“SwiftData inheritance relationship”

I'm looking into how to package an Audio Unit consisting of several other audio units. I came up with the following solution, calling the AUAudioUnit render function explicitly from the AUInternalRenderBlock. But the audio unit doesn't seem to run, since mData inside outputData remains uninitialized after the render function has been triggered.Any suggestions?From myAudioUnit.m inheriting from AUAudioUnit:- (AUInternalRenderBlock)internalRenderBlock { return ^AUAudioUnitStatus(AudioUnitRenderActionFlags *actionFlags, const AudioTimeStamp *timestamp, AVAudioFrameCount frameCount, NSInteger outputBusNumber, AudioBufferList *outputData, const AURenderEvent *realtimeEventListHead, AURenderPullInputBlock pullInputBlock) { [_eqAudioUnit.audioUnit renderBlock](actionFlags, timestamp, frameCount, outputBusNumber, outputData, pullInputBlock); return noErr; }; }_eqAudioUnit is an instance of EQAudioUnit (ensuring that allocateRenderResources is invoked before triggering the renderBlock):public class EQAudioUni

So, I have a subclass of NSTableView. I extend NSTableViewDelegate. My interface looks something like this:@protocol MyTableViewDelegate; @interface MyTableView : NSTableView @property (nullable,weak) id <MyTableViewDelegate> delegate; @end @protocol MyTableViewDelegate <NSTableViewDelegate> //Added methods here... @endNow this always would warn, but not if you used @dynamic to acknowledge intent:@implementation MyTableView @dynamic delegate; @endBut now the warning is always present in Xcode 8

This is on an iPhone6 running iOS10 compiled with XCode 8 in Swift 3 codebase (the only configuration tested so far).My app presents a UIImagePickerController modally, in camera mode. After user takes a picture and taps Use Photo, I push a custom image cropping view controller onto the picker (since it inherits from UINavigationViewController). This works fine, but if the user then pops back to the camera view, the camera UI is completely frozen. It still displays the last (static) image and the Retake and Use Photo buttons, but the UI is dead.The only configuration to the default camera is `showCameraControls` is true.Is this a bug, or do I need to restart the camera UI somehow? I'd really prefer not to dismiss the modal just to present the cropper (possibly reversing this if they want to go back), as the push transition is really the right convention here. I've seen posts to the effect that dismissing the camera and opening a new modal tends to work and that the camera only works once but this seem

I'm experiencing a weird behaviour with NSFetchedResultsController. It is new in iOS 10. Straight to the point: `fetchedObjects` contains duplicate objects.This is not by any mean duplicate in my own criteria. They literally have the same objectIDs and the same reference.How does it happen in my app:FRC is setup and fetch performed2 objects are fetched (in this example)Something happens in my sync layer, another object (that fetch items are in relationship with) is updatedFRC calls delegate that the content did change. `fetchedObjects` contains 4 objects (2 duplicates)Here's a console output from my debugging in `controllerDidChangeContent` method. po frc.fetchedObjects - 0 : <ListItem: 0x1700dc3f0> (entity: ListItem; id: 0x1706294a0 <x-coredata://12D0CB00-7BF4-402A-8371-19DD1CFB1537/ListItem/t3384FC2D-3399-41FE-B7DD-C277922F495445> ; data: { ... } - 1 : <ListItem: 0x1700dc3f0> (entity: ListItem; id: 0x1706294a0 <x-coredata://12D0CB00-7BF4-402A-8371-19DD1CFB1537/ListItem/t3384FC2

I have implemented ReplayKit in my SpriteKit game, but since everything is done within the GameViewController the record button appears too early. Please see my GameViewControllerclass below:class GameViewController: UIViewController, RPPreviewViewControllerDelegate{ var videoRecButton: UIButton! var videoRecImage: UIImage! override func viewDidLoad() { super.viewDidLoad() let skView = self.view as? SKView if skView?.scene == nil { skView?.showsFPS = true skView?.showsNodeCount = true skView?.showsPhysics = true skView?.ignoresSiblingOrder = false let posterScene = PosterScene(size: skView!.bounds.size) posterScene.scaleMode = .aspectFill skView?.presentScene(posterScene) } videoRecButton = UIButton(type: .custom) videoRecImage = UIImage(named:videoRecButton.png) videoRecButton.frame = CGRect(x:0, y: 0, width: (videoRecImage?.size.width)!, height: (videoRecImage?.size.height)!) videoRecButton.setImage(videoRecImage, for: .normal) videoRecButton.addTarget(self, action:#selector(self.videoRecButtonClicked), for

Notification Center in Sierra has a new, light background colour compared with Yosemite and El Cap. My widget, however, still shows the old, dark style, even when I rebuild with the new SDK.The view has appearance set to Inherited (Vibrant Dark). Changing that to Aqua seems to have no effect.Is it possible to change third party widgets to look the same as Apple's? I notice all the other third party widgets I look the same. Thanks,Stephen

HiI know a convenience intializer should eventually call a designated initilizer in the same class. But is there a way to use superclass's convenience initilizer in a subclass? I inherited a subclass from class XMLParser, which is a foundation class, I do not know how to override/custom the superclass's initilizer.