Merge pull request #203 from artsy/alloy-try-to-fix-crash

@orta => Tries to fix #103 and various related tickets.

Artsy/Classes/View Controllers/ARArtworkViewController.m

@@ -85,6 +85,11 @@ - (UIImageView *)imageView
 
 - (void)viewDidAppear:(BOOL)animated
 {
+    self.view.delegate = self;
+    self.view.metadataView.delegate = self;
+    self.view.artworkBlurbView.delegate = self;
+    self.postsVC.delegate = self;
+
     // When we get back from zoom / VIR allow the preview to do trigger zoom
     self.view.metadataView.userInteractionEnabled = YES;
     [super viewDidAppear:self.shouldAnimate && animated];
@@ -95,6 +100,13 @@ - (void)viewDidDisappear:(BOOL)animated
     [self.view.relatedArtworksView cancel];
     self.view.scrollsToTop = NO;
 
+    // See https://github.com/artsy/eigen/issues/103
+    self.view.delegate = nil;
+    // And nill-ify these as well, for good measure.
+    self.view.metadataView.delegate = nil;
+    self.view.artworkBlurbView.delegate = nil;
+    self.postsVC.delegate = nil;
+
     [super viewDidDisappear:self.shouldAnimate && animated];
 }
 

Artsy/Classes/Views/ARArtworkView.m

@@ -105,9 +105,9 @@ - (void)setUpCallbacks
     }];
 
     [self.artwork onFairUpdate:^(Fair *fair) {
+        @strongify(self);
         if (!self) return;
 
-        @strongify(self);
         [self.metadataView updateWithFair:fair];
         [self.stackView layoutIfNeeded];
     } failure:nil];