AVCaptureDevice depreciated to AVCaptureDeviceDiscoverySession use front camera - ios

Question

Can't find an up-to-date answer on this:
- (void)viewDidLoad {
[super viewDidLoad];
AVCaptureSession *session = [[AVCaptureSession alloc] init];
session.sessionPreset = AVCaptureSessionPresetHigh;
AVCaptureDevice *device = [self frontCamera];
NSError *error = nil;
AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
[session addInput:input];
AVCaptureVideoPreviewLayer *newCaptureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
newCaptureVideoPreviewLayer.frame = self.view.bounds;
[self.view.layer addSublayer:newCaptureVideoPreviewLayer];
[self.view bringSubviewToFront:_logo];
[session startRunning];
}
- (AVCaptureDevice *)frontCamera {
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices) {
if ([device position] == AVCaptureDevicePositionFront) {
return device;
}
}
return nil;
}
The NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]; is depreciated and is asking to use AVCaptureDeviceDiscoverySession. How can I correctly implement AVCaptureDeviceDiscoverySession to this code?
I would just like to use the front camera.
Thanks

Answer 1

You can access front camera by code blow.
- (AVCaptureDevice *)frontCamera {
NSArray *devices;
if (#available(iOS 10.0, *)) {
AVCaptureDeviceDiscoverySession *session = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:#[AVCaptureDeviceTypeBuiltInTrueDepthCamera, AVCaptureDeviceTypeBuiltInWideAngleCamera] mediaType:AVMediaTypeVideo position:AVCaptureDevicePositionFront];
devices = session.devices;
}else{
devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
}
for (AVCaptureDevice *device in devices) {
if ([device position] == AVCaptureDevicePositionFront) {
return device;
}
}
return nil;
}
According to Apple's docs:
AVCaptureDeviceDiscoverySession can find available capture devices currently as also as monitor availability of specified device.
AVCaptureDeviceTypeBuiltInWideAngleCamera specify normal front camera.
AVCaptureDeviceTypeBuiltInTrueDepthCamera specify depth front camera base infrared, which only available on iPhone X.