使用 “vue-cropper“ 进行图片裁剪

<template>
  <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)">
          <el-button size="mini" type="danger" plain icon="el-icon-zoom-in" @click="changeScale(1)">放大</el-button>
          <el-button size="mini" type="danger" plain icon="el-icon-zoom-out" @click="changeScale(-1)">缩小</el-button>
          <el-button size="mini" type="danger" plain @click="rotateLeft">↺ 左旋转</el-button>
          <el-button size="mini" type="danger" plain @click="rotateRight">↻ 右旋转</el-button>
        </div>
        <div class="upload-btn">
          <el-button size="mini" type="success" @click="uploadImg('blob')">上传封面 <i class="el-icon-upload"></i></el-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>
</template>
<script>
import { VueCropper } from 'vue-cropper'
export default {
  name: "CropperImage",
  components: {
    VueCropper
  },
  props:['Name'],
  data() {
    return {
      name:this.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: true,      //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: {
    //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 scoped lang="scss">
.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: .1s;
    transition: .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>

<template>
  <div class="cropper-app">
    <el-form :model="formValidate" :rules="ruleValidate" ref="formValidate" label-width="100px" class="demo-ruleForm">
      <el-form-item label="封面上传" prop="mainImage">
        <div class="list-img-box">
          <div v-if="formValidate.mainImage !== ''">
            <img :src="formValidate.mainImage" style='width:300px;height:150px' alt="自定义封面">
          </div>
          <div v-else class="upload-btn" style="height: 120px;" @click="uploadPicture('flagImg')">
            <i class="el-icon-plus" style="font-size: 30px;"></i>
            <span>封面设置</span>
          </div>
        </div>
        <input type="hidden" v-model="formValidate.mainImage" placeholder="请添加封面">
      </el-form-item>
    </el-form>
    <!-- 剪裁组件弹窗 -->
    <el-dialog
        title="裁切封面"
        :visible.sync="cropperModel"
        width="950px"
        center
       >
     <cropper-image
         :Name="cropperName"
         @uploadImgSuccess = "handleUploadSuccess"
         ref="child">
     </cropper-image>
    </el-dialog>
    <!--查看大封面-->
    <el-dialog
        title="查看大封面"
        :visible.sync="imgVisible"
        center>
      <img :src="imgName" v-if="imgVisible" style="width: 100%" alt="查看">
    </el-dialog>
  </div>
</template>
<script>
import CropperImage from "@/views/resmanage/CropperImage";
export default {
  name: "Tailoring",
  components: {CropperImage},
  data () {
    return {
      formValidate: {
        mainImage: '',
      },
      ruleValidate: {
        mainImage: [
          {required: true, message: '请上传封面', trigger: 'blur'}
        ],
      },
      //裁切图片参数
      cropperModel:false,
      cropperName:'',
      imgName: '',
      imgVisible: false
    }
  },
  methods: {
    //封面设置
    uploadPicture(name){
      this.cropperName = name;
      this.cropperModel = true;
    },
    //图片上传成功后
    handleUploadSuccess (data){
      console.log(data)
      switch(data.name){
        case 'flagImg':
          this.formValidate.mainImage = 'http://ydfblog.cn/dfs/'+data.url;
          console.log('最终输出'+data.name)
          break;
      }
      this.cropperModel = false;
    }
  }
}
</script>
<style scoped>
  .upload-list-cover{
      position: absolute;
      top: 0;
      bottom: 0;
      left: 0;
      right: 0;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      padding: 0 40px;
      align-items: center;
      background: rgba(0,0,0,.6);
      opacity: 0;
      transition: opacity 1s;
  }
  .cover_icon {
    font-size: 30px;
  }
  .upload-btn{
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    border: 1px solid #cccccc;
    border-radius: 5px;
    overflow: hidden;
    box-shadow: 0 0 1px #cccccc;
  }
  .upload-btn:hover {
    border: 1px solid #69b7ed;
  }
  .upload-btn i{
    margin: 5px;
  }
</style>

