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Fix crash when handling a dialog result #1417

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merged 2 commits into from
Apr 29, 2024
Merged

Fix crash when handling a dialog result #1417

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a1a66bf
Synchronize queue reads and writes on self.queue
emawby Apr 24, 2024
790b776
move displayDialog outside of synchronized blocks
emawby Apr 29, 2024
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51 changes: 29 additions & 22 deletions iOS_SDK/OneSignalSDK/Source/OneSignalDialogController.m
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Original file line number Diff line number Diff line change
Expand Up @@ -60,14 +60,14 @@ - (void)presentDialogWithTitle:(NSString * _Nonnull)title withMessage:(NSString
//ensure this UI code executes on the main thread
dispatch_async(dispatch_get_main_queue(), ^{
let request = [[OSDialogRequest alloc] initWithTitle:title withMessage:message withActionTitles:actionTitles withCancelTitle:cancelTitle withCompletion:completion];

[self.queue addObject:request];

//check if already presenting a different dialog
//if so, we shouldn't present on top of existing dialog
if (self.queue.count > 1)
return;

@synchronized (self.queue) {
[self.queue addObject:request];
//check if already presenting a different dialog
//if so, we shouldn't present on top of existing dialog
if (self.queue.count > 1)
return;
}
[self displayDialog:request];
});
}
Expand Down Expand Up @@ -101,23 +101,30 @@ - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)butto

- (void)delayResult:(int)result {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.25 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
let currentDialog = self.queue.firstObject;

if (currentDialog.completion)
currentDialog.completion(result);

[self.queue removeObjectAtIndex:0];

//check if no more dialogs left to display in queue
if (self.queue.count == 0)
return;

let nextDialog = self.queue.firstObject;

[self displayDialog:nextDialog];
OSDialogRequest *nextDialog = nil;
@synchronized (self.queue) {
if (self.queue.count > 0) {
let currentDialog = self.queue.firstObject;

if (currentDialog.completion)
currentDialog.completion(result);

[self.queue removeObjectAtIndex:0];
}

//check if no more dialogs left to display in queue
if (self.queue.count == 0)
return;

nextDialog = self.queue.firstObject;
}
if (nextDialog != nil) {
[self displayDialog:nextDialog];
}
});
}

// Unused. Currently only referenced in player model unit tests
- (void)clearQueue {
self.queue = [NSMutableArray new];
}
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