Hi, I used this notification in objective-c with success : { NSNotificationCenter * center = [NSNotificationCenter defaultCenter]; [center addObserver:self selector:@selector(rowSelectionDidChange:) name:NSTableViewSelectionDidChangeNotification object:nil]; // ... } With Swift I got 5 errors: selector: #selector: ( NSTableView.rowSelectionDidChange(_:)), name:"NSTableViewSelectionDidChangeNotification", object: nil) I hope you can teach me. Uwe

I tried to read an Object : -(NSMutableDictionary*) readMyObject:(NSData*)data; { NSError * error; Class class = [NSMutableDictionary class]; NSMutableDictionary * dict; dict = [NSKeyedUnarchiver unarchivedObjectOfClass:class fromData:data error:&error]; return dict; the result was nil. I searched by Developer for a solution and found one : { // NSKeyedUnarchiver * unarchiver = [[NSKeyedUnarchiver alloc] init]; [unarchiver decodeObjectOfClasses: [[NSSet alloc]initWithArray: @[[NSDictionary class], [NSMutableDictionary class], [NSArray class], [NSMutableArray class], [NSString class], [NSNumber class]]] forKey:NSKeyedArchiveRootObjectKey]; [unarchiver finishDecoding]; } The first line was from me and it crashed the project. I assume there is an easy answer, not for me.🥲 Uwe

Hi altogether, I'm not a professional developer, I work k on projects for me and my children. If I do not set a breakpoint the project behaves normal. This issue appears in all projects, even in examples that I downloaded ("Metal by Tutorials", "Hacking with macOS"). It appears anywhere, whatever method I choose. I created a new project and got the warning: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.16, but the range of supported deployment target versions is 10.6 to 10.15.99. The project breaked. After I set the target to 10.15 it breaked too: obj-C DebugTest`-[AppDelegate applicationDidFinishLaunching:]:     0x1000029e0 +0:   pushq  %rbp     0x1000029e1 +1:   movq   %rsp, %rbp     0x1000029e4 +4:   subq   $0x20, %rsp     0x1000029e8 +8:   movq   %rdi, -0x8(%rbp)     0x1000029ec +12:  movq   %rsi, -0x10(%rbp)     0x1000029f0 +16:  movq   $0x0, -0x18(%rbp)     0x1000029f8 +24:  leaq   -0x18(%rbp), %rax     0x1000029fc +28:  movq   %rax, %rdi     0x1000029ff +31:  movq   %rdx, %rsi     0x100002a02 +34:  callq  0x100008c3a               ; symbol stub for: objc_storeStrong   0x100002a07 +39:  movq   0xbcf2(%rip), %rax        ; (void *)0x000000010000eaa8: AppDelegate Please help, I cannot code without debugging. Uwe  

Hi, in other words: When is time for versioning ? After saving Xcode or saving or build the project ? Or is there a time frame ?😊 Uwe

Hi, obj-c (void)viewDidLoad {     [super viewDidLoad];     _view = (MTKView *)self.view;     _view.device = MTLCreateSystemDefaultDevice(); // - Error . . . } with Xcode 9.3 it runs normal with 12.4 I get the note:  Failed to set (contentViewController) user defined inspected property on (NSWindow): -[NSView setDevice:]: unrecognized selector sent to... Mit freundlichen Grüßen Uwe

Hi, in my first project (learning) i created a class and it works fine. In the second I set an error, i should code "override class", although there is no parent class. Please, make me stop crying. Uwe

Hi, with my new iMac I want to continue learning swift, I was told that the playground is a good tool and I trust. I got the Xcode/New/Playground file and wrote some code - see it : ```import Cocoa var greeting = "Hello, playground" for i in 1...10{ print (i) } The same code runs on Xcode 9.2 (9C40b) I can't help myself 🥲 Uwe Edit: I downloaded Michael Kofler's Swift 5 examples and they even did not run

Hello, here is the block where arrayController is nil : { NSData * data; NSError * error; Class klass; if(_arrayController != nil) // nil ! { selected = [_arrayController selectedObjects]; arranged = [_arrayController arrangedObjects]; if([selected count] > 0) { _currentObject = [selected objectAtIndex:0]; if(_currentObject != nil) { data = [_currentObject valueForKey:kVrRoot]; klass = [NSMutableDictionary class]; _vrRoot = [NSKeyedUnarchiver unarchivedObjectOfClass:klass fromData:data error:&error]; }else { _vrRoot = [NSMutableDictionary new]; data = [NSKeyedArchiver archivedDataWithRootObject:_vrRoot requiringSecureCoding:YES error:&error]; } } } } I use this for years so I don't no what's wrong.

Guten Tag, my project is simple, first I want draw wired Hexa,-Tetra- and Octahedrons. I draw a cube with Metal but I didn't found rotation, translation and scale. I have searched help , the examples I found are too complicated for me. Mit freundlichen Grüßen VanceRegnet

This is not an error or warning, it appears in the console as a configuration error. it's behind my horizon, maybe someone can tell. Uwe

Hi, I have no idea what happened, I got no warnings, no error. When I used the Sandbox I got a GL_INVALID_VALUE  error. Please have I look at the attachments for illustration.

Hi, I have different displayLists (dL) to create, 8 lists have a own name, the work fine. Then I have a dynamic structure of dLs, they are stored in c-arrays. After i noticed that they are not shown, I made 2 dLs which differ in color and vertices. drawRect: glCallLists(2,GL_UNSIGNED_INT, test); This is my list-array: if(contentState[0] == 1) {       glCallLists(contentCount,GL_FLOAT, curveList);   } contentCount = 8 and the declaration is GLfloat curveList[20]  curveList has 8 display indices. I hope I made a mistake and you find it :) Uwe

Hello, I'm working on a small project to draw Lyapunov-Diagrams. For this matter I need to show 3 images. To show that the code is not totally wrong, I attached a NSLog, witch shows text I do not understand. I hope you can help me. Mit freundlichen Grüßen Uwe NSLog

Hi , I got this quote with 5800 repetitions (5.8 MB / 1k) : `2023-05-25 01:02:59.021733+0200 LookAt[6404:302136] [general] *** -[NSKeyedUnarchiver validateAllowedClass:forKey:] allowed unarchiving safe plist type ''NSNumber' (0x7ff84cfe02f8) [/System/Library/Frameworks/Foundation.framework]' for key 'NS.objects', even though it was not explicitly included in the client allowed classes set: '{( "'NSMutableDictionary' (0x7ff84cfb6b48) [/System/Library/Frameworks/CoreFoundation.framework]", "'NSArray' (0x7ff84cfb68a0) [/System/Library/Frameworks/CoreFoundation.framework]" )}'. This will be disallowed in the future ` -(IBAction)readFile:(id)sender { NSData * data; NSError * error = nil; data = [_vrReadWrite readData:kFileComponentA]; NSSet * set = [_vrReadWrite setOfClasses]; _vrRoot = [NSKeyedUnarchiver unarchivedObjectOfClasses:set fromData:data error:&error]; }``` I got the expected result, that's fine, but I'm not interested in this future. Uwe

Hello, Metal is a hard biscuit. the first part of my project is to draw wired platonic solids, I replaced the triangle with a cube which I want to rotate with two sliders. But I don't no how, the MTKView is the view of the viewController, the sliders will rotate too, or not ? Would you developers use the XIP ?