javascript - Angular $scope 与文件输入类型冲突

Question

我试图使用 angularjs 将文件转换为字节数组。它工作正常，还将字节代码和文件名添加到数组($scope.FileAttachments)中，当将其添加到 $scope.FileAttachments 时，客户端 ng-repet 将显示附加文件。文件转换完成，文件添加到 $scope.FileAttachments 也完成，但 ng-repeat 无法在正确的时间工作。有趣的问题是，当 View 内发生任何其他事件时，ng-repeat 可以很好地工作。

HTML 代码

<input id="File1" ng-model="File1" onchange="angular.element(this).scope().file1Upload()" type="file" />

<table  class="table table-striped table-bordered table-list">
    <thead>
        <tr>
             <th>Name</th>
        </tr>
    </thead>
    <tbody id="tblAttachments">
         <tr ng-repeat="item in FileAttachments  track by $index">
             <td>{{item.AttachmentDescription}}</td>
          </tr>
    </tbody>
</table>

AngularJS Controller 代码

$scope.FileAttachments = [];
var fileData;

function getBuffer(resolve) {
     var reader = new FileReader();
     reader.readAsArrayBuffer(fileData);
     reader.onload = function () {
          var arrayBuffer = reader.result
          var bytes = new Uint8Array(arrayBuffer);
          resolve(bytes);
     }
}


$scope.file1Upload=function() {
     var files = document.getElementById("File1").files;
     fileData = new Blob([files[0]]);
     var promise = new Promise(getBuffer);
     promise.then(function (data) {
          $scope.FileAttachments.push({
              "AttachmentDescription": files[0].name.toString(),
              "FileValue": data.toString()
          });
     }).catch(function (err) {
          console.log('Error: ', err);
     });
}

Answer 1

是的，明白了，在 Controller 范围之外时需要使用 $scope.$apply() 。

$scope.file1Upload=function() {
      var files = document.getElementById("File1").files;
      fileData = new Blob([files[0]]);
      var promise = new Promise(getBuffer);
      promise.then(function (data) {
          $scope.$apply(function () {
              $scope.FileAttachments.push({
                   "AttachmentDescription": files[0].name.toString()
                   "FileValue": data.toString()
               });
          });
      }).catch(function (err) {
           console.log('Error: ', err);
      });
 }