Added draggable option

FaceCamViewer.h

@@ -35,10 +35,13 @@ typedef enum{
     IPAD = 2
 } DeviceType;
 
-@interface FaceCamViewer : UIView
+@interface FaceCamViewer : UIView {
+    CGPoint offset;
+}
 
 @property (nonatomic, assign) AVCaptureDevicePosition cameraType;
 @property (nonatomic, strong) AVCaptureSession *session;
+@property (nonatomic, assign) BOOL draggable;
 
 -(id)initWithDeviceType:(DeviceType)type;
 -(void)startFaceCam;

FaceCamViewer.m

@@ -30,7 +30,7 @@
 
 @implementation FaceCamViewer
 
-@synthesize cameraType, session;
+@synthesize cameraType, session, draggable;
 
 - (id)initWithFrame:(CGRect)frame
 {
@@ -71,8 +71,8 @@ -(void)setDefaults {
     [self setBackgroundColor:[UIColor blackColor]];
     self.layer.cornerRadius = 5;
     self.layer.masksToBounds = YES;
-
     self.cameraType = AVCaptureDevicePositionFront;
+    self.draggable = NO;
 }
 
 -(void)startFaceCam {
@@ -82,7 +82,6 @@ -(void)startFaceCam {
         if (!session) {
             session = [[AVCaptureSession alloc] init];
         }
-        //AVCaptureSession *session = [[AVCaptureSession alloc] init];
         session.sessionPreset = AVCaptureSessionPresetMedium;
 
         NSError *error = nil;
@@ -132,4 +131,19 @@ -(AVCaptureDevice *)CameraIfAvailable
     return captureDevice;
 }
 
+-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
+    UITouch *aTouch = [touches anyObject];
+    offset = [aTouch locationInView: self];
+}
+
+- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
+    if (self.draggable) {
+        UITouch *touch = [touches anyObject];
+        CGPoint location = [touch locationInView:self.superview];
+        [UIView beginAnimations:@"Dragging" context:nil];
+        self.frame = CGRectMake(location.x-offset.x, location.y-offset.y, self.frame.size.width, self.frame.size.height);
+        [UIView commitAnimations];
+    }
+}
+
 @end