<template>
 <div>
  <input type="file" id="upload" accept="image" @change="upload" />
  <span>{{textData}}</span>
 </div>
</template>
<script>
export default {
 data() {
  return {
   picValue: {},
   headerImage: '',
   textData:''
  };
 },
 components: {},
 methods: {
  upload(e) {
   console.log(e);
   let files = e.target.files || e.dataTransfer.files;
   if (!files.length) return;
   this.picValue = files[0];
   this.imgPreview(this.picValue);
  },
  imgPreview(file) {
   let self = this;
   let Orientation;
   //去获取拍照时的信息，解决拍出来的照片旋转问题
   self.EXIF.getData(file, function() {
    Orientation = self.EXIF.getTag(this, 'Orientation');
   });
   // 看支持不支持FileReader
   if (!file || !window.FileReader) return;

   if (/^image/.test(file.type)) {
    // 创建一个reader
    let reader = new FileReader();
    // 将图片2将转成 base64 格式
    reader.readAsDataURL(file);
    // 读取成功后的回调
    reader.onloadend = function() {
     let result = this.result;
     let img = new Image();
     img.src = result;
     self.postImg(file);
    };
   }
  },
  postImg(val) {
   //这里写接口
   let self = this;
   // document.getElementById('upload')
   // this.EXIF.getData(val, function(r) {
   let r = this.EXIF.getAllTags(val);
   const allMetaData = r;
   let direction;
   if (allMetaData.GPSImgDirection) {
    const directionArry = allMetaData.GPSImgDirection; // 方位角
    direction = directionArry.numerator / directionArry.denominator;
   }
   let Longitude;
   if (allMetaData.GPSLongitude) {
    const LongitudeArry = allMetaData.GPSLongitude;
    const longLongitude =
     LongitudeArry[0].numerator / LongitudeArry[0].denominator +
     LongitudeArry[1].numerator / LongitudeArry[1].denominator / 60 +
     LongitudeArry[2].numerator / LongitudeArry[2].denominator / 3600;
    Longitude = longLongitude.toFixed(8);
   }
   let Latitude;
   if (allMetaData.GPSLatitude) {
    const LatitudeArry = allMetaData.GPSLatitude;
    const longLatitude =
     LatitudeArry[0].numerator / LatitudeArry[0].denominator +
     LatitudeArry[1].numerator / LatitudeArry[1].denominator / 60 +
     LatitudeArry[2].numerator / LatitudeArry[2].denominator / 3600;
    Latitude = longLatitude.toFixed(8);
   }
   self.textData = '我是Longitude' + Longitude + ' ====== '+"我是Latitude" + Latitude
   console.log('我进来了', direction, Longitude, Latitude);
   console.log('allMetaData', allMetaData);
   //接口 axios
   // });
  }
 }
};
</script>