由danialfarid提供的角度服务和ng-file-upload

Question

我在函数内部声明了一个变量，并在变量函数内的另一个函数内再次修改它。为什么返回变量上传的值会重置或重新初始化？

var upload = [];

        $upload.upload({

            url: '/ibsapp/app/app/api/libs/upload.php',
            file: file[0],
            data: fileLocation,
        }).success(function (data, status, headers, config) {

                // add publication data
                AppService.insertService('publication', publication).then(function(response){

                    // If unsuccessful in inserting data in the database, delete the files that are uploaded.
                    if(response['status'] === "error"){

                        $upload.upload({

                            url: '/ibsapp/app/app/api/dbHelper/delete.php',
                            data: fileLocation + '/' + file[0].name,
                        });
                        /* upload value is now the response */
                        upload = response;
                });
            }
        });

        /* When I log here, the value of upload is reset to [] */
        console.log(upload);
        return upload;