Angularjs 文件未传递到角JS中的ng文件选择

我试图将一个文件从html视图传递到angular controller，为此我在视图中使用ng file select。我的视图代码如下所示：

<div ng-controller="fileController">

    <input type="file" ng-model="fibQuestion.fibContentLanguage.colUploadPaperUrl" name="PaperDocUrl" ng-file-select="onPaperFileSelect($files)" onclick="this.value = null" id="forPracticalTestPaper" />

    <div>
        <input type="button" id="save" class="btn btn-success" value="Save" ng-click="PaperFileProcessing()" />
    </div>
</div>

---

当我按下save按钮时，会调用函数PaperFileProcessing（），但是，var fileBank=$scope.uploadedPaper；显示未定义。

我认为您的代码缺少某种“承诺”，无法等待文件完全上传，不是吗？ 也许是这样的：

// returns a promise
upload.then(function(resp) {
  // file is uploaded successfully
  console.log('file ' + resp.config.data.file.name + 'is uploaded successfully. Response: ' + resp.data);
}, function(resp) {
  // handle error
}, function(evt) {
  // progress notify
  console.log('progress: ' + parseInt(100.0 * evt.loaded / evt.total) + '% file :'+ evt.config.data.file.name);
});

// returns a promise
upload.then(function(resp) {
  // file is uploaded successfully
  console.log('file ' + resp.config.data.file.name + 'is uploaded successfully. Response: ' + resp.data);
}, function(resp) {
  // handle error
}, function(evt) {
  // progress notify
  console.log('progress: ' + parseInt(100.0 * evt.loaded / evt.total) + '% file :'+ evt.config.data.file.name);
});