使用vue的图片裁剪vue-cropper全步骤

   

 参考文档：vue-cropper官网

0个报错  简单易懂的vue-cropper文章来啦

 

今天就来讲讲图片剪辑vue-cropper这个组件，本篇文章将一五一十的列出全步骤

好啦我们废话不多说。安装一下依赖 $  npm install vue-cropper 或者 yarn add vue-cropper 

直接上代码吧

我们这里需要两个文件夹

 我们把cropper成品组件代码先放到CropperDemo.vue中：

<template>
  <div class="cropper-content">
    <div class="cropper-box">
      <div class="cropper">
        <VueCropper
            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">
        </VueCropper>
      </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" class="btn" type="danger" plain icon="el-icon-zoom-in" @click="changeScale(1)">放大</el-button>
          <el-button size="mini" class="btn" type="danger" plain icon="el-icon-zoom-out" @click="changeScale(-1)">缩小</el-button>
          <el-button size="mini" class="btn" type="danger" plain @click="rotateLeft">? 左旋转</el-button>
          <el-button size="mini" class="btn" type="danger" plain @click="rotateRight">? 右旋转</el-button>
        </div>
        <div class="upload-btn">
          <el-button size="mini" class="file_load" type="success" @click="uploadImg('blob')"><Icon type="ios-cloud-upload" />上传封面 </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: "Name",
  components: {
    VueCropper
  },
  props:[
      'imageFile'
  ],
  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, 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.$refs.cropper.rotateRight()
    },
    //实时预览函数
    realTime (data) {
      this.previews = data
      //预览图永远和图片原始尺寸相等
      this.previews.img.maxWait = data.img.width
    },
    //选择图片
    selectImg (e) {
      let file = e.target.files[0]
      if (!/.(jpg|jpeg|png|JPG|PNG)$/.test(e.target.value)) {
        this.$message({
          message: '图片类型要求：jpeg、jpg、png',
          type: "error"
        });
        return false
      }
      //转化为blob
      let reader = new FileReader()
      reader.onload = (e) => {
        let data
        if (typeof e.target.result === 'object') {
          data = window.URL.createObjectURL(new Blob([e.target.result]))
        } else {
          data = e.target.result
        }
        this.option.img = data
      }
      //转化为base64
      reader.readAsDataURL(file)
    },
    //上传图片
    uploadImg (type) {
      let _this = this;
      if (type === 'blob') {
        console.log(this.$refs)
        //获取截图的blob数据
        this.$refs.cropper.getCropBlob(async (data) => {
          let formData = new FormData();
          formData.append('imageFile',data,"DX.jpg")
          //调用axios上传 
          let {data: res} = await _this.$http.post(this.road+'upload_image?appid='+this.paramce.appid+'&appsecret='+this.paramce.appsecret+'&token='+this.paramce.token, formData)
          if(res.code === '200'){
            _this.$Message.info({
              content:res.errorMessage,
              duration: 2,
            });
            let imgInfo = {
              name : _this.Name,
              url : res.result
            };
            _this.$emit('uploadImgSuccess',imgInfo); //子组件设置父组件的方法
          }else {
            _this.$Message.info({
              content:res.errorMessage,
              duration: 2,
            });
          }
        })
      }
    },
  },
}
</script>

<style scoped lang="scss">
.file_load{
  padding: 0px 10px;
  border-radius: 3px;
  background:rgb(51,153,255);
  color:#fff;
  border:none
}
.file_load i{
  color:#f4f4f4
}
.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: 5px;
  }
}
</style>

我们再建造Cropper.vue来使用CropperDemo.vue这个组件:

<template>
  <div>
     <cropper-image
         :Name="cropperName"
         @uploadImgSuccess = "handleUploadSuccess"
         ref="child">
     </cropper-image>
  </div>
</template>

<script>
import CropperImage from "@/index/CropperDemo.vue";
export default {
  name: "Tailoring",
  components: {
    CropperImage
  },
  data () {
    return {
      ruleValidate: {
        mainImage: [
          {required: true, message: '请上传封面', trigger: 'blur'}
        ],
      },
      //裁切图片参数
      cropperName:'',
      imgName: '',
      imgVisible: false
    }
  },
  methods: {
    //图片上传成功后
    handleUploadSuccess (data){
      console.log(data)
    }
  }
}
</script>

最后我们可能会报错的哈

报错原因：说明项目中没有 sass-loader依赖，由于sass-loader需要node-sass组件,所以我们需要安装的是两个组件：

1. sass-loader: npm install sass-loader -D

2. sass-node:  npm install node-sass -D