vue实现移动端图片裁剪上传功能

本文实例为大家分享了vue移动端图片裁剪上传的具体代码，供大家参考，具体内容如下

1. 安装cropperjs依赖库

npm install cropperjs

2. 编写组件simplecropper.vue

<template> 
 <div class="v-simple-cropper"> 
 <slot> 
  <button @click="upload">上传图片</button> 
 </slot> 
 <input class="file" ref="file" type="file" accept="image/*" @change="uploadchange"> 
 <div class="v-cropper-layer" ref="layer"> 
  <div class="layer-header"> 
  <button class="cancel" @click="cancelhandle">取消</button> 
  <button class="confirm" @click="confirmhandle">裁剪</button> 
  </div> 
  <img ref="cropperimg"> 
 </div> 
 </div> 
</template> 
 
<script> 
import cropper from 'cropperjs' 
import 'cropperjs/dist/cropper.min.css' 
export default { 
 name: 'v-simple-cropper', 
 props: { 
 initparam: object, 
 successcallback: { 
  type: function, 
  default: () => {} 
 } 
 }, 
 data () { 
 return { 
  cropper: {}, 
  filename: '' 
 } 
 }, 
 mounted () { 
 this.init() 
 }, 
 methods: { 
 // 初始化裁剪插件 
 init () { 
  let cropperimg = this.$refs['cropperimg'] 
  this.cropper = new cropper(cropperimg, { 
  aspectratio: 1 / 1, 
  dragmode: 'move' 
  }) 
 }, 
 // 点击上传按钮 
 upload () { 
  this.$refs['file'].click() 
 }, 
 // 选择上传文件 
 uploadchange (e) { 
  let file = e.target.files[0] 
  this.filename = file['name'] 
  let url = window.url || window.webkiturl 
  this.$refs['layer'].style.display = 'block' 
  this.cropper.replace(url.createobjecturl(file)) 
 }, 
 // 取消上传 
 cancelhandle () { 
  this.cropper.reset() 
  this.$refs['layer'].style.display = 'none' 
  this.$refs['file'].value = '' 
 }, 
 // 确定上传 
 confirmhandle () { 
  let cropbox = this.cropper.getcropboxdata() 
  let scale = this.initparam['scale'] || 1 
  let cropcanvas = this.cropper.getcroppedcanvas({ 
  width: cropbox.width * scale, 
  height: cropbox.height * scale 
  }) 
  let imgdata = cropcanvas.todataurl('image/jpeg') 
  let formdata = new window.formdata() 
  formdata.append('filetype', this.initparam['filetype']) 
  formdata.append('img', imgdata) 
  formdata.append('signid', this.$localstorage('signid')) 
  formdata.append('originalfilename', this.filename) 
  window.$axios(this.initparam['uploadurl'], formdata, { 
  method: 'post', 
  headers: {'content-type': 'multipart/form-data'} 
  }).then(res => { 
  this.successcallback(res.data) 
  this.cancelhandle() 
  }) 
 } 
 } 
} 
</script> 
 
<style lang="less"> 
.v-simple-cropper { 
 .file { 
 display: none; 
 } 
 .v-cropper-layer { 
 position: fixed; 
 top: 0; 
 bottom: 0; 
 left: 0; 
 right: 0; 
 background: #fff; 
 z-index: 99999; 
 display: none; 
 .layer-header { 
  position: absolute; 
  top: 0; 
  left: 0; 
  z-index: 99999; 
  background: #fff; 
  width: 100%; 
  height: .8rem; 
  padding: 0 .2rem; 
  box-sizing: border-box; 
 } 
 .cancel, 
 .confirm { 
  line-height: .8rem; 
  font-size: .28rem; 
  background: inherit; 
  border: 0; 
  outline: 0; 
  float: left; 
 } 
 .confirm { 
  float: right; 
 } 
 img { 
  position: inherit!important; 
  border-radius: inherit!important; 
  float: inherit!important; 
 } 
 } 
} 
</style> 

3. 引用组件

<template> 
 <simple-cropper :initparam="uploadparam" :successcallback="uploadhandle" ref="cropper"> 
 <img :src="userimg" @click="upload"> 
 </simple-cropper> 
</template> 
 
<script> 
import simplecropper from '@/components/simplecropper' 
export default { 
 name: 'info', 
 data () { 
 return { 
  uploadparam: { 
  filetype: 'recruit', // 其他上传参数 
  uploadurl: this.$dataurl + 'uploadaction/qcloudimg', // 上传地址 
  scale: 4 // 相对手机屏幕放大的倍数: 4倍 
  }, 
  userimg: this.$dataurl + 'test.png' 
 } 
 }, 
 methods: { 
 // 上传头像 
 upload () { 
  this.$refs['cropper'].upload() 
 }, 
 // 上传头像成功回调 
 uploadhandle (data) { 
  if (data.state === 'success') { 
  this.userimg = this.form.headimgurl = data.fileid 
  } 
 } 
 }, 
 components: { 
 simplecropper 
 } 
} 
</script> 

4. 示例图

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。