Fix bug where transitions would not complete if the presentation cont…

…roller didn't implement the startWithContext method. (#45)
material-motion · Sep 21, 2017 · 784328d · 784328d
1 parent 46c92eb
commit 784328d
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/private/MDMViewControllerTransitionCoordinator.m b/src/private/MDMViewControllerTransitionCoordinator.m
@@ -102,7 +102,8 @@ - (instancetype)initWithTransitions:(NSArray<NSObject<MDMTransition> *> *)origin
 
     _completionBlocks = [NSMutableArray array];
 
-    if (_presentationController) {
+    if (_presentationController
+        && [_presentationController respondsToSelector:@selector(startWithContext:)]) {
       _presentationContext =
           [[MDMViewControllerTransitionContext alloc] initWithTransition:nil
                                                                direction:direction