头像上传和图片裁剪功能(cropper.js)_移动端js上传头像调整位置

<template>
 
  <div class="user-profile">
 
    <input type="file" name="" id="" ref="file" hidden @change="onFileChange" />
 
    <!-- 个人信息 -->
 
    <van-cell title="头像" is-link @click="$refs.file.click()">
 
      <van-image class="avatar" fit="cover" round :src="user.photo" />
 
    </van-cell>
 
     //此为组件
 
    <!-- 修改头像 -->
 
    <van-popup
 
      style="height: 100%"
 
      position="bottom"
 
      v-model="isUpdatePhotoShow"
 
    >
 
      <updatePhoto
 
      :img="img"
 
      @close="isUpdatePhotoShow = false"
 
      v-if="isUpdatePhotoShow"
 
      @updatePhoto="user.photo = $event"
 
      />
 
    </van-popup>
 
    <!-- 修改头像 -->
 
  </div>
 
</template>
 
export default {
  data() {
    return {
      user: {}, //用户的个人资料
      isUpdatePhotoShow: false, //头像弹出层
      img: null,
    };
  },
  created() {
    this.loadProfile();
  },
  components: {
    updatePhoto,
  },
  methods: {
    //调取接口,获取user数据
    async loadProfile() {
      try {
        const { data } = await getProfileList();
        this.user = data.data;
      } catch (err) {
        this.$toast("数据加载失败,请稍后重试");
      }
    },
    onFileChange() {
      // 获取文件对象
      const file = this.$refs.file.files[0];
      // console.log(file);
      // 基于文章对象获取blob数据
      let binaryData = [];
      binaryData.push(file);
      const data = window.URL.createObjectURL(
        new File(binaryData, { type: "application/pdf;chartset=UTF-8" })
      );
      this.img = data;
      //解决bug,解决选择的头像是同一张,然后不弹出弹层的问题
      //把每次选择的默认值清空
      this.$refs.file.value = "";
      //图片选择好了之后,弹出弹层
      this.isUpdatePhotoShow = true;
    },
  },
};
 
 
 

以下为图片裁剪组件(图片裁剪主要是要使用cropper.js这个插件,然后配置一下)

<template>
  <div class="updatePhoto">
    <img :src="img" alt="" class="img" ref="img" />
    <div class="toolbar">
      <div class="cancel" @click="$emit('close')">取消</div>
      <div class="confirm" @click="onConfirm">完成</div>
    </div>
  </div>
</template>
 
<script>
import "cropperjs/dist/cropper.css";
import Cropper from "cropperjs";
import { updateUserPhoto } from '@/api/login.js'
export default {
  props: {
    img: {
      type: [String, Object],
      require: true,
    },
  },
  data(){
    return {
      cropper:null,
    }
  },
  mounted() {
    const image = this.$refs.img;
    this.cropper = new Cropper(image, {
      // 配置裁剪参数
      viewMode: 1,
      dragMode: "move",
      aspectRatio: 1,
      autoCropArea: 1,
      cropBoxMovable: false,
      cropBoxResizable: false,
      background: false,
    });
  },
  methods:{
    onConfirm(){
      // 基于服务端的裁切使用getData方法获取裁切参数
      // console.log(this.cropper.getData())
      // 纯客户端的裁切使用getCroppedCanvas获取裁切文件对象
      this.cropper.getCroppedCanvas().toBlob(blob => {
        this.updatePhoto(blob)
      })
    },
    async updatePhoto(blob){
      // 接口要求必须传formData格式
      const formData = new FormData()
      formData.append('photo',blob)
      try{
        const { data } = await updateUserPhoto(formData)
        this.$emit('close') //关闭弹窗
        this.$emit('updatePhoto',data.data.photo)//更新图片
        this.$toast.success('更新成功')
      }catch(err){
        this.$toast.fail('更新失败')
      }
    }
  }
};
</script>
 
<style scoped lang="less">
.updatePhoto {
  height: 100%;
  // display: flex;
  // justify-content: center;
  // align-items: center;
  background-color: #000;
  .img {
    max-width: 100%;
    display: block;
  }
  .toolbar {
    // border: 1px solid blue;
    position: fixed;
    bottom: 0px;
    left: 0px;
    right: 0px;
    display: flex;
    justify-content: space-between;
    .cancel,
    .confirm {
      width: 90px;
      height: 90px;
      font-size: 40px;
      display: flex;
      justify-content: center;
      align-items: center;
      color: #fff;
    }
  }
}
</style>