该问题的解决方法是手动限制上传文件的大小，在上传文件前进行检查。下面是示例代码：

// 这里限制上传文件的大小为5MB let maxSize: Int64 = 5 * 1024 * 1024

Alamofire.upload(multipartFormData: { multipartFormData in // 将要上传的数据添加到multipartFormData中 multipartFormData.append(imageData, withName: "image") }, to: "https://example.com/upload", method: .post, headers: headers, encodingCompletion: { encodingResult in switch encodingResult { case .success(let upload, _, _): upload.uploadProgress(closure: { progress in // 打印上传进度 print("Upload Progress: (progress.fractionCompleted)") }).responseJSON(completionHandler: { response in // 处理上传结果 print(response) }) case .failure(let encodingError): // 处理上传出错情况 print(encodingError) } })

// 检查上传文件的大小是否超出限制 guard multipartFormData.contentLength <= maxSize else { // 文件大小超出限制，抛出异常 throw NSError(domain: "", code: 0, userInfo: [NSLocalizedDescriptionKey: "文件大小超出限制"]) }