Connect the SONY camera to the iPhone through the data cable, and get pictures taken by the SONY camera on the phone in real time

I need to develop a function for real-time access to pictures taken by SONY camera on iOS. It links iPhone with SONY camera through data cable, and then SONY camera takes pictures and real-time access to pictures taken by camera on iPhone. But at the moment I don't know how to implement this feature.

- (void)sonyAddTimer {    self.timer = [NSTimer scheduledTimerWithTimeInterval:15.0 target:self selector:@selector(getEventData3) userInfo:nil repeats:YES];    [[NSRunLoop currentRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];}- (void)getEventData3 {    //获取事件数据    NSData*               commandBuffer = NULL;    PTPOperationRequest*  request       = [[PTPOperationRequest alloc] init];    request.operationCode       = PTPOperationCodeGetEventData3;    request.numberOfParameters  = 0;    commandBuffer               = request.commandBuffer;    NSLog(@"\nSending PTP request:%@",[request description]);    if (@available(iOS 13.0, *)) {        [self.cameraDevice requestSendPTPCommand:commandBuffer outData:NULL completion:^(NSData * _Nonnull responseData, NSData * _Nonnull ptpResponseData, NSError * _Nullable error) {            NSLog(@"getEventData3---responseData = %@", responseData);            PTPOperationResponse *ptpResponse = NULL;            if ( ptpResponseData ) {                ptpResponse = [[PTPOperationResponse alloc] initWithData:ptpResponseData];                NSLog(@"\n getEventData3 Received response:%@",[ptpResponse description]);                [self getObjectInfoWithInt:0xffffc001];            }        }];    } else {    }}- (void)getObjectInfoWithInt:(int)intValue2 {    //获取对象信息    NSData*               commandBuffer = NULL;    PTPOperationRequest*  request       = [[PTPOperationRequest alloc] init];    request.operationCode       = PTPOperationCodeGetObjectInfo;    request.numberOfParameters  = 1;    request.parameter1          = intValue2;    commandBuffer               = request.commandBuffer;    NSLog(@"\nSending PTP request:%@",[request description]);    if (@available(iOS 13.0, *)) {        [self.cameraDevice requestSendPTPCommand:commandBuffer outData:NULL completion:^(NSData * _Nonnull responseData, NSData * _Nonnull ptpResponseData, NSError * _Nullable error) {            PTPOperationResponse *ptpResponse = NULL;            if ( ptpResponseData ) {                ptpResponse = [[PTPOperationResponse alloc] initWithData:ptpResponseData];                NSLog(@"\n getObjectInfo Received response:%@",[ptpResponse description]);                NSLog(@"getObjectInfo--responseData=%@",responseData);                [self getObjectWithIntValue:intValue2];            }        }];    } else {        // Fallback on earlier versions    }}- (void)getObjectWithIntValue:(int)intValue2 {    //获取对象    NSData*               commandBuffer = NULL;    PTPOperationRequest*  request       = [[PTPOperationRequest alloc] init];    request.operationCode       = PTPOperationCodeGetObject;    request.numberOfParameters  = 1;    request.parameter1          = intValue2;    commandBuffer               = request.commandBuffer;    NSLog(@"\nSending PTP request:%@",[request description]);    if (@available(iOS 13.0, *)) {        [self.cameraDevice requestSendPTPCommand:commandBuffer outData:NULL completion:^(NSData * _Nonnull responseData, NSData * _Nonnull ptpResponseData, NSError * _Nullable error) {            PTPOperationResponse *ptpResponse = NULL;            if ( ptpResponseData ) {                ptpResponse = [[PTPOperationResponse alloc] initWithData:ptpResponseData];                NSLog(@"\n getObject Received response:%@",[ptpResponse description]);                NSLog(@"getObject---responseData=%@",responseData);                UIImage *image = [UIImage imageWithData:responseData];                if (image) {                    NSString *imgMd5String = [self calculateMD5ForJPEGImage:image];                    NSLog(@"图片MD5值 imgMd5String = %@",imgMd5String);                    [self uploadImageWithImage:image md5String:imgMd5String];                }            }        }];    } else {    }}

This is the code I tried to write, but with the frequent disconnection and re-link of the camera, I have confirmed that the data cable and the camera plug are in good condition.