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fix crash

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fix crash by removing observer when operation finished
This commit is contained in:
Michael Chen 2018-09-05 13:22:43 -04:00
parent 05068ec879
commit 234143a416
1 changed files with 6 additions and 1 deletions
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7
MVMCore/MVMCore/PresentationHandling/MVMCoreNavigationOperation.m
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@ -17,6 +17,7 @@
@interface MVMCoreNavigationOperation ()
@property (strong, nonatomic) MVMCoreNavigationObject *navigationObject;
@property (strong, nonatomic) id animatedTransitioning;
@end
@ -217,6 +218,10 @@
[[MVMCoreLoadingOverlayHandler sharedLoadingOverlay] stopLoading:YES];
self.navigationObject.stopLoadingOverlay = NO;
}
if (self.animatedTransitioning) {
[self.animatedTransitioning removeObserver:self forKeyPath:@"interactiveTransitionCanceled"];
self.animatedTransitioning = nil;
}
[super markAsFinished];
}
@ -244,6 +249,7 @@
id animatedTransitioning = [self.delegate navigationController:navigationController animationControllerForOperation:operation fromViewController:fromVC toViewController:toVC];
if ([animatedTransitioning conformsToProtocol:@protocol(MVMCoreViewControllerAnimatedTransitioning)]) {
[animatedTransitioning addObserver:self forKeyPath:@"interactiveTransitionCanceled" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil];
self.animatedTransitioning = animatedTransitioning;
}
return animatedTransitioning;
} else {
@ -261,7 +267,6 @@
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context {
if ([keyPath isEqualToString:@"interactiveTransitionCanceled"]) {
[object removeObserver:self forKeyPath:@"interactiveTransitionCanceled"];
BOOL transitionCanceled = ((NSNumber *)change[NSKeyValueChangeNewKey]).boolValue;
if (transitionCanceled) {
//When interactive transition canceled, the destination viewController should be removed from navigationController