Rework dismissal blocks to allow for interaction with a notice that s…

…upport interactive dismissal and a timeout.

In these cases, the display interval is managed by an NSTimer instead of the UIView animation delay property. This is because of two factors:
1. The UIView animation blocks by default disable interaction with the views.
2. If you enable the option to support interaction, the frame of the button matches the final destination frame instead of the current visible frame. This causes hit tests to fail and for all intents and purposes makes the notice view an untappable target.

NoticeView/WBNoticeView/WBNoticeView.m

@@ -18,11 +18,11 @@ @interface WBNoticeView ()
 @property(nonatomic, assign) CGFloat hiddenYOrigin;
 @property(nonatomic, strong) WBNoticeView *currentNotice;
 @property(nonatomic, copy) void (^dismissalBlock)(BOOL dismissedInteractively);
+@property(nonatomic, strong) NSTimer *displayTimer;
 
 - (void)dismissNoticeWithDuration:(NSTimeInterval)duration
                             delay:(NSTimeInterval)delay
-                    hiddenYOrigin:(CGFloat)hiddenYOrigin
-                    interactively:(BOOL)interactively;
+                    hiddenYOrigin:(CGFloat)hiddenYOrigin;
 - (void)cleanup;
 
 @end
@@ -101,25 +101,26 @@ - (void)displayNotice
     } completion:^ (BOOL finished) {
         if (finished) {
             // if it's not sticky, hide it automatically
-            if (NO == self.isSticky) {
+            if (self.tapToDismissEnabled && !self.isSticky) {
+                // Schedule a timer
+                self.displayTimer = [NSTimer scheduledTimerWithTimeInterval:self.delay target:self selector:@selector(dismissAfterTimerExpiration) userInfo:nil repeats:NO];
+            } else if (!self.isSticky) {
                 // Display for a while, then hide it again
-                [self dismissNoticeWithDuration:self.duration delay:self.delay hiddenYOrigin:self.hiddenYOrigin interactively:NO];
+                [self dismissNoticeWithDuration:self.duration delay:self.delay hiddenYOrigin:self.hiddenYOrigin];
             }
         }
     }];
 }
 
-- (void)dismissNoticeWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay hiddenYOrigin:(CGFloat)hiddenYOrigin interactively:(BOOL)interactively
+- (void)dismissNoticeWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay hiddenYOrigin:(CGFloat)hiddenYOrigin
 {
     [UIView animateWithDuration:duration delay:delay options:UIViewAnimationOptionCurveEaseOut animations:^ {
         CGRect newFrame = self.gradientView.frame;
         newFrame.origin.y = hiddenYOrigin;
         self.gradientView.frame = newFrame;
     } completion:^ (BOOL finished) {
         if (finished) {  
-            if (self.dismissalBlock) {
-                self.dismissalBlock(interactively);
-            }
+            if (self.dismissalBlock) self.dismissalBlock(NO);
             // Cleanup
             [self cleanup];
         }
@@ -128,18 +129,32 @@ - (void)dismissNoticeWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval
 
 - (void)dismissNotice
 {
-    [self dismissNoticeWithDuration:self.duration delay:self.delay hiddenYOrigin:self.hiddenYOrigin interactively:NO];
+    [self.displayTimer invalidate];
+    [self dismissNoticeWithDuration:self.duration delay:self.delay hiddenYOrigin:self.hiddenYOrigin];
 }
 
 - (void)dismissNoticeInteractively
 {
-    [self dismissNoticeWithDuration:self.duration delay:self.delay hiddenYOrigin:self.hiddenYOrigin interactively:YES];
+    [self.displayTimer invalidate];
+    if (self.dismissalBlock) {
+        self.dismissalBlock(YES);
+
+        // Clear the reference to the dismissal block so that the animation does invoke the block a second time
+        self.dismissalBlock = nil;
+    }
+    [self dismissNoticeWithDuration:self.duration delay:self.delay hiddenYOrigin:self.hiddenYOrigin];
+}
+
+- (void)dismissAfterTimerExpiration
+{
+    [self dismissNoticeWithDuration:self.duration delay:0.0 hiddenYOrigin:self.hiddenYOrigin];
 }
 
 #pragma mark -
 
 - (void)cleanup
 {
+    [self.displayTimer invalidate];
     [self.gradientView removeFromSuperview];
     self.gradientView = nil;
     self.titleLabel = nil;