, //false按原比例裁切图片，不失真
        fixedBox: false, //固定截图框大小，不允许改变
        canMove: false, //上传图片是否可以移动
        canMoveBox: true, //截图框能否拖动
        original: false, //上传图片按照原始比例渲染
        centerBox: false, //截图框是否被限制在图片里面
        height: true, //是否按照设备的dpr 输出等比例图片
        infoTrue: false, //true为展示真实输出图片宽高，false展示看到的截图框宽高
        maxImgSize: 3000, //限制图片最大宽度和高度
        enlarge: 1, //图片根据截图框输出比例倍数
        mode: "230px 150px", //图片默认渲染方式
      },
    };
  },
  methods: {
    handleVisibleChange(value) {
      if (!value) {
        clearTimeout(this.time);
        this.time = setTimeout(() => {
          this.$parent.isAccountSet = false;
        }, 500);
      }
    },
    //初始化函数
    imgLoad(msg) {
      console.log("工具初始化函数=====" + msg);
    },
    //图片缩放
    changeScale(num) {
      num = num || 1;
      this.$refs.cropper.changeScale(num);
    },
    //向左旋转
    rotateLeft() {
      this.$refs.cropper.rotateLeft();
    },
    //向右旋转
    rotateRight() {
      this.$refs.cropper.rotateRight();
    },
    //实时预览函数
    realTime(data) {
      this.previews = data;
    },
    //选择图片
    selectImg(e) {
      let file = e.target.files[0];
      if (!/\.(jpg|jpeg|png|JPG|PNG)$/.test(e.target.value)) {
        this.$message({
          message: "图片类型要求：jpeg、jpg、png",
          type: "error",
        });
        return false;
      }
      //转化为blob
      let reader = new FileReader();
      reader.onload = (e) => {
        let data;
        if (typeof e.target.result === "object") {
          data = window.URL.createObjectURL(new Blob([e.target.result]));
        } else {
          data = e.target.result;
        }
        this.option.img = data;
      };
      //转化为base64
      reader.readAsDataURL(file);
    },
    //上传图片
    uploadImg(type) {
      let _this = this;
      if (type === "blob") {
        //获取截图的blob数据
        this.$refs.cropper.getCropBlob(async (data) => {
          let formData = new FormData();
          formData.append("file", data, "DX.jpg");
          //调用axios上传
          let { data: res } = await _this.$http.post("/api/file/imgUpload", formData);
          if (res.code === 200) {
            _this.$message({
              message: res.msg,
              type: "success",
            });
            let data = res.data.replace("[", "").replace("]", "").split(",");
            let imgInfo = {
              name: _this.Name,
              url: data[0],
            };
            _this.$emit("uploadImgSuccess", imgInfo);
          } else {
            _this.$message({
              message: "文件服务异常，请联系管理员！",
              type: "error",
            });
          }
        });
      }
    },
  },
};
</script>
<style lang="scss">
.cropper-image-modal {
  .cropper-content {
    display: flex;
    display: -webkit-flex;
    justify-content: flex-end;
    .cropper-box {
      flex: 1;
      width: 100%;
      .cropper {
        width: auto;
        height: 300px;
      }
    }
    .show-preview {
      flex: 1;
      -webkit-flex: 1;
      display: flex;
      display: -webkit-flex;
      justify-content: center;
      .preview {
        overflow: hidden;
        border: 1px solid #67c23a;
        background: #cccccc;
      }
    }
  }
  .footer-btn {
    margin-top: 30px;
    display: flex;
    display: -webkit-flex;
    justify-content: flex-end;
    .scope-btn {
      display: flex;
      display: -webkit-flex;
      justify-content: space-between;
      padding-right: 10px;
    }
    .upload-btn {
      flex: 1;
      -webkit-flex: 1;
      display: flex;
      display: -webkit-flex;
      justify-content: center;
    }
    .btn {
      outline: none;
      display: inline-block;
      line-height: 1;
      white-space: nowrap;
      cursor: pointer;
      -webkit-appearance: none;
      text-align: center;
      -webkit-box-sizing: border-box;
      box-sizing: border-box;
      outline: 0;
      -webkit-transition: 0.1s;
      transition: 0.1s;
      font-weight: 500;
      padding: 8px 15px;
      font-size: 12px;
      border-radius: 3px;
      color: #fff;
      background-color: #409eff;
      border-color: #409eff;
      margin-right: 10px;
    }
  }
}
</style>

示例图片