如何修复：Cropper.js在选择新文件后不更改图像

Question

我有一个模态窗口，它首先显示现有图像并允许您对其进行裁剪。该模态窗口还具有一个按钮，用于“选择要裁剪的其他图像”。这将打开对话框窗口，以选择要裁剪的新图像。

一旦选择了新图像并且该对话框窗口关闭，模态窗口（您可以在其中裁剪图像）中的图像将不会更改为您刚刚选择的图像。

<label type="button" class="btn btn-primary" style="margin-bottom:0px;" for="input2-<cfoutput>#ProdPhotoID#</cfoutput>" title="Upload image file">
<input type="file" class="sr-only" id="input2-<cfoutput>#ProdPhotoID#</cfoutput>" name="image2-<cfoutput>#ProdPhotoID#</cfoutput>" accept=".jpg,.jpeg,.png,.gif,.bmp,.tiff">
      <span class="docs-tooltip" data-toggle="tooltip" data-animation="false" title="Replace this Image">
      <span class="fa fa-upload"></span> Upload and Crop a new Midsize Image
</span>
</label>


<!-- Modal -->
<div class="modal fade" id="midsizeImageModal-<cfoutput>#ProdPhotoID#</cfoutput>" tabindex="-1" role="dialog" aria-labelledby="midsizeImageModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="midsizeImageModalLabel">Midsize Image</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
         <img id="image2-<cfoutput>#ProdPhotoID#</cfoutput>" src="../../images/products/midsize/<cfoutput>#ProdPhotoMidsize#</cfoutput>">
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>

        <button type="button" class="btn btn-primary" id="close1_open2">Upload a Replacement</button>

        <label class="btn btn-primary btn-upload" for="input2-<cfoutput>#ProdPhotoID#</cfoutput>" title="Upload image file">
           <input type="file" class="sr-only"  id="" name="image2-<cfoutput>#ProdPhotoID#</cfoutput>" accept=".jpg,.jpeg,.png,.gif,.bmp,.tiff">
            <span class="docs-tooltip" data-toggle="tooltip" data-animation="false" title="Replace this Image">
              <span class="fa fa-upload">Upload and Crop a new Midsize Image</span>
            </span>
          </label>

      </div>
    </div>
  </div>
</div>





<script>
 window.addEventListener('DOMContentLoaded', function () {
      var midsize = document.getElementById('image2-<cfoutput>#ProdPhotoID#</cfoutput>');
      var image = document.getElementById('image2-<cfoutput>#ProdPhotoID#</cfoutput>');
      var input = document.getElementById('input2-<cfoutput>#ProdPhotoID#</cfoutput>');
      var $progress = $('.progress');
      var $progressBar = $('.progress-bar');
      var $alert = $('.alert');
      var $modal = $('#modal2-<cfoutput>#ProdPhotoID#</cfoutput>');
      var cropper;

      $('[data-toggle="tooltip"]').tooltip();

      input.addEventListener('change', function (e) {
        var files = e.target.files;
        var done = function (url) {
          input.value = '';
          image.src = url;
          $alert.hide();
          $modal.modal('show');
        };
        var reader;
        var file;
        var url;

        if (files && files.length > 0) {
          file = files[0];
            $("#midsizeImageModal-<cfoutput>#ProdPhotoID#</cfoutput>").modal('hide');  <!-- close 1st window if new image selected to crop-->
          if (URL) {
            done(URL.createObjectURL(file));
          } else if (FileReader) {
            reader = new FileReader();
            reader.onload = function (e) {
              done(reader.result);
            };
            reader.readAsDataURL(file);
          }
        }
      });

      $modal.on('shown.bs.modal', function () {
        cropper = new Cropper(image, {
          aspectRatio: 1,
          viewMode: 3,
        });
      }).on('hidden.bs.modal', function () {
        cropper.destroy();
        cropper = null;

      });

      document.getElementById('crop2-<cfoutput>#ProdPhotoID#</cfoutput>').addEventListener('click', function () {
        var initialmidsizeURL;
        var canvas;

        $modal.modal('hide');

        if (cropper) {
          canvas = cropper.getCroppedCanvas({
            width: 560,
            height: 460,
          });
          initialmidsizeURL = midsize.src;
          midsize.src = canvas.toDataURL();
          $progress.show();
          $alert.removeClass('alert-success alert-warning');
          canvas.toBlob(function (blob) {
            var formData = new FormData();

            formData.append('midsize', blob, 'midsize.jpg');
            formData.append('imageName', "<cfoutput>#imgname2#</cfoutput>");
            formData.append('prodID', "<cfoutput>#URL.prodid#</cfoutput>");
            formData.append('photoID', "<cfoutput>#ProdPhotoID#</cfoutput>"); 

            $.ajax('inc/_image_midsize_ajax.cfm', {
              method: 'POST',
              data: formData,      
              processData: false,
              contentType: false,

              xhr: function () {
                var xhr = new XMLHttpRequest();

                xhr.upload.onprogress = function (e) {
                  var percent = '0';
                  var percentage = '0%';

                  if (e.lengthComputable) {
                    percent = Math.round((e.loaded / e.total) * 100);
                    percentage = percent + '%';
                    $progressBar.width(percentage).attr('aria-valuenow', percent).text(percentage);
                  }
                };

                return xhr;
              },

              success: function () {
                $alert.show().addClass('alert-success').text('Upload success');
              },

              error: function () {
                midsize.src = initialmidsizeURL;
                $alert.show().addClass('alert-warning').text('Upload error');
              },

              complete: function () {
                $progress.hide();
              },





            });
          });
        }
      });
    });
</script>

我试图在模式窗口中获取按钮（选择要裁剪的图像），以在选择后更改要裁剪的图像。现在，它仍然显示原始图像。

Answer 1

通过更改以下内容解决了此问题...

从： var midsize = document.getElementById（'image2-＃ProdPhotoID＃'）;

至： var midsize = document.getElementById（'avatar2-＃ProdPhotoID＃'）;

并通过更改输入ID。

从： id =“ image2-＃ProdPhotoID＃

收件人： id =“ avatar2-＃ProdPhotoID＃