ios - Objective-C AVCaptureDevice Front Camera -


i have followed tutorial guided through way make custom simple camera app, needs of use it. have 2 issues need changing focus on first 1 now.

the following code allows use of camera, need changed can use front camera. link here video sourced give them credit, , followed 1 of commenters said using front camera answer didn't @ all.

https://www.youtube.com/watch?v=xv1ffqvy-km

i'm not excellent @ coding @ all, trying learn. appreciated! many thanks.

@interface viewcontroller ()  @end  @implementation viewcontroller  avcapturesession *session; avcapturestillimageoutput *stillimageoutput;  - (void)viewdidload {     [super viewdidload];     // additional setup after loading view, typically nib. }  - (void)viewwillappear:(bool)animated {      session = [[avcapturesession alloc] init];      [session setsessionpreset:avcapturesessionpresetphoto];      avcapturedevice *inputdevice = [avcapturedevice defaultdevicewithmediatype:avmediatypevideo];      nserror *error;      avcapturedeviceinput *deviceinput = [avcapturedeviceinput deviceinputwithdevice:inputdevice error:&error];        if ([session canaddinput:deviceinput]) {          [session addinput:deviceinput];      }        avcapturevideopreviewlayer *previewlayer = [[avcapturevideopreviewlayer alloc] initwithsession:session];      [previewlayer setvideogravity:avlayervideogravityresizeaspectfill];      calayer *rootlayer = [[self view] layer];      [rootlayer setmaskstobounds:yes];      cgrect frame = frameforcapture.frame;        [previewlayer setframe:frame];        [rootlayer insertsublayer:previewlayer atindex:0];          stillimageoutput = [[avcapturestillimageoutput alloc] init];      nsdictionary *outputsettings = [[nsdictionary alloc] initwithobjectsandkeys:avvideocodecjpeg, avvideocodeckey, nil];      [stillimageoutput setoutputsettings:outputsettings];        [session addoutput:stillimageoutput];        [session startrunning];  }    - (void)didreceivememorywarning {     [super didreceivememorywarning];     // dispose of resources can recreated. }  - (ibaction)takephoto:(id)sender {      avcaptureconnection *videoconnection = nil;      (avcaptureconnection *connection in stillimageoutput.connections) {         (avcaptureinputport *port in [connection inputports ]) {             if ([[port mediatype] isequal:avmediatypevideo]) {                 videoconnection = connection;                 break;             }         }     }     [stillimageoutput capturestillimageasynchronouslyfromconnection:videoconnection completionhandler:^(cmsamplebufferref imagedatasamplebuffer, nserror *error) {         if (imagedatasamplebuffer != null) {             nsdata *imagedata = [avcapturestillimageoutput jpegstillimagensdatarepresentation:imagedatasamplebuffer];             uiimage *image = [uiimage imagewithdata:imagedata];             imageview.image = image;         }     }]; }  @end

this code returns avcapturedevice instance default device of given media type.

avcapturedevice *inputdevice = [avcapturedevice defaultdevicewithmediatype:avmediatypevideo];

change code to

.... avcapturedevice *inputdevice = nil; nsarray *devices = [avcapturedevice deviceswithmediatype:avmediatypevideo]; for(avcapturedevice *camera in devices) {     if([camera position] == avcapturedevicepositionfront) { // front camera           inputdevice = camera;         break;     } } ......

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