- Revert dealloc logic regarding direct reference to ivars

Author: alexhillc

Source/Classes/DZNWebViewController.m

@@ -27,8 +27,8 @@ @interface DZNWebViewController ()
 @property (nonatomic, strong) UILongPressGestureRecognizer *backwardLongPress;
 @property (nonatomic, strong) UILongPressGestureRecognizer *forwardLongPress;
 
-@property (nonatomic, strong) UINavigationBar *navigationBar;
 @property (nonatomic, weak) UIToolbar *toolbar;
+@property (nonatomic, strong) UINavigationBar *navigationBar;
 @property (nonatomic, weak) UIView *navigationBarSuperView;
 
 @property (nonatomic) BOOL completedInitialLoad;
@@ -877,9 +877,9 @@ - (void)viewDidUnload
 - (void)dealloc
 {
     if (_hideBarsWithGestures) {
-        [_navigationBar removeObserver:self forKeyPath:@"hidden" context:&DZNWebViewControllerKVOContext];
-        [_navigationBar removeObserver:self forKeyPath:@"center" context:&DZNWebViewControllerKVOContext];
-        [_navigationBar removeObserver:self forKeyPath:@"alpha" context:&DZNWebViewControllerKVOContext];
+        [self.navigationBar removeObserver:self forKeyPath:@"hidden" context:&DZNWebViewControllerKVOContext];
+        [self.navigationBar removeObserver:self forKeyPath:@"center" context:&DZNWebViewControllerKVOContext];
+        [self.navigationBar removeObserver:self forKeyPath:@"alpha" context:&DZNWebViewControllerKVOContext];
     }
     [_webView removeObserver:self forKeyPath:@"loading" context:&DZNWebViewControllerKVOContext];