Re: Modifying Set via NSArrayController breaks Set in weird way
Re: Modifying Set via NSArrayController breaks Set in weird way
- Subject: Re: Modifying Set via NSArrayController breaks Set in weird way
- From: Etan Kissling <email@hidden>
- Date: Fri, 08 Jan 2016 18:03:57 +0000
- Thread-topic: Modifying Set via NSArrayController breaks Set in weird way
dynamic var foos: NSMutableSet = [Foo(x: 0), Foo(x: 1), Foo(x: 2)]
(lldb) e/x foos as! Set<Foo>
Comparing 2 to 0
Comparing 1 to 0
(Set<SetCompare.Foo>) $R0 = ([0] = <Execution was interrupted, reason: Attempted to dereference an invalid ObjC Object or send it an unrecognized selector.
The process has been returned to the state before expression evaluation.>, [1] = <Execution was interrupted, reason: Attempted to dereference an invalid ObjC Object or send it an unrecognized selector.
The process has been returned to the state before expression evaluation.>, [2] = <Execution was interrupted, reason: Attempted to dereference an invalid ObjC Object or send it an unrecognized selector.
The process has been returned to the state before expression evaluation.>)
On 08 Jan 2016, at 19:00, Etan Kissling <email@hidden<mailto:email@hidden>> wrote:
In fact, it makes things even worse, and freezes up Xcode when expanding the set in the debugger.
On 08 Jan 2016, at 18:59, Etan Kissling <email@hidden<mailto:email@hidden>> wrote:
As the comments in the sample project describe in the introductory comments,
modifying the code to force an NSSet does not solve the problem.
On 08 Jan 2016, at 18:39, Quincey Morris <email@hidden<mailto:email@hidden>> wrote:
On Jan 8, 2016, at 07:14 , Etan Kissling <email@hidden<mailto:email@hidden>> wrote:
In my ViewController, there is a NSSet-based collection of such objects.
final class ViewController: NSViewController {
dynamic var foos: Set<Foo> = [Foo(x: 0), Foo(x: 1), Foo(x: 2)]
}
I don’t think it’s true that ‘foos’ is a NSSet. Rather, it’s a Swift Set that can be bridged to/from a NSSet, and it’s not clear (from any documentation I’ve read) that automatic bridging is going to occur when it’s accessed from a NSArrayController.
It may be necessary to declare ‘foos’ as a NSSet explicitly in this case.
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