“SwiftData inheritance relationship”

I have an entity A with a many to many relationship events with entity Event. Entity Event has an attribute eventName.I want to be able to fetch all entity As that have a given set of Event entitys that match the entityName selected by the user. For an ANY fetch, a compound OR predicate works fine. But for an ALL fetch (where only entity As that have ALL of the user chosen events will be fetched) the compound AND predicate returns a nil!I was told that I would have to use subqueries. My deliema is that I am having a hard time figuring out how to form a subquery string.The format is as follows...SUBQUERY(collection_expression, variable_expression, predicate);I'll have the eventName string selected by the user so that is dynamic. So what should my subquery look like if I want to use the LIKE[d] operator?the collection_expression would be the relationship events if i am not wrong?kindly help me out with this.thankyou.

Hello,When I attempt to open the Guided Tour playground file mentioned in the pre-release Swift programming book in Xcode 7 on El Capitan (first build), Xcode crashes immediately upon opening. I've been able to use it fine with other projects/playgrounds etc, its just this indiviudal one.I've included a snippet of the crash log - does anyone know of a fix for this?Thanks in advance.Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Application Specific Information: ProductBuildVersion: 7A120f ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDELanguageSupport/IDELanguageSupport-8102.19/IDELanguageSupportUI/Playground/Editor/IDEPlaygroundSourceTextScrollView.m:322 Details: result should be an instance inheriting from IDEPlaygroundTextView, but it is nil Object: <IDEPlaygroundSourceTextScrollView: 0x7f8ffd8cebc0> Method: -_drawGutterAndResultSidebarBackgroun

I'm wondering, is it even possible to create a `Set` in Swift whose members are guaranteed only to share conformance to a Protocol?My initial attempt looked like this:protocol MyProtocol {} var mySet: Set<MyProtocol> = []But that yields the compiler error Type 'MyProtocol' does not conform to protocol 'Hashable'.Next I tried:protocol MyProtocol: Hashable { } var mySet: Set<MyProtocol> = []But now we get the error Protocol 'MyProtocol' can only be used as a generic constraint because it has Self or associated type requirementsClearly we've hit a problem with the Swift distinction between static and dynamic protocols that prevents us from using a Hashable protocol as a type parameter (because Hashable is Equatable, and Equatable for some reason requires that you're trying to equate a class to itself).What if we try adding Hashable compliance to MyProtocol via an extension?protocol MyProtocol {} extension MyProtocol: Hashable {}Extension of protocol 'MyProtocol' cannot have an inheritance cl

Today when I attempted to upload the binary for my app I recieved an Invalid Binary message.Non-public API usage:The app contains or inherits from non-public classes in cbe-mobile: ReachabilityI had been using Reachbility 3.0, but with the error I upgraded to Reachability 3.5 as found at https://developer.apple.com/library/ios/samplecode/Reachability/Introduction/Intro.htmlUpon resubmission the error persists (addiontally the Xcode Validation system does not detect any issues). What private API is being used and how can I change it?

The reason this would happen is because I am thinking of modifying scores before submitting them to Game Center by adding to them scores of the player's friends from the last day.

So, I am fairly new to iOS programming, and have inherited a project from a former coworker. We are building an app that contains a gauge UI. When data comes in, we want to smoothly rotate our layer (which is a needle image) from the current angle to a new target angle. Here is what we have, which worked well with slow data: -(void) MoveNeedleToAngle:(float) target { static float old_Value = 0.0; CABasicAnimation *rotateCurrentPressureTick = [CABasicAnimation animationWithKeyPath:@transform.rotation); [rotateCurrentPressureTick setDelegate:self]; rotateCurrentPressureTick.fromValue = [NSSNumber numberWithFloat:old_value/57.2958]; rotateCurrentPressureTick.removedOnCompletion=NO; rotateCurrentPressureTick.fillMode=kCAFillModeForwards; rotateCurrentPressureTick.toValue=[NSSNumber numberWithFloat:target/57.2958]; rotateCurrentPressureTick.duration=3; // constant 3 second sweep [imageView_Needle.layer addAnimation:rotateCurrentPressureTick forKey:@rotateTick]; old_Value = target; }The problem is we have