// Inside root view controller - (void) play_test_video { g_video_test = [AVPlayer playerWithURL : file_url]; g_video_controller = [[AVPlayerViewController alloc] init]; ...

I want to show progress in collection view cell text label. I use this code to do it. Code from observer works and I see print progress in debug but I can't see this in cell. Why? KVO variant (not ...

I have a UI object (a subclass of NSObject called Label) that observes a property called region (subclass of NSManagedObject called Region) for three core data attributes: start (float) end (float) ...

I am trying to replace old fashioned Objective-C way of observation to modern swift way of observation. However I cannot figure out the keypath. //doesn't work progress.observe(\.userInfo[...

I have an NSTableView bound to an NSArrayController, and have registered an observer for whenever data changes to the data fields that the array controller manages. For example, here's a few of the ...

The .loadTransferable method returns a progress object (https://developer.apple.com/documentation/photokit/photospickeritem/4030160-loadtransferable) It seems the progress class returned from the ...

I am loading a video from the user's photo library. I want to track the progress of loadTransferable to update a progress view. However, I am having a ton of trouble observing the key values. I have ...

Got few crash reports from macOS 14.0. After digging deep I found that issue is related to keypath bindings(NSDisplayPatternValueBinding) with NSObjectController and NSTextView. I bind NSTextView to ...

import spark.implicits._ import org.apache.spark.sql.column def reverseMap(colName:Column) = map_from_arrays(map_values(colName),map_keys(colName)) val testDF = Seq(("cat",Map("black&...

Using Xcode 12, and starting with the default XIB-based swift desktop app, I add a Model class, descended from NSObject with a single stringValue property. In the XIB file I instantiate the Model ...

Most of the permission requests on iOS these days have an API with a callback for when the user answers the request alert. Is it possible to get a similar effect for the Bluetooth permission request? ...

Why does the following LoginDateMonitorView result in hundreds of messages in the debugger? 2022-10-13 06:31:03.959864+0100 Test[4412:126282] [SwiftUI] Publishing changes from within view updates is ...

My application uses the microphone's permission, which is requested in another framework, and in the main application, I wasn't able to observe when microphone permission changed. I tried using KVO's ...

I have a UIViewController with the following code. I want to know when the value of portrait effect is changed (in control center). I have tried AVCaptureDevice.isPortraitEffectEnabled and ....

I've just started learning Combine and am quite confused with behaviour of KVO publishers. They just do not publish any events except for the initial value. Here is the sample code I used: @objc class ...