Merge pull request mutualmobile#271 from pronebird/appearance-patch

Do not forward appearance events to central VC when drawer is offscreen

MMDrawerController/MMDrawerController.m

@@ -218,7 +218,7 @@ - (void)decodeRestorableStateWithCoder:(NSCoder *)coder{
     [super decodeRestorableStateWithCoder:coder];
 
     if ((controller = [coder decodeObjectForKey:MMDrawerLeftDrawerKey])){
-        self.leftDrawerViewController = [coder decodeObjectForKey:MMDrawerLeftDrawerKey];
+        self.leftDrawerViewController = controller;
     }
 
     if ((controller = [coder decodeObjectForKey:MMDrawerRightDrawerKey])){
@@ -426,8 +426,11 @@ -(void)setCenterViewController:(UIViewController *)centerViewController animated
     [self updateShadowForCenterView];
 
     if(animated == NO){
-        [self.centerViewController beginAppearanceTransition:YES animated:NO];
-        [self.centerViewController endAppearanceTransition];
+        // If drawer is offscreen, then viewWillAppear: will take care of this
+        if(self.view.window) {
+            [self.centerViewController beginAppearanceTransition:YES animated:NO];
+            [self.centerViewController endAppearanceTransition];
+        }
         [self.centerViewController didMoveToParentViewController:self];
     }
 }
@@ -803,6 +806,11 @@ - (void)setDrawerViewController:(UIViewController *)viewController forSide:(MMDr
     NSParameterAssert(drawerSide != MMDrawerSideNone);
 
     UIViewController *currentSideViewController = [self sideDrawerViewControllerForSide:drawerSide];
+
+    if (currentSideViewController == viewController) {
+        return;
+    }
+
     if (currentSideViewController != nil) {
         [currentSideViewController beginAppearanceTransition:NO animated:NO];
         [currentSideViewController.view removeFromSuperview];