Iterating Over an Nsorderedset

Iterating over an NSOrderedSet

You can iterate over an ordered set with

let orderedSet = NSOrderedSet(array: [ 42, 43, 44])
orderedSet.enumerateObjectsUsingBlock { (elem, idx, stop) -> Void in
    println("\(idx): \(elem)")
}

UPDATE: As of Swift 1.2 (Xcode 6.3), NSOrderedSet conforms to
SequenceType and can be enumerated with for ... in ...:

let orderedSet = NSOrderedSet(array: [ 42, 43, 44])
for elem in orderedSet {
    println(elem)
}

NSOrderedSet and SwiftUI ForEach

The following should help you

 ForEach(Array(currentDog.walks!.set),id: \.self) { walk in
                Text("Date \(self.walkDate(walk))")
            }

How to ForEach in SwiftUI a NSOrderedSet from FetchedResults (CoreData)

The highlighted error is because there is no view specified in ForEach, so if to define something static, like

ForEach(Array(card.withChilds!.set), id: \.self) { child in 
        Text("Just test")
    }   

there should be no error (tested with Xcode 11.4)

But there is no specified what is inside that NSOrderedSet, so if suppose it is instances of Child class then the following tested works

ForEach(Array(card.withChilds!.set), id: \.self) { child in 
        Text("someText: \((child as! Child).text1)")
    }   

Iterate NSSet and cast to type in one step

You can use pattern matching case let in a for loop:

for case let animal as Animal in zoo  {
    if animal.needFeeding {

    }
}

Note that this will just skip elements which are not instances of
(a subclass of) Animal.

Iterate over a NSSet - SwiftUI 2.0

Try the following (compiled with Xcode 12.1 / iOS 14.1)

ForEach(Array(team.people as? Set<Player> ?? []), id: \.self){ player in
    Text("\(player.name ?? "")" )
}

Caution: try to avoid force unwrapping for optionals, very often it will result in run-time crash.

Iterate through NSManagedObject in order

A to-many relationship is represented as an NSSet when using valueForKey:.

To turn that into a sorted NSArray, you can use the sortedArrayUsingDescriptors: method:

NSSet *allFields = [table valueForKey:@"fields"];
NSSortDescriptor *indexSortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"index" ascending:YES];
NSArray *sortedFields = [allFields sortedArrayUsingDescriptors:@[indexSortDescriptor]];

Find object in NSOrderedSet in CoreData. index(ofAccessibilityElement :)

Autocompletion can and often is wrong. It can be handy but it's not a reference for what's correct.

I don't know what you mean about the compiler wanting to use that method, because it's not what you need to look up objects in an ordered set. The correct method would be index(of:), as in

var myset = NSMutableOrderedSet(array: [1, 2, 3])

myset.index(of:2)

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