Add option to use front camera for capture (#110)

Author: koke

Example/WPMediaPicker/DemoViewController.m

@@ -129,6 +129,7 @@ - (void) showPicker:(id) sender
     mediaPicker.delegate = self;
     mediaPicker.showMostRecentFirst = [self.options[MediaPickerOptionsShowMostRecentFirst] boolValue];
     mediaPicker.allowCaptureOfMedia = [self.options[MediaPickerOptionsShowCameraCapture] boolValue];
+    mediaPicker.preferFrontCamera = [self.options[MediaPickerOptionsPreferFrontCamera] boolValue];
     mediaPicker.allowMultipleSelection = [self.options[MediaPickerOptionsAllowMultipleSelection] boolValue];
     mediaPicker.modalPresentationStyle = UIModalPresentationPopover;
     UIPopoverPresentationController *ppc = mediaPicker.popoverPresentationController;

Example/WPMediaPicker/OptionsViewController.h

@@ -2,6 +2,7 @@
 
 extern NSString const *MediaPickerOptionsShowMostRecentFirst;
 extern NSString const *MediaPickerOptionsShowCameraCapture;
+extern NSString const *MediaPickerOptionsPreferFrontCamera;
 extern NSString const *MediaPickerOptionsAllowMultipleSelection;
 extern NSString const *MediaPickerOptionsPostProcessingStep;
 

Example/WPMediaPicker/OptionsViewController.m

@@ -3,12 +3,14 @@
 NSString const *MediaPickerOptionsShowMostRecentFirst = @"MediaPickerOptionsShowMostRecentFirst";
 NSString const *MediaPickerOptionsUsePhotosLibrary = @"MediaPickerOptionsUsePhotosLibrary";
 NSString const *MediaPickerOptionsShowCameraCapture = @"MediaPickerOptionsShowCameraCapture";
+NSString const *MediaPickerOptionsPreferFrontCamera = @"MediaPickerOptionsPreferFrontCamera";
 NSString const *MediaPickerOptionsAllowMultipleSelection = @"MediaPickerOptionsAllowMultipleSelection";
 NSString const *MediaPickerOptionsPostProcessingStep = @"MediaPickerOptionsPostProcessingStep";
 
 typedef NS_ENUM(NSInteger, OptionsViewControllerCell){
     OptionsViewControllerCellShowMostRecentFirst,
     OptionsViewControllerCellShowCameraCapture,
+    OptionsViewControllerCellPreferFrontCamera,
     OptionsViewControllerCellAllowMultipleSelection,
     OptionsViewControllerCellPostProcessingStep,
     OptionsViewControllerCellTotal
@@ -18,6 +20,7 @@ @interface OptionsViewController ()
 
 @property (nonatomic, strong) UITableViewCell *showMostRecentFirstCell;
 @property (nonatomic, strong) UITableViewCell *showCameraCaptureCell;
+@property (nonatomic, strong) UITableViewCell *preferFrontCameraCell;
 @property (nonatomic, strong) UITableViewCell *allowMultipleSelectionCell;
 @property (nonatomic, strong) UITableViewCell *postProcessingStepCell;
 
@@ -43,6 +46,10 @@ - (void)viewDidLoad
     self.showCameraCaptureCell.accessoryView = [[UISwitch alloc] init];
     ((UISwitch *)self.showCameraCaptureCell.accessoryView).on = [self.options[MediaPickerOptionsShowCameraCapture] boolValue];
     self.showCameraCaptureCell.textLabel.text = @"Show Capture Cell";
+
+    self.preferFrontCameraCell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
+    self.preferFrontCameraCell.accessoryView = [[UISwitch alloc] init];
+    self.preferFrontCameraCell.textLabel.text = @"Prefer Front Camera";
 
     self.allowMultipleSelectionCell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
     self.allowMultipleSelectionCell.accessoryView = [[UISwitch alloc] init];
@@ -76,6 +83,9 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
         case OptionsViewControllerCellShowCameraCapture:
             return self.showCameraCaptureCell;
             break;
+        case OptionsViewControllerCellPreferFrontCamera:
+            return self.preferFrontCameraCell;
+            break;
         case OptionsViewControllerCellAllowMultipleSelection:
             return self.allowMultipleSelectionCell;
             break;
@@ -95,6 +105,7 @@ - (void)done:(id) sender
         NSDictionary *newOptions = @{
              MediaPickerOptionsShowMostRecentFirst:@(((UISwitch *)self.showMostRecentFirstCell.accessoryView).on),
              MediaPickerOptionsShowCameraCapture:@(((UISwitch *)self.showCameraCaptureCell.accessoryView).on),
+             MediaPickerOptionsPreferFrontCamera:@(((UISwitch *)self.preferFrontCameraCell.accessoryView).on),
              MediaPickerOptionsAllowMultipleSelection:@(((UISwitch *)self.allowMultipleSelectionCell.accessoryView).on),
              MediaPickerOptionsPostProcessingStep:@(((UISwitch *)self.postProcessingStepCell.accessoryView).on)
              };

