Class is implemented in both

[Trygve Inda]

I have a Pref Pane and a Screen Saver module. They both share a common
helper class (MyDisplayManager).

When the pref pane has been loaded and I go into the screen saver (or vis
versa), because the host app is System preferences, I get:

Class MyDisplayManager is implemented in both One of the two will be
used. Which one is undefined.

The class comes from the same source file. What is the best way to handle
this? I could ignore it because the classes are the same (same source file)
so it should not matter which one is used.

Is there a better way without duplicating and renaming the class?

Thoughts?



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[NSXPCConnection] Getting the effective user/group ids of the listener

[Stephane Sudre]

It's possible to retrieve the effective user/group ids of the remote
peer from the listener delegate method.

But it there a way for the remote peer to get the effective user/group
ids of the remote listener?

According to the CREDENTIALS section of the xpc_objects(3) man page,
it seems to be possible but even after a message has been exchanged
the values are still -1 and -1.
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Re: Drag and Drop on iOS

[Uli Kusterer]

On 11 Aug 2016, at 13:49, Graham Cox  wrote:
> I have a small app that works on Mac, and I’m further developing an iOS 
> version of it.
> 
> I’m wondering what the general approach is for dragging an object from one 
> view to another in iOS is. On the Mac version, I simply use the usual drag 
> image+pasteboard approach, but on iOS this appears not to be supported. Both 
> of the views in question are subviews of the same window (obviously, since 
> iOS doesn’t have multiple windows) so that probably simplifies things. Is it 
> just a case of moving a CALayer belonging to a common ancestor view and then 
> doing whatever is needed to communicate between the views when the drag 
> completes? Or is there something in UIKit that handles some of that 
> generically? It wasn’t obvious where to look; I didn’t see anything in UIView.

Nothing specific, no. Useful tools are gesture recognizers (there is one that 
handles both a press-and-hold and the dragging afterwards, I think), turning 
off clipsToBounds on the container view sometimes also can be useful (e.g. for 
drag-out-to-delete). And people seem to generally add a layer shadow to the 
item being dragged, but beyond that you're pretty much back where you were in 
System 6 before the Drag Manager came around.

Cheers,
-- Uli Kusterer
"The Witnesses of TeachText are everywhere..."
http://stacksmith.org





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