Tips on NSApp’s ModalForWindow, NSAlert’s ModalForWindow, and ModalSession [closed]
The question is the answer. I’m just posting this to close it out. Sorry for twisting the stackoverflow format.
objective-c
Faking Subpixel Antialiasing on Text with Core Animation
If you’re using a transparent sheet, you don’t know in advance what the pixels below it will be. They may change. Remember that you have a single alpha channel for all three colors: if you make it transparent, you won’t see any subpixel effect, but if you make it opaque, all three subelements are going … Read more
How to constrain autorotation to a single orientation for some views, while allowing all orientations on others?
The short answer is that you’re using UINavigationController, and that won’t work like you want it to. From Apple’s docs: Why won’t my UIViewController rotate with the device? All child view controllers in your UITabBarController or UINavigationController do not agree on a common orientation set. To make sure that all your child view controllers rotate … Read more
How to delete all local notifications when an application is deleted from an iPhone
As others have mentioned, I think the best way to accomplish this is to have a flag in didFinishLaunchingWithOptions in the application delegate that checks if it is the first launch or not. If the app is being launched for the first time, you can call [[UIApplication sharedApplication] cancelAllLocalNotifications]; This will cancel any existing notifications. … Read more
UIPopoverPresentationController should have a non-nil sourceView or barButtonItem set before the presentation occurs on iOS 9
You can create a popover presentation controller like this also and it may work – (IBAction)showPopup:(UIButton *)sender { ViewController *contentViewController = [[ViewController alloc] init]; contentViewController.preferredContentSize = CGSizeMake(200, 200); contentViewController.modalPresentationStyle = UIModalPresentationPopover; UIPopoverPresentationController *popoverpresentationController = contentViewController.popoverPresentationController; popoverpresentationController.delegate = self; popoverpresentationController.permittedArrowDirections = UIPopoverArrowDirectionUp; popoverpresentationController.sourceRect = sender.bounds; popoverpresentationController.sourceView = sender; [self presentViewController:contentViewController animated: YES completion: nil]; }
How to Make a Basic Finite State Machine in Objective-C
I suggest using State Machine Compiler, it will output Objective-C code. I have had good success in Java and Python using this. You shouldn’t be writing state machine code by hand, you should be using something to generate the code for you. SMC will generate clean clear code you can then look at if you … Read more
return from inside a @synchronized block in objective-c
@synchronized will automatically take down its exception-handling context when you return, and relinquish the lock. So the code you’ve written is fine.