<div>
//要显示的图片
  <div class="imgBox name">
      <img :src="imgSrc" />
  </div>
  <van-action-sheet v-model="show1">
   <ul>
    <li class="paizhao" @click="captureImage()">拍照</li>
    <li class="paizhao" @click="galleryImg()">从相册选择</li>
    <li class="paizhao" @click="quxiao()">取消</li>
   </ul>
  </van-action-sheet> 
</div>

//data里声明的变量
data（）{
return{
 imgSrc: "", //展示的图片路径
      tupianlist: "", //展示的图片容器
 }
}

methods：{
     // 从相册中选取图片
    galleryImg() {
      let This = this;
      console.log("从相册中选择图片:");
      plus.gallery.pick(function(path) {
        This.imgSrc = path; //path 是本地路径
        let img = new Image();
        img.src = path;
        img.onload = function(path) {
          var that = img;
          var w = that.width, //320
            h = that.height, //426
            scale = w / h;
          w = 320 || w;
          h = w / scale;
          var canvas = document.createElement("canvas");
          canvas.width = 300; //这个设置不能丢，否者会成为canvas默认的300*150的大小
          canvas.height = 300; //这个设置不能丢，否者会成为canvas默认的300*150的大小
          var ctx = canvas.getContext("2d");
          ctx.drawImage(that, 0, 0, 300, 300);
          var base64 = canvas.toDataURL(
            "image/png",
            "image/jpeg",
            "image/jpg",
            1 || 0.8
          );     
          This.tupianlist = base64;
          // console.log(This.tupianlist + "我是转码后的base");
 
  //这里可以请求接口
        };
      });
    },
    // 拍照
    captureImage() {
      let This = this;
      var cmr = plus.camera.getCamera(); //获取摄像头管理对象
      var res = cmr.supportedImageResolutions[0]; //字符串数组，摄像头支持的拍照分辨率
      var fmt = cmr.supportedImageFormats[0]; //字符串数组，摄像头支持的拍照文件格式
      // console.log("拍照分辨率: " + res + ", 拍照文件格式: " + fmt);
      cmr.captureImage(
        function(path) {
          plus.gallery.save(path, params => {
            let file = params.file;
            //编码为base64
            var img = new Image();
            img.src = file;
            img.onload = function() {
              var that = img;
              var w = that.width,
                h = that.height,
                scale = w / h;
              w = 320 || w;
              h = w / scale;
              var canvas = document.createElement("canvas");
              canvas.width = 300; //这个设置不能丢，否者会成为canvas默认的300*150的大小
              canvas.height = 300; //这个设置不能丢，否者会成为canvas默认的300*150的大小
              var ctx = canvas.getContext("2d");
              ctx.drawImage(that, 0, 0, 300, 300);
              var base64 = canvas.toDataURL(
                "image/png",
                "image/jpeg",
                "image/jpg",
                1 || 0.8
              );
              // console.log(base64);
              This.tupianlist = base64;
  //这里可以请求接口
            };
          });
          //进行拍照操作
          // 通过URL参数获取目录对象或文件对象
          plus.io.resolveLocalFileSystemURL(path, function(entry) {
            var tmpPath = entry.toLocalURL(); //获取目录路径转换为本地路径URL地址
            This.imgSrc = tmpPath;
            // alert("拍摄成功: " + tmpPath);
          });
        },
        function(error) {
          //捕获图像失败回调
          // alert("捕获图像失败: " + error.message);
        },
        { resolution: res, format: fmt }
      );
      this.show1 = false;
    },
}