Merge pull request #366 from apptentive/feature/close-all-ui-3

Add "cause" to About VC close event if needed

ApptentiveConnect/source/Message Center/Controllers/ApptentiveAboutViewController.m

@@ -28,10 +28,11 @@ @interface ApptentiveAboutViewController ()
 @property (weak, nonatomic) IBOutlet NSLayoutConstraint *privacyButtonLeadingConstraint;
 @property (weak, nonatomic) IBOutlet NSLayoutConstraint *aboutButtonPrivacyButtonVeritcalConstraint;
 
-
 @property (strong, nonatomic) NSArray *portraitConstraints;
 @property (strong, nonatomic) NSArray *landscapeConstraints;
 
+@property (strong, nonatomic) NSDictionary *closeEventUserInfo;
+
 @end
 
 
@@ -56,12 +57,16 @@ - (void)viewDidLoad {
 
 	self.landscapeConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[about]-(16)-[privacy]" options:NSLayoutFormatAlignAllBaseline metrics:nil views:@{ @"about": self.aboutButton,
 		@"privacy": self.privacyButton }];
+
+	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(addCause) name:ApptentiveInteractionsShouldDismissNotification object:nil];
 }
 
 - (void)viewWillDisappear:(BOOL)animated {
 	[super viewWillDisappear:animated];
 
-	[[Apptentive sharedConnection].engagementBackend engageCodePoint:[self codePointForEvent:ATInteractionAboutViewEventLabelClose] fromInteraction:nil userInfo:nil customData:nil extendedData:nil fromViewController:self];
+	[[NSNotificationCenter defaultCenter] removeObserver:self];
+
+	[[Apptentive sharedConnection].engagementBackend engageCodePoint:[self codePointForEvent:ATInteractionAboutViewEventLabelClose] fromInteraction:nil userInfo:self.closeEventUserInfo customData:nil extendedData:nil fromViewController:self];
 }
 
 - (IBAction)learnMore:(id)sender {
@@ -102,4 +107,8 @@ - (void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection {
 	[self.view layoutIfNeeded];
 }
 
+- (void)addCause {
+	self.closeEventUserInfo = @{ @"cause" : @"notification"};
+}
+
 @end