When you say replacing with something new created with the latest Xcode, are u saying to create a new xib from scratch and build the views to mimic the previous xib? if this is the case , no I haven't tried that yet .  Better try it as soon as possible. You have no need to mimic the previous xib, just need enough definitions to test if it causes the same crash or not.

Okay so I have to modify my get request then. Maybe.

 I created a file named MapViewController.swift it still starts the ContentView.swift Seems you created two different types of codes, UIKit and SwiftUI. Are you using MKMapView in MapViewController? Is MapViewController a subclass of UIViewController? In SwiftUI, you usually use Map, do you have any View (not UIViewController) using Map? You should better show your code.

Not sure, but sounds like some cell-reusing issue. Can you show your code implementing UICollectionViewDataSource methods and the definition of the cell class?

Can you show enough code and clarify what you want to do? What are model.data and date.data? Are they Arrays of the same length? Or something else?

Can you show your code causing the error?

What's configfilename?

configfilename = 'geo-esp-train.cfg' I do not have experience about writing apps in Python, but isn't that pointing some place where app cannot touch?

Not sure what do you mean by the "definition of the cell class"? In your case, the definition of SearchTweetsCell.

In Android the OS automatically allocates a default folder for the app, where the file is automatically created. So I presumed that iOS works in a similar way? It depends on the framework you are using.

Does that mean that this error is the result of the error I reported in another question, that has not yet been answered? Not sure, but it may be a bug of the framework you are using. Better visit the supporting site of it, I believe it is not a framework of Apple's.

You expect self.view as an MTKView, but it actually is a plain NSView and that is causing the issue. How have you set up the storyboard (or nib) of the view controller?

I don't believe there is anything wrong with the code but Xcode. I do believe there is something wrong with your code. Why have you changed line 23 and 24 from the original code? x: width * segment.line.x + xOffset, y: height * segment.line.y If you want to modify some points, all other points needs to be modified consistently. Only modifying this part is making your shape broken.

What settings can cause the black launch screen in this scenario? iOS cannot show some types of images. Have you checked if The png is fine for iOS? (Sorry, but I do not understand what you mean by I can point Main.storyboard.)

My Main.storyboard has a png background that works. When I change it to instead use the desired Launch Screen.png it also works, proving that the Launch Screen.png is good to use. Can you clarify how many images do you use? a png background in Main.storyboard, Launch Screen.png and IMG_1486.png? Without precise description of what you have done, readers cannot find what's wrong.