Device orientation delegate method and podfile update (#66)

* Update podfile to latest cocoapods format.
Updated .gitignore to ignore example/pod changes

* Removing cached files inside the example/pod folder to ignore Example/Pods/* files moving forward.

* Podfile update (#1)

* Update podfile to latest cocoapods format.
Updated .gitignore to ignore example/pod changes

* Removing cached files inside the example/pod folder to ignore Example/Pods/* files moving forward.

* Fixes the following warning: "Assigning to 'id<CAAnimationDelegate> _Nullable' from incompatible type 'DCPathButton *const __strong'" (#2)

* - Added DCPathButton delegate method for device orientation changes.
- Updated example project to show use of new delegate method on device orientation change.

.gitignore

@@ -14,3 +14,5 @@ profile
 *.moved-aside
 DerivedData
 .idea/
+
+Example/Pods

.travis.yml

@@ -1,4 +1,9 @@
+--- 
 language: objective-c
-xcode_workspace: Example/Example.xcworkspace
-xcode_scheme: Example
+osx_image: xcode8.3
 podfile: Example/Podfile
+xcode_scheme: Example
+xcode_workspace: Example/Example.xcworkspace
+before_install:
+  - brew update
+  - brew outdated xctool || brew upgrade xctool

DCPathButton/Classes/DCPathButton.h

@@ -14,6 +14,15 @@
 
 @class DCPathButton;
 
+/*!
+ *  The device orientation.
+ */
+typedef NS_ENUM(NSInteger, DCPathButtonOrientation) {
+    DCPathButtonOrientationUnknown,
+    DCPathButtonOrientationPortrait,
+    DCPathButtonOrientationLandscape
+};
+
 /*!
  *  The direction of a `DCPathButton` object's bloom animation.
  */
@@ -93,6 +102,14 @@ typedef NS_ENUM(NSUInteger, kDCPathButtonBloomDirection) {
  */
 - (void)didDismissDCPathButtonItems:(DCPathButton *)dcPathButton;
 
+/*!
+ * Tells the delegate the device orientation changed.  Use this method to change the path buttons center.
+ *
+ * @param dcPathButton A `DCPathButton` object who received a device orientation changed notification.
+ * @param orientation The updated device orientation.
+ */
+- (void)pathButton:(DCPathButton *)dcPathButton didUpdateOrientation:(DCPathButtonOrientation)orientation;
+
 @end
 
 @interface DCPathButton : UIView <UIGestureRecognizerDelegate>

DCPathButton/Classes/DCPathButton.m

@@ -94,10 +94,16 @@ - (instancetype)initWithButtonFrame:(CGRect)centerButtonFrame
 
         _basicDuration = 0.3f;
 
+        [self configureDeviceOrientationObserver];
+
     }
     return self;
 }
 
+- (void)dealloc {
+    [self cleanUpOrientationObservers];
+}
+
 - (void)configureViewsLayoutWithButtonSize:(CGSize)centerButtonSize {
     // Init some property only once
     //
@@ -256,6 +262,47 @@ - (BOOL)isBloom {
     return _bloom;
 }
 
+#pragma mark - Orientation Changes
+
+- (void)configureDeviceOrientationObserver {
+    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
+
+    // Register for orientation change notifications.
+    //
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(updateDCPathButtonForOrientationChangeNotification:)
+                                                 name:UIDeviceOrientationDidChangeNotification
+                                               object:nil];
+}
+
+- (void)updateDCPathButtonForOrientationChangeNotification:(NSNotification *)notification {
+    UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
+
+    if ([self.delegate respondsToSelector:@selector(pathButton:didUpdateOrientation:)]) {
+        DCPathButtonOrientation dcPathOrientation = [self dcPathOrientationFromOrientation:orientation];
+
+        [self.delegate pathButton:self didUpdateOrientation:dcPathOrientation];
+    }
+}
+
+- (DCPathButtonOrientation)dcPathOrientationFromOrientation:(UIDeviceOrientation)orientation {
+    if (orientation == UIDeviceOrientationUnknown) {
+        return DCPathButtonOrientationUnknown;
+    }
+
+    BOOL isPortrait = UIDeviceOrientationIsPortrait(orientation);
+
+    return (isPortrait ? DCPathButtonOrientationPortrait : DCPathButtonOrientationLandscape);
+}
+
+- (void)cleanUpOrientationObservers {
+    // Stop generating orientation notifications.
+    //
+    [[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
+
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
 #pragma mark - Center Button Delegate
 
 - (void)centerButtonTapped {