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Swift 2: Catching NSException
I'm working with an Objective-C library that throws NSExceptions for certain conditions (network or service unavailable).Swift 2 will catch anything that is of type ErrorType, which NSException is not, so I've extended it to be of ErrorType:extension NSException : ErrorType { public var _domain: String { return some.domain } public var _code: Int { return 0 } }I'm running the following code:do { print(Pinging service) let response = try service.ping() print(Ping respones: (response)) } catch { print(Encountered error: (error)) }It crashes during the ping()Any idaes?
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7.1k
Jun ’15
Reply to Debug SIGTERM handler in Xcode?
Ken,Thanks a million! That did the trick nicely. For future reference, the lldb command to change how the debugger handles a specific signal isprocess handle <SIGNALNAME> [ --pass <true|false|1|0> ] [ --stop <true|false|1|0> ] [ --notify <true|false|1|0> ]--pass determines if the signal will be passed to the process' signal handler--stop determines if the debugger will stop your process when a signal is received--notify controls whether a message about the signal gets loggedIn my case, the solution was: process handle SIGTERM --stop false --pass true
Jun ’15
Reply to WatchOS beta 2 battery life
I'm in the same boat. It seems that there are quite a few crashes in the OS beta which is understandable. Every once in a while I look down and I see the Apple logo screen like as if it were turning on. Hopefully in the next few weeks the betas will be able to solve those problems and give us all day battery life again. I guess thats what we get for wanting to develop for the watchOS 2 😝
Topic: App & System Services SubTopic: Core OS Tags:
Jun ’15
Crash Reports for older app versions
I have previously used third party tools to gather crash reports, but decided to do some research into what has changed in the crash logging tools that Apple provides us with.Reading the description, I came across the following sentance: Apple provides a service that allows you to download crash reports for the most recent app versions and builds that you distribute using TestFlight or the App Store.I was hoping I could get clarification that indeed we only are supplied with crash reports for the current version of a given app, and are unable to get crash reports for older versions of an app. I'm hoping to be able to know if an old version of an app has started crashing, so this would be a large limitation for my needs.
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877
Jun ’15
Reply to App Store not updating / downloading apps
I'm having this exact issue on beta 2. Apps fail to update. Trying to Update All or Update each app individually leads to the App Store prompting me for my password. I enter it and it asks for it again and again. If I navigate to the homescreen, there is a blue dot next to the specific apps (indicating they're updated), but when I tap to launch it, the app will immediately crash. Restarting my iPhone allows for me to use the older version of the app again.However, the only way I can update apps right now is uninstalling the app and reinstalling the latest version from the App Store. Will try to make a report of this ASAP! :-)
Topic: App & System Services SubTopic: Core OS Tags:
Jun ’15
Reply to Swift 2: Catching NSException
You make a reasonable point, but I think there is value in making a distinction because there is already an exception handling mechanism in our (Xcode) ecosystem, perhaps two, if you count the Obj-C and C++ exception mechanisms separately, and Swift is unaware of both of them.I think there are three key differences between Swift error handling and exceptions in the other languages:1. In Swift, 'throw' is a transfer of control to the calling function, similar a 'return'. Elsewhere, it's a transfer of control to somewhere else in the stack.2. In the other languages, a function that isn't exception-aware can have a transfer of control across it (from below it to above it). In Swift, a non-exception-aware function blocks any error handling control transfer.3. Swift has no system (program failure) exceptions, such as invalid argument or nil pointer that are fed into the error handling mechanism. Those sorts of failures immediately and correctly cause a crash. Actual errors appear only by API contract betw
Topic: Programming Languages SubTopic: Swift Tags:
Jun ’15
Reply to Is there anyway to programmatically generate a force click?
It sounds like you're misunderstanding There's no documented API for that for not possible.The nice people from Apple won't tell you about API that aren't documented, and your fellow developers all get to write We told you so when your application uses an undocumented API that breaks, stops working, or randomly crashes your application.After all, there's probably at least one method involving a kernel debugger that would let you generate any event you could possibly want to, if you had access to all of the required information. But that's not going to be a documented, or supported, way of doing so.
Topic: UI Frameworks SubTopic: AppKit Tags:
Jun ’15
Reply to FCPX Issues in El Capitan
Yes, same for me. OK with first Beta but crashes on startup with second Beta.I tried OS X Recovery to reinstall El Capitan, and it succesfully reinstalled the first Beta. FCPX then worked again.I 'upgraded' to Beta 2 and then it crashed again.
Topic: App & System Services SubTopic: Core OS Tags:
Jun ’15
How to load crash reports from appstore approval process
My first app, worked on it for 6 months. I submit it for approval and it is rejected as it crashed on load.Apple send me three crash reports as attachments. When I go into Xcode organizer, it says no crashes. I am using xcode 6.3.1. I can't see how to load the crash reports into organizer to symbolicate them. The documentation says go into devices. I can select a specific device and see crashes, but obviously the device used by the appstore for testing does not appear. I can select a device and view all logs and see the crash reports for all the local devices. However I cannot (for example) drag-and-drop the crash reports from Apple into Organizer or Devices (anywhere) to make XCode aware of them.Worked on this for 6 months, pulling my hair out trying to read these crash reports, anybody know what I am supposed to do?
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2.3k
Jun ’15
Crashing when trying to use NSFetchedResultsController fetchedObjects
As of iOS 9, and in an old iOS 8.3 beta seed (12F5047f), but not the GM version of iOS 8.3, I often see crashes when using NSFetchedResultsController fetchedObjects. For example, when creating an NSSet from them or filtering them with an NSPredicate it often crashes. In both of these cases the code is running from viewDidDisappear but that's probably just a coincidence.My Core Data stack is set up to have a main queue context and private queue context both connected directly to the persistent store coordinator, with changes from the private queue context being merged with mergeChangesFromContextDidSaveNotification (plus a workaround for NSFetchedResultsController when using this setup).Has anyone else been seeing this behavior? I can't get it to reproduce with the debugger attached but it happens frequently with regular usage.
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6.2k
Jun ’15
Reply to when I type this line of code into swift I get an error. Please help!
Gregstus, It is really difficult to give non-trivial help on a forum. Forums are really best for short answers to specific questions. Now, even though you have a specific question (why does this line crash?) and the answer turns out also to be specific (because the node doesn't exist or can't be cast to that type), it does require the context of both how SpriteKit works and how Swift works to understand why that answer answers that question! Unfortunately, I (and I assume the others trying to help) just haven't got the time/knowledge/ability/desire (delete as appropriate) to provide the necessary background and context in Swift and SpriteKit to explain how and why that answer answers that question. In order for our answers to make sense, that context has to exist.The way to get that context is by finding some write-ups and tutorials and example apps and studying them. Apple documentation and Sample Apps are one source, and there are many many tutorials on the web. Although I have quite a bit of progr
Topic: Programming Languages SubTopic: Swift Tags:
Jun ’15