Lately, I got a lot of crashlogs in Crashlytics and I don't really know why.
com.apple.main-thread
0 libsystem_kernel.dylib 0x1837dc60c __semwait_signal + 8
1 libsystem_c.dylib 0x1836f4f70 nanosleep + 212
2 libsystem_c.dylib 0x1836f4e90 usleep + 64
3 MyProject 0x10336b554 -[MyViewController .cxx_destruct] + 2732324
4 MyProject 0x1031d4424 -[MyViewController .cxx_destruct] + 1064948
5 MyProject 0x1031d3ec4 -[MyViewController .cxx_destruct] + 1063572
6 MyProject 0x1030e4c8c -[MyViewController .cxx_destruct] + 84060
[MyViewController .cxx_destruct] is called multiple times in multiple threads.
The crash is not repeatable for me. It seems to happen if the app was in the background for a long time. I'm also pretty sure, that the view referenced in the crashlog is not being displayed and probably never was! It's only a view "about the app" which is even pretty difficult to find for a user.
#import "MyViewController.h"
#import "Localization.h"
#import "AppData.h"
@interface MyViewController ()
@property (weak, nonatomic) IBOutlet UILabel *myLabel;
... and many more
@end
@implementation MyViewController
- (void)viewDidLoad {
[super viewDidLoad];
//set logo, text and so on
...
}
#pragma mark - Action handler
- (IBAction)handleCloseActionPerformed:(id)sender {
dispatch_async(dispatch_get_main_queue(), ^{
[self dismissViewControllerAnimated:YES completion:nil];
});
}
@end
The way users can open the view is with a click that executes the following code or by clicking a Bar Button Item.
NSString * storyboardName = @"Main";
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
UIViewController * vc = [storyboard instantiateViewControllerWithIdentifier:@"AboutViewController"];;
[self presentViewController:vc animated:YES completion:nil];
