ng2-fileupload无法将进度从0提升到100％

Question

这是我的ts文件代码：我正在使用angular7 with "ng2-file-upload": "^1.3.0",

constructor(private store:Store<StateSetupConfig>,
        private changeDetector: ChangeDetectorRef) {

        this.fileUploader = new FileUploader(
                            {
                                allowedFileType:this.allowedFileType,
                                maxFileSize: this.singleMaxFileSize,
                                queueLimit : this.queueLimit,
                                removeAfterUpload: true,
                                autoUpload: true,
                            });


        this.fileUploader.onWhenAddingFileFailed = (item, filter, options) => this.onWhenAddingFileFailed(item, filter, options);    

        this.fileUploader.onProgressItem = (progress:any) => this.changeDetector.detectChanges();
        this.fileUploader.onProgressItem = (fileItem:FileItem, progress:any) => {
            console.log('progress', progress); only getting 0
        }
    }

当我仅上传文件时，我的进度为0。没有更新，我的进度为上传。有人可以帮助我了解我的代码存在的问题吗？

谢谢。