有问题

<view class="file-picker__box jsz" @tap="jszxszUpload('jsz')"></view>

.jsz {
  background-image: url('../../static/example_drive.png');
}

解决1

<view class="file-picker__box jsz" :style="{ 'background-image': 'url('+example_drive+')' }" @tap="jszxszUpload('jsz')"></view>

data(){
  return {
    example_drive: '../../static/example_drive.png'
  }
}

解决2

<view class="file-picker__box jsz" @tap="jszxszUpload('jsz')"></view>

.jsz {
  background-image: url('使用base64格式');
}