Search results | Apple Developer Forums

Reply to startUpdatingLocation Unavailable Watchkit 2

This call fails to compile because it's flagged with __WATCHOS_PROHIBITED. As to why it fails to compile, I'm not up-to-speed on location issues for watchOS but it seems that continuous location tracking is not allowed on the watch itself. WWDC 2015 Session 714 What's New in Core Location discusses this in depth (haven't yet had a chance to watch it myself, alas).Finally, I've moved your thread over to System Frameworks > Maps and Location, where you're more likely to find folks with experience doing this sort of thing.Share and Enjoy — Quinn The Eskimo! Apple Developer Relations, Developer Technical Support, Core OS/Hardware let myEmail = eskimo + 1 + @apple.com

App & System Services Maps & Location

Jul ’15

Reply to unable to call c++ class in objective c

I agree with dgatwood's response except for one minor niggle. They wrote:You also need to use the C++ compiler.What you want is the Objective-C++ compiler.Share and Enjoy — Quinn The Eskimo! Apple Developer Relations, Developer Technical Support, Core OS/Hardware let myEmail = eskimo + 1 + @apple.com

Programming Languages General

Jul ’15

Reply to How to get an UnsafeMultablePointer<mach_port_t> to pass to IOMasterPort?

While it's interesting to see all of this IOMasterPort info fly by, the simplest option by far is to avoid that call and simply using the kIOMasterPortDefault global variable. The following compiles in both Xcode 7b4 and Xcode 6.4:import IOKit IOServiceGetMatchingService(kIOMasterPortDefault, nil)Just by way of history, kIOMasterPortDefault wasn't part of the original Mac OS X 10.10 API, so lots of folks wrote lots of code using IOMasterPort. These days that's not necessary; kIOMasterPortDefault was introduced a long time ago (I checked the Mac OS X 10.2 SDK, and it has it), so there's really no need to call IOMasterPort. Of course, the information in this thread will be handy when calling other I/O Kit APIs.Share and Enjoy — Quinn The Eskimo! Apple Developer Relations, Developer Technical Support, Core OS/Hardware let myEmail = eskimo + 1 + @apple.com

Programming Languages Swift

Jul ’15

Reply to Actual timestamp

ObjectHub wrote:I suggest using CFAbsoluteTimeGetCurrent() …CFAbsoluteTimeGetCurrent is based on gettimeofday and thus will change with the system clock. benrimmington wrote:For real time threads, see Technical Note TN2169 …Mach absolute time may well be the right option here, and all of the APIs you mentioned are based on Mach absolute time.The big gotcha with these APIs is that Mach absolute time stops when the CPU sleeps. @OmniOnline, if you only need to track time while your app is in the foreground, Mach absolute time (or one of its derivatives) is your best option. Otherwise things get more complex and you should post a follow-up with more information about your goals.Share and Enjoy — Quinn The Eskimo! Apple Developer Relations, Developer Technical Support, Core OS/Hardware let myEmail = eskimo + 1 + @apple.com

Programming Languages Swift

Jul ’15

Reply to Background Session Task state persistence

You're interpreting my approach correctly, although I'm not 100% sure what you mean by original request. I presume you're doing that on a mutable request before you pass it to -downloadTaskWithRequest:. If so, that's exactly what I did. Here's my code to set it:request = [[NSMutableURLRequest alloc] initWithURL:download.targetURL]; [NSURLProtocol setProperty:[download.downloadUUID UUIDString] forKey:kDownloadUUIDStrPropertyKey inRequest:request]; result = [self.session downloadTaskWithRequest:request];and here's the Quinn-level-of-paranoia code to get it:downloadUUIDStr = [NSURLProtocol propertyForKey:kDownloadUUIDStrPropertyKey inRequest:task.originalRequest]; if (downloadUUIDStr == nil) { assert(NO); } else if ( ! [downloadUUIDStr isKindOfClass:[NSString class]] ) { assert(NO); } else { downloadUUID = [[NSUUID alloc] initWithUUIDString:downloadUUIDStr]; if (downloadUUID == nil) { assert(NO); } else { ... } }where:download is an object I use to track the downloadkDownloadUUIDStrPropertyKey is my custom keyTh

App & System Services Core OS

Jul ’15

Reply to With Split View, how can I talk to the parent app from its extension?

It would be nice if NSUserDefaults took care of this for you; it even has a handy-dandy notification (NSUserDefaultsDidChangeNotification) that it could post in this case. Alas, that support wasn't wired up for the shared container case, at least when I last tried it on iOS 8.x. You should re-test on iOS 9 beta to see if things have improved. If not, something like MMWormhole is your best way forward. And if you are forced down that path, please file a bug requesting better system-level support, and then post the bug number here just for the record.Share and Enjoy — Quinn The Eskimo! Apple Developer Relations, Developer Technical Support, Core OS/Hardware let myEmail = eskimo + 1 + @apple.com

App & System Services Core OS

Jul ’15

Reply to nsmanagedobjectcontext don't save certain url file

First up, I moved your question to Core OS > Networking because it seems more about networking than about Swift.Second, I'm having a hard time understanding your actual question. At first blush it seems like you're simply trying to test URLs for equality, that is, you're trying to see if request.URL matches some fixed URL. Is that right? If so, == should work. Swift translates it to -[NSURL isEqual:]. For example: import Foundation let u1 = NSURL(string: http://foo.example.com)! let u2 = NSURL(string: http://bar.example.com)! let u3 = NSURL(string: http://foo.example.com)! println(u1 == u2) // prints false println(u1 == u3) // prints true println(u1 === u3) // prints falseNote that u1 and u3 are not the same object, so === returns false: [I tested this with Xcode 6.4 on OS X 10.10.4, although I expect it'd be the same for Swift 2.]println(u1 === u3) // prints falseIMPORTANT URL equality is more complex than you might think. Consider the following:let uR = NSURL(string: http://example.com) let uR1 = NSURL(s