Added delegate calls for drag begin and ended

Example/GKPictureInPictureView/GKViewController.m

@@ -62,4 +62,12 @@ - (void)pictureInPictureView:(GKPictureInPictureView *)pictureInPictureView chan
     [self.pipView setPosition:position animated:YES];
 }
 
+- (void)pictureInPictureViewBeganDragging:(GKPictureInPictureView *)pictureInPictureView {
+    NSLog(@"%@ began dragging", pictureInPictureView);
+}
+
+- (void)pictureInPictureViewEndedDragging:(GKPictureInPictureView *)pictureInPictureView {
+    NSLog(@"%@ ended dragging", pictureInPictureView);
+}
+
 @end

GKPictureInPictureView.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'GKPictureInPictureView'
-  s.version          = '0.1.0'
+  s.version          = '0.2.0'
   s.summary          = 'FaceTime/iOS PiP like throwable view'
 
 # This description is used to generate tags and improve search results.

GKPictureInPictureView/Classes/GKPictureInPictureView.h

@@ -42,6 +42,20 @@ typedef NS_ENUM(NSUInteger, GKPictureInPictureViewSize) {
  */
 - (void)pictureInPictureView:(GKPictureInPictureView *)pictureInPictureView changedSizeClass:(GKPictureInPictureViewSize)sizeClass;
 
+/**
+ This method will be called when the user start to drag the view.
+ 
+ @property pictureInPictureView The view which has changed position
+ */
+- (void)pictureInPictureViewBeganDragging:(GKPictureInPictureView *)pictureInPictureView;
+
+/**
+ This method will be called when the user stops dragging operation.
+ 
+ @property pictureInPictureView The view which has changed position
+ */
+- (void)pictureInPictureViewEndedDragging:(GKPictureInPictureView *)pictureInPictureView;
+
 @end
 
 

GKPictureInPictureView/Classes/GKPictureInPictureView.m

@@ -186,6 +186,11 @@ - (void)pan:(UIPanGestureRecognizer *)gesutreRecognizer {
 
     if (gesutreRecognizer.state == UIGestureRecognizerStateBegan) {
         self.panInitialCenter = piece.center;
+        if (self.delegate &&
+            [self.delegate respondsToSelector:@selector(pictureInPictureViewBeganDragging:)]) {
+            [self.delegate pictureInPictureViewBeganDragging:self];
+        }
+        return;
     }
 
     if (gesutreRecognizer.state != UIGestureRecognizerStateCancelled) {
@@ -205,6 +210,11 @@ - (void)pan:(UIPanGestureRecognizer *)gesutreRecognizer {
             } completion:^(BOOL finished) {
                 [self refreshAnimated:NO];
             }];
+
+            if (self.delegate &&
+                [self.delegate respondsToSelector:@selector(pictureInPictureViewEndedDragging:)]) {
+                [self.delegate pictureInPictureViewEndedDragging:self];
+            }
         }
     } else {
         piece.center = self.panInitialCenter;
@@ -231,7 +241,6 @@ - (void)pinch:(UIPinchGestureRecognizer *)gestureRecognizer {
             }];
         }
     }
-
 }
 
 - (void)doubleTap:(UITapGestureRecognizer *)gestureRecognizer {