@idit.b. Is it what you are looking for ?

DO you use third party frameworks ? Do you see where the crash occurs ?

Maybe the iPhone is just busy installing some resources. Wait a few more minutes. Have you a developer account ? Did you declare your iPhone in Xcode ? plug iPhone on USB Open Window > Device & Simulators Check your iPhone is properly registered You may also reboot iPhone.

Kindly give me the projects. What do you mean ? Ideas for apps ? That's the most valuable part to have an original idea for an app. No one will give it I fear. To get such ideas, just look around, in various rooms of your home, or in the street, looking at the sky, in various situations of daily life, asking you: Where should I need some help ? manage food and diet ? fitness help ? your book shelves management… There are so many ideas for those who know how to observe. Good luck.

Please show the full crash report for the above code. I don't understand your code if (self.selectedIndex==-1)  { NSIndexPath *prev = [NSIndexPath indexPathForRow:self.selectedIndex inSection:0]; WIth selectedIndex==-1, what is value of previous (null ?) Add a log to test for prev.

What you describe is surprising. majorVersion should be an integer(10, 11, 12), not 10.16. var majorVersion: Int The major release number, such as 10 in version 10.9.3. var minorVersion: Int The minor release number, such as 9 in version 10.9.3. var patchVersion: Int The update release number, such as 3 in version 10.9.3. Could you show the code where you call for it ? MacOS 10 ended at 10.15. Further beta (11ß) were sometimes named 10.16. But this is surprising for 12ß. Is it a remaining string left by mistake ?

Here is how to add a button to annotation: https://stackoverflow.com/questions/41495956/how-to-add-button-to-mkpointannotation-in-swift That seems close to what you've done, as MKPinAnnotationView is deprecated. Or more recent: https://stackoverflow.com/questions/57086152/how-do-i-add-button-to-mkpointannotation-in-swift Replace as well MKPinAnnotationView

Important lines are those (canShowCallout = true): pinView?.canShowCallout = true let rightButton: AnyObject! = UIButton(type: UIButton.ButtonType.detailDisclosure) pinView?.rightCalloutAccessoryView = rightButton as? UIView You could store those date in UserDefaults (if the list is not excessively long). var myArrayOfPoints : [CLLocationCoordinate2D] = [] // I think it is CLLocationCoordinate2D, check it. You may prefer to save Strings of names ?         let defaults = UserDefaults.standard         defaults.set(myArrayOfPoints, forKey: "PointsOfInterestKey") Then you can retrieve easily from anywhere in app, and it is saved when you close app or even update the app.         let defaults = UserDefaults.standard         myArrayOfPoints = defaults.string(forKey: "PointsOfInterestKey") ?? [] Or in a local file.

The API deals with 3 numbers for version: Major Minor Patch, hence 2.8.1 for instance. Here is the best spec I could find: Version Components majorVersion The major release number, such as 10 in version 10.9.3. minorVersion The minor release number, such as 9 in version 10.9.3. patchVersion The update release number, such as 3 in version 10.9.3.

There is something I don't understand: is it a SwiftUI app ? That's what the tag says. how do you have a storyboard if so ? Could you try the same on LaunchScreen storyboard ? Could you show the header you get when you open as XML ? Did you update Xcode recently (it seems you have Xcode 13) ? Does it work with older version ? If so, may be you should reinstall Xcode.

the max numbers for these version numbers. They are all declared as Int (NSInteger) , so the max should be maxInt. See in doc: Discussion When building 32-bit applications, NSInteger is a 32-bit integer. A 64-bit application treats NSInteger as a 64-bit integer. So you are safe to have 2.51.117 for instance.

Did you try to do a Clean Build folder and recompile ? You may also find interesting help here: h t t p s : / / betterprogramming.pub/info-plist-is-missing-in-xcode-13-heres-how-to-get-it-back-1a7abf3e2514

my label-maker app Is it an app you developed ? says no longer available in the app store have you checked on the appStore if it is present ? Why has it been removed?! For this question you should contact Apple Support (link at the bottom of this page).

What Calculus_area_and_perimeter in ViewController ? Is it an IBOutlet you've defined (looks like, as underscore are Haley used in Swift). If so, check you have properly connected the IBOutlet to the object in IB. The way to correct: check you have connected Calculus_area_and_perimeter to its IBOutlet (a label ?) if not, do it if connected, disconnect ,reconnect do a Clean Build Folder possibly quit and relaunch Xcode. Note: it is not enough to report the error, you should show the code, with all the elements related to the error message. Otherwise we have too much to guess for.

Do you test this code in playground ? I tested in playGround with Xcode 13 and it works without problem. You need to add: import UIKit