I have an annoying problem with Xcode 14.2. After opening a project, Quick Help pane works normally. But once a debugging session ends, it stops working (showing nothing). Meanwhile ALT+CLICK won't work either (no response). After closing and re-opening the project Quick Help works again. Is there any workaround for this nuiance? I already went back to 13.14.1.

I cannot find any docs on this image name but I can select it from the dropdown list in IB. What is the mim macOS version for this name?

This is the first time I use KVO pattern. The code is quite simple but I could not get it working - the log method never gets run. What's wrong with my code? @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; [self.view.window addObserver:self forKeyPath:@"firstResponder" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:nil]; } - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context { NSLog(@"%@", change); } @end

I think I can do this by creating a custom view overriding the following 2 methods: @implementation MyTextField - (BOOL)becomeFirstResponder { NSLog(@"%s: %@", __func__, self); return [super becomeFirstResponder]; //return YES; } - (BOOL)resignFirstResponder { NSLog(@"%s: %@", __func__, self); return [super resignFirstResponder]; //return YES; } @end But there is a gotcha - I always get successive become/resign. That is when I get becomeFirstResponder, I also get resignFirstResponder immediately. Note - I only have one MyTextField instance on my window. Is there another safe way to achieve my goal?

I really like to implement an overlay that is similar with what we have in NSDatePicker: I know most of the time, we just use what Apple gives us behind the curtain, but I really want to know if this even possible. Thanks!

I am currently using Xcode 14.2 (14C18), but it has some glitches (which I don't want to enumerate here). I now want to revert back to an earlier older version. Any suggestions?

I want to add "Show in Finder" in my app that is similar to the one in Xcode. How do I do this using objc?

In IB I connect a button to a VC and set the segue kind to 'Popover'. Now I have a problem. How do I get the NSPopover and its delegate? -(void)prepareForSegue:(NSStoryboardSegue *)segue sender:(id)sender {     NSLog(@"%s: %@", __func__, segue.destinationController);     NSViewController* vc = segue.destinationController; }

I am aware of the following approach: Add a custom view into a view in IB. Set the class of this custom view, say "MyDatePickerView". Now my datepicker view has a moderate complex UI, and I want to isolate its functionalities into a standalone XIB. Is it possible to do this in IB (I know I can do it in code)?

Got confused about these 2 methods. NSObject protocol has an isEqual: method. NSObject implements NSObject protocol but it does not have isEqual:, instead it has an isEqualTo: method. What's the magic behind the design? Or is the doc wrong? Should I implement both methods in a derived class?

I did searches on the Internet but could not find a definitive answer. The best thing I get is CGImageSourceCreateThumbnailAtIndex API function. But I don't know how create CGImageSource out of an NSImage object. Thanks for any suggestions.

I have a custom view that acts as a container for many NSImageViews that will be created dynamically on the fly. When the container view is resized (by parent window), some new subviews may be created and added to the container view, or some subviews may be removed because they are not fit into a smaller view. I have two ways to handle the 'disappearing' subviews. One way is to hide them, the other is to remove them from the container view. My concern is that - Is there a (big) performance difference between the two methods? Which is better?

I have a need to tell if 2 images are different by unimportant details. For example, one image is only slightly different than another because: *) It is a little stretched *) or it has 99% portion of another (only missing some pixels on borders) I wonder if there is an efficient algorithm to achieve my goal. Any suggestions are welcome.

When I log in and start a Terminal window, a simple gcc command produces the following debug messages: 2022-07-15 13:52:41.470 xcodebuild[784:10833] Requested but did not find extension point with identifier Xcode.IDEKit.ExtensionSentinelHostApplications for extension Xcode.DebuggerFoundation.AppExtensionHosts.watchOS of plug-in com.apple.dt.IDEWatchSupportCore 2022-07-15 13:52:41.470 xcodebuild[784:10833] Requested but did not find extension point with identifier Xcode.IDEKit.ExtensionPointIdentifierToBundleIdentifier for extension Xcode.DebuggerFoundation.AppExtensionToBundleIdentifierMap.watchOS of plug-in com.apple.dt.IDEWatchSupportCore Subsequent invoke of gcc does not produce these messages. How to avoid this small nuisance?

I once enabled locate (not location) service but now I want to disable/remove it. It's really not very helpful compared to spotlight. What is the correct commandline?