Pod/Classes/WPMediaCapturePreviewCollectionView.h

@@ -2,6 +2,8 @@
 
 @interface WPMediaCapturePreviewCollectionView : UICollectionReusableView
 
+@property (nonatomic, assign) BOOL preferFrontCamera;
+
 - (void)stopCaptureOnCompletion:(void (^)(void))block;
 - (void)startCapture;
 

Pod/Classes/WPMediaCapturePreviewCollectionView.m

@@ -80,8 +80,7 @@ - (void)startCapture
             self.session = [[AVCaptureSession alloc] init];
             self.session.sessionPreset = AVCaptureSessionPreset1280x720;
 
-            AVCaptureDevice *device =
-            [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
+            AVCaptureDevice *device = [self captureDevice];
 
             NSError *error = nil;
             AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
@@ -123,4 +122,16 @@ - (NSString *)accessibilityLabel
     return NSLocalizedString(@"Camera", @"Accessibility label for the camera tile in the collection view");
 }
 
+- (AVCaptureDevice *)captureDevice
+{
+    if (self.preferFrontCamera) {
+        for (AVCaptureDevice *device in [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]) {
+            if (device.position == AVCaptureDevicePositionFront) {
+                return device;
+            }
+        }
+    }
+    return [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
+}
+
 @end

Pod/Classes/WPMediaCollectionViewController.h

@@ -8,6 +8,11 @@
  */
 @property (nonatomic, assign) BOOL allowCaptureOfMedia;
 
+/**
+ If the media picker allows media capturing, it will use the front camera by default when possible
+ */
+@property (nonatomic, assign) BOOL preferFrontCamera;
+
 /**
  If set the picker will show the most recent items on the top left. If not set it will show on the bottom right. Either way it will always scroll to the most recent item when showing the picker.
  */

Pod/Classes/WPMediaCollectionViewController.m

@@ -41,6 +41,7 @@ - (instancetype)init
         _layout = layout;
         _selectedAssets = [[NSMutableArray alloc] init];
         _allowCaptureOfMedia = YES;
+        _preferFrontCamera = NO;
         _showMostRecentFirst = NO;
         _filter = WPMediaTypeVideoOrImage;
         _refreshGroupFirstTime = YES;
@@ -413,6 +414,7 @@ - (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView
             UIGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(showCapture)];
             [self.captureCell addGestureRecognizer:tapGestureRecognizer];
         }
+        self.captureCell.preferFrontCamera = self.preferFrontCamera;
         [self.captureCell startCapture];
         return self.captureCell;
     }
@@ -571,12 +573,22 @@ - (void)showMediaCaptureViewController
     imagePickerController.mediaTypes = [mediaTypes allObjects];
     imagePickerController.delegate = self;
     imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
+    imagePickerController.cameraDevice = [self cameraDevice];
     imagePickerController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
     [self presentViewController:imagePickerController animated:YES completion:^{
 
     }];
 }
 
+- (UIImagePickerControllerCameraDevice)cameraDevice
+{
+    if (self.preferFrontCamera && [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront]) {
+        return UIImagePickerControllerCameraDeviceFront;
+    } else {
+        return UIImagePickerControllerCameraDeviceRear;
+    }
+}
+
 - (void)captureMedia
 {
     NSString *mediaType = AVMediaTypeVideo;

Pod/Classes/WPMediaPickerViewController.h

@@ -20,6 +20,11 @@
  */
 @property (nonatomic, assign) BOOL allowCaptureOfMedia;
 
+/**
+ If the media picker allows media capturing, it will use the front camera by default when possible
+ */
+@property (nonatomic, assign) BOOL preferFrontCamera;
+
 /**
  If set the picker will allow the selection of multiple items. By default this value is YES.
  */

Pod/Classes/WPMediaPickerViewController.m

@@ -13,6 +13,7 @@ - (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibB
     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
     if (self) {
         _allowCaptureOfMedia = YES;
+        _preferFrontCamera = NO;
         _showMostRecentFirst = NO;
         _allowMultipleSelection = YES;
         _filter = WPMediaTypeVideoOrImage;
@@ -39,6 +40,7 @@ - (void)setupNavigationController
 {
     WPMediaCollectionViewController *vc = [[WPMediaCollectionViewController alloc] init];
     vc.allowCaptureOfMedia = self.allowCaptureOfMedia;
+    vc.preferFrontCamera = self.preferFrontCamera;
     vc.showMostRecentFirst = self.showMostRecentFirst;
     vc.filter = self.filter;
     vc.allowMultipleSelection = self.allowMultipleSelection;