<template>
  <div class="updateAvatar1">
    <el-button type="primary" @click="visible = true">修改头像</el-button>
    <el-dialog
      title="修改头像"
      :visible.sync="visible"
      width="800"
      :before-close="handleClose">
      <el-row>
        <el-col :span="12" style="height: 300px;">
          <vue-cropper
            ref="cropper"
            :img="options.img"
            :info="true"
            :autoCrop="options.autoCrop"
            :autoCropWidth="options.autoCropWidth"
            :autoCropHeight="options.autoCropHeight"
            :fixedBox="options.fixedBox"
            @realTime="realTime"
          >
          </vue-cropper>
          <div class="btnS">
            <el-upload
              ref="uploadCropper"
              :before-upload="beforeAvatarUpload"
              :show-file-list="false"
              action="/"
              style="margin-right: 10px;"
            >
              <el-button type="primary" size="small">上传头像</el-button>
            </el-upload>
            <el-tooltip class="item" effect="dark" content="向左旋转" placement="top">
              <el-button size="small" @click="rotateLeft"><i class="el-icon-refresh-left"></i></el-button>
            </el-tooltip>
            <el-tooltip class="item" effect="dark" content="向右旋转" placement="top">
              <el-button size="small" @click="rotateRight"><i class="el-icon-refresh-right"></i></el-button>
            </el-tooltip>
            <el-tooltip class="item" effect="dark" content="放大" placement="top">
              <el-button size="small" @click="changeScale(1)"><i class="el-icon-plus"></i></el-button>
            </el-tooltip>
            <el-tooltip class="item" effect="dark" content="缩小" placement="top">
              <el-button size="small" @click="changeScale(-1)"><i class="el-icon-minus"></i></el-button>
            </el-tooltip>
          </div>
        </el-col>
        <el-col :span="12" style="height: 300px;">
          <div class="upload-preview">
            <img :src="previews.url" :style="previews.img" v-show="previews.url"/>
          </div>
        </el-col>
      </el-row>
      <span slot="footer" class="dialog-footer">
        <el-button @click="visible = false" size="small">取 消</el-button>
        <el-button type="primary" :loading="loading" @click="submitUpdate" size="small">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
  import { VueCropper } from 'vue-cropper'
  export default {
    name: 'updateAvatar1',
    components: {
      VueCropper
    },
    methods: {
      // 实时预览函数
      realTime(data) {
        this.previews = data
      },
      handleClose() {},
      beforeAvatarUpload(file) {
        // 此处的上传file有多种处理方式
        console.log(file)
        let type = file.type.split('/')[1];
        if (this.uploadAccept.indexOf(type) > -1) {
          // 上传允许的类型之内
          const reader = new FileReader()
          // 把Array Buffer转化为blob 如果是base64不需要
          // 转化为base64
          reader.readAsDataURL(file)
          reader.onload = () => {
            this.options.img = reader.result
          }
        } else {
          this.$message.warning("您上传的图片格式不符，请重新上传")
        }
      },
      changeScale (num) {
        this.$refs.cropper.changeScale(num)
      },
      rotateLeft () {
        this.$refs.cropper.rotateLeft()
      },
      rotateRight () {
        this.$refs.cropper.rotateRight()
      },
      submitUpdate() {
        this.loading = true
        this.$refs.cropper.getCropData((base64) => {
          this.uploadImg(base64);
        });
      },
      uploadImg() {
        // 发送ajax请求
      }
    },
    data() {
      return {
        visible: true,
        options: {
          img: '', //裁剪图片的地址
          info: true, //裁剪框的大小信息
          outputSize: 0.8, // 裁剪生成图片的质量
          outputType: '', // 裁剪生成图片的格式
          canScale: false, // 图片是否允许滚轮缩放
          autoCrop: true, //是否默认生成截图框
          autoCropWidth: 200, //默认生成截图框宽度
          autoCropHeight: 200,
          fixedBox: true, // 固定截图框大小 是否允许改变
          fixed: true, //是否开启截图框宽高固定比例
          fixedNumber: [1, 1], //截图框的宽高比例
          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
          infoTrue: true // true 为展示真实输出图片宽高 false 展示看到的截图框宽高
        },
        previews: {},
        loading: false,
        fileList: [],
        uploadAccept: ['jpeg', 'jpg', 'png']
      }
    }
  }
</script>
<style lang="scss" scoped>
/deep/{
  .el-dialog{
    width: 840px;
  }
  .el-dialog__body{
    width: 800px;
  }
  .el-dialog__header{
    border-bottom: 1px solid #eaeaea;
  }
}
.btnS{
  display: flex;
  padding-top: 20px;
  .i{
    position: relative;
    font-size: 12px;
  }
}
.upload-preview {
  -webkit-box-sizing: content-box;
  -moz-box-sizing: content-box;
  box-sizing: content-box;
  position: absolute;
  top: 50%;
  transform: translate(50%, -50%);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  box-shadow: 0 0 4px #eaeaea;
  overflow: hidden;
  img {
    width: 100%;
    height: 100%;
  }
}
</style>