Hey, is anyone here using CloudKit? I'm getting started with it and have issues. There's some content on Apple's dev forums, but frankly even the new improved forums have awful UX (why couldn't they

Check Objective-C headers in teh foundation classes. In there, you can see how you can declare a function’s availability to certain OS versions. Once you see how Apple does it in Objective-C, you

Suppose I have a protocol that contains a method with a default implementation: public protocol A { func foo() } public extension A { func foo() {

I have what must be a common problem, and am looking for some architectural suggestions. Over the years, I've built custom objects (e.g., popup calendars, button menus, etc) which have now been

I’m wondering if anyone thinks it’s remotely possible to automatically connect an iOS device to a WiFi network with user permission. Sort of select a network, wait for a network access over

I have a storyboard-based app based on a split-view. I have edited the split view as shown in the attached screenshot. My goal is to have a single storyboard that will handle both iPhone and iPad

OK, I have this problem generally solved. There’s one more thing I’d like to ask though - when a tile draws to the screen, it is animated. In some cases that’s annoying, like when something

Thanks to everyone who chipped in so far — interesting ideas. The zOrder is in fact a float (CGFloat, so 64 bit), but as Jens points out, it can’t go on indefinitely. In experimenting with this,

Does anyone have sample code or just a few hints how to use CATiledLayer in a NSView on Mac? I’m reasonably au fait with using layers in a view in general, but this one is very minimally documented

I have been using the following code to determine if a system is set to 12hr or 24hr time for sometime… NSString *formatStringForHours = [NSDateFormatter dateFormatFromTemplate:@"j"

Sadly, this only postpones the problem — you run out of precision after a while. A 64-bit double only has about 52 bits of mantissa, meaning that some sequences of 52 reorders will cause a

Graham, I am picturing a radix trie with n-bit keys where n is 32 or 64—whichever suits your z-orders. Keys represent the z order. Each object is a leaf in the trie. In each object, store its

Are the zObjects integers? If so would it help to make them floats? Intial value 3.0; Back one 2.9 or 2.09; Forward one 3.1 or 3.01? Or have I not understood your architecture or the memory

Hi all, I Have an interesting little problem, thought I’d throw it out there and see if it stirs up any discussion…. Graphics app, wherein the user can draw stuff - arbitrary vectors on a canvas.

I learned a lot from this thread - thanks!

Jeff, Switch languages!!! Noooo…

Jeff, Couldn’t agree more…There is no need to optimize for performance here… higher level Obj-c interfaces are preferable. Yes, lots of efficiencies can be made. Unfortunately, it’s just not

On review, one thing. Don't do this:if ( [self respondsToSelector:sel] == NO ) It's a boolean method, never use an equality check for "true" or "false" on a boolean method, even if it seems to work,

This capability of Objective-C, to create classes on the fly, is one of the primo reasons why I can't understand people's fascination with Swift. Even C# can do this sort of thing, but people these

Jeff, Works great! See my implementation below… The one thing I wasn’t sure about was the types array argument for class_addMethod() The fourth param… I used ‘i’ to specify the return type