“SwiftData inheritance relationship”

CoreBluetooth has refactored both their CBCentralManager and CBPeripheralManager to inherit from CBManager.In this new class, the CBManagerState enumeration exists. This is kind of a big change.What is the best strategy for supporting both CBManagerState along side with CBCentralManagerState and CBPeripheralManagerState enums?This code begins to look quite messy. I don't know of a way to check enum availability, so I check the class that this new property is used in instead.- (void)centralManagerDidUpdateState:(CBCentralManager *)central { if ([CBManager class]) { self.updatedStateBlock((CBManagerState)central.state); } else { self.updatedStateBlock((CBCentralManagerState)central.state); } }Previously my updatedStateBlock was defined as such, but now the named ns_enumeration has changed its name.@property (nonatomic, copy) void (^updatedStateBlock)(CBCentralManagerState state);I could possibly refactor my framework API to pass the manager instead, and then the caller would have to query the state pro

Since tvOS 9.2, the addCoordinatedAnimations(-:completion:) method of UIFocusAnimationCoordinator has exhibited a strange behavior. Assume you have a collection view whose cells use either affine or 3D scale transforms to scale-up their contents when focused:override func didUpdateFocusInContext(context: UIFocusUpdateContext, withAnimationCoordinator coordinator: UIFocusAnimationCoordinator) { coordinator.addCoordinatedAnimations({ if self.focused { self.focusEffectsContainer.transform = CGAffineTransformMakeScale(1.158, 1.158) } else { self.focusEffectsContainer.transform = CGAffineTransformIdentity } }, completion: nil) }If you scroll through the collection view very quickly, cells that acquire and then immediately lose focus before being scrolled into the visible boundswill appear to be scaled-down for a few moments before returning to their identity transform states.Check out a video of the bug here. You can also download the sample project here.My best guess is that UIFocusAnimationCoordinator’s addCoord

I have inherited a mac book os 10.6.8. Is there any place still I can download xcode 4.2 for snow leopard so I can use the machine for building apps?I have not found anything in my own google searches.Thanks.

I need help, I'm starting to use CoreData and I have some doubts about the relationship:I have two entities, Categories and Items:Category entity has the attributes: nameItems entity has the attributes: name, price, and category (entity attribute name Category)How do I insert the record in enteidade Items using the entity's name atribuito Category?

Hi AllI have a question on the most efficient implementation of coredata NSFetchedRestultsController. Basically, I have 2 UITableViewControllers. UITableViewController No 1 shows a list of Parent entities and UITableViewController No 2 shows list of child entities for each parent. (Parent has one-to-Many relationship to child).There is an Add button on the navigation bar to Add a new Parent or a New Child (to a particular parent) on each UITableviewController respectively.The way I have implemented it currently is that both UITableViewControllers have FetchedResultsController methods implemented. So the Parent UITableviewcontroller has a FetchedResultsController to get a list of all parents and also the controller helps to add/remove New Parent entities along with the smooth animations which are default to master-detail style implementation.For the child UITableviewcontroller, there is an analogus FetchedResultsController with a predicate to fetch the children of a particular parent. Rest everything

In Swift 1.x and 2.x on my model I've had property which is a relationship, and isProperty which is a boolean. In Swift 3 I am getting a: Setter for 'property' with Objectice-C selector 'SetProperty:' conflicts with setter for 'isProperty' with the same Objectice-C selector. But I don't quite understand how.

When I try to override the function viewDidUnload method for a class which inherits from UIViewController and MPMediaPickerControllerDelegate, I get an error which says, Cannot override 'viewDidUnload' which has been marked unavailable.What do I do to fix this?

In Xcode 7.3.1 I perform this straigtfoward use-case resulting in crash (see below). The objective of this exercise is to add an additional tab (and view controller) to the tab controller.1) Create New Project OSx Cocoa swift project2) Open story board (by double-clicking storyboard)3) Add Tab View Controller to canvas4) Add View Controller to canvas5) Control-drag from (3) to (4)6) In resulting 'Relationship Segue' pop-up menu choose 'tab items'7) Xcode crashes. ------------------------------------------------Exception Type: EXC_CRASH (SIGABRT)Exception Codes: 0x0000000000000000, 0x0000000000000000Exception Note: EXC_CORPSE_NOTIFYApplication Specific Information:ProductBuildVersion: 7D1014UNCAUGHT EXCEPTION (NSRangeException): *** -[__NSArrayI objectAtIndex:]: index 3 beyond bounds [0 .. 2]UserInfo: (null)Hints: 0: Creation Backtrace for Notification Token: 0 -[_DVTNotificationReceiver initWithBlock:queue:] (in DVTFoundation) 1 -[NSNotificationCenter(DVTNSNotificationCenterAdditions) dvt_addObserver

I've been workin on an app. It uses Core Data allowing the user to create and group a list of records (like many Core Data apps). It's a Mac app.So I'm thinking of adding iCloud support (using the CloudKit API) and syncing data from iCloud with Core Data. I'm on the fence about how I should design my code to handle users who do not opt in to using iCloud and users who may opt in and change their mind and turn the setting off. As a user, I prefer having both iCloud and local areas in the UI, so if I opt into iCloud I don't have to place every single entry in iCloud because 1) it's not free and 2) often I don't need to or want to put something in iCloud.If I remember correctly, the last time I checked out the iCloud design guidelines devs were discouraged from providing both local and cloud options at the same time (I believe we are/were encouraged in offering all or nothing...use iCloud or don't use it). However, Apple does not do this in Notes,...you can add a local note On my Mac in the sidebar even with iCl

I am working with the MediaPlayer library. I want to know how to control the volume with code. I found the MPVolumeView class reference, but I don't know what to do with the class. Is that something I inherit by a subclass?