I’m using Xcode 8 under OS X 10.11.6 but the problem persists with Xcode 7. I have a main application and it’s helper, they share a group container.
prefsFile = [[NSUserDefaults alloc] initWithSuiteName:kAppGroupName];
When I synchronize the NSUserDefaults during the session, all works fine but the helper needs to synchronize the preferences file when it receive the applicationShouldTerminate message : when the Mac shuts down or is restarted. It seems that synchronize in this case has no effect and is ignored. Not always but sometimes, randomly.
I always test the returned value of the method synchronize and this value is always YES. If NO, a message is sent to the log of the application.
Is there a way to solve the problem ?
Related
I'm currently trying to set up a notification service using the old NSUserNotification API on macOSX (not iOS) in objective c++.
The catch is that I would need to know the system preferences associated with notifications that the user set (and preferably during the rest of runtime too) to determine if my notifications are actually seen. The application is meant to get the users attention in some way to guarantee things like reminders don't go unnoticed, so the thing I want to avoid is a notification delivered that silently doesn't produce any sound nor image on the screen whatsoever without the application knowing. If the notification is not allowed the application should handle it in some other way.
I am working on a macOS 10.14 Mojave machine. My overall code with NSUserNotificationCenter works fine with a custom Delegate that implements shouldDeliver, didActivate etc. Its just that I am currently assuming the user didn't press the "frick off" button on my notifications.
Unfortunately, NSUserNotificationCenter and related classes don't appear to feature a function that determines the permissions the way the new API (UNUserNotificationCenter) does. I have been trying to resolve this for a few hours so I was wondering if anyone else has found a solution to this. I can't really use the new API since this is strictly for back-compatibility in favour of the possibly rather prevalent amount of people who don't use mojave yet.
Things I have tried to make it work so far:
Try and see if there is a .plist somewhere where these settings are stored, in the User-specific Library folder as well as the general Library folder.
Try and find said .plist using CFPreferencesCopyKeyList and related methods. Apparently I don't really know the right domain name.
This answer from 2012 which appears to be outdated since I cannot locate the database on my machine anymore. Might be due to me using a mojave machine, or the file has since moved somewhere else.
Try and determine whether we can retro-actively check our permissions by checking a NSUserNotification's "presented" property on didDeliverNotification, shouldPresentNotification in the delegate. Unfortunately as stated in NSUserNotificationCenter itself it still behaves the same whether the preferences allow notifications or not.
Some code I tried includes the following:
CFPreferencesCopyKeyList((CFStringRef) #"com.apple.systemPreferences.plist", kCFPreferencesCurrentUser, kCFPreferencesCurrentHost);
CFPreferencesCopyKeyList((CFStringRef) #"com.apple.systemPreferences.plist", kCFPreferencesAnyUser, kCFPreferencesAnyHost);
//Unfortunately returns null with any combination of com.apple.notificationcenter.plist, kCFPreferencesCurrentUser, kCFPreferencesCurrentHost
CFPreferencesCopyKeyList((CFStringRef) #"com.apple.notificationcenter", kCFPreferencesAnyUser, kCFPreferencesAnyHost);
On my system (only macOS High Sierra), it looks like the file you're after is:
~/Library/Preferences/com.apple.ncprefs.plist
That would correspond to a combination of kCFPreferencesCurrentUser, and kCFPreferencesAnyHost. (For the record, kCFPreferencesCurrentUser + kCFPreferencesCurrentHost equates to pref files in the ~/Library/Preferences/ByHost/ folder).
I don't think any settings would be stored in the local domain (by that I mean in the root /Library/Preferences/ folder).
I was able to get a list of apps and settings using the following code:
[[NSUserDefaults standardUserDefaults] addSuiteNamed:#"com.apple.ncprefs"];
NSArray *apps = [[NSUserDefaults standardUserDefaults] objectForKey:#"apps"];
NSLog(#"[%# %#] apps == %#", NSStringFromClass([self class]), NSStringFromSelector(_cmd), apps);
NOTE: this will not work if your app is sanboxed, as access to other pref files like that will be denied.
From time to time, but not always (I have had this working for a bit), the app/extension gets in a state where I can't read a flag set in my App Group between my companion app and my app extension. Don't know how it gets in this state or why the values differ, but it's critical to my application these always be in sync.
Companion app viewDidLoad:
NSUserDefaults *myAppSettings = [[NSUserDefaults alloc] initWithSuiteName:#"group.myapp"];
.....
[myAppSettings setBool:true forKey:#"myBool"];
[myAppSettings synchronize];
NSLog([myAppSettings boolForKey:#"myBool"] ? #"Companion app - bool TRUE" : #"Companion app - bool FALSE");
App extension viewDidLoad
NSUserDefaults *myAppSettings = [[NSUserDefaults alloc] initWithSuiteName:#"group.myapp"];
[myAppSettings synchronize];
NSLog([myAppSettings boolForKey:#"myBool"] ? #"App extension app - bool TRUE" : #"App extension - bool FALSE");
Console output
Companion app - bool TRUE
App extension - bool FALSE
I also synchronize before my companion app will enter background. I have my app group set up in the portal etc.
What am I doing wrong?
EDIT
Apparently others having this problem too:
https://devforums.apple.com/message/977151#977151
"I think that this is currently very glitchy.
Sometimes the data sharing works, then a change and all of a sudden the widget can't see the shared data anymore (both on Simulator and device).
Annoying and hope it's a bit more reliable in next beta!"
EDIT 2
Looks like another person has reported this exact issue as well:
"I also noticed the same thing too.This not only happen to the
NSUserDefaults, but also all the files in the container folder. The
keyboard extension suddenly will lose read/write pemission to the
container folder after using the keyboard for a while."
EDIT 3
More evidence: https://devforums.apple.com/message/1028078#1028078
After I upgrade to beta 3, I noticed that sometimes the keyboard
failed to open the database because it failed to access to the DB
file. The keyboard has been able to access to the file before.
EDIT 4
Seems like this could be because the keyboard loses the RequestsOpenAccess flag. But I can't reproduce it, and there's no way for me to tell for sure.
EDIT 5
Seems like others are reporting this in the iOS8 GM build:
This issue still persists for me in the GM. It seems related to a
keyboard crash.. but also there seems to be some contention between
keyboard and containing app in terms of who creates the suite in what
order. I think this problem is on Apple's end. Trust me, I WANT it to
be my fault but I've spent countless hours with trial and error. No
matter what I do in code and verify with NSLog, it will end up in this
state eventually. Hoping someone finds a magic pill. :S
Has anyone solved this yet?
You must request open access in order to access shared NSUserDefaults. It's stated directly in the App Extension Programming guide:
By default, a keyboard has no network access and cannot share a container with its containing app. To enable these things, set the value of the RequestsOpenAccess Boolean key in the Info.plist file to YES.
Be sure you change the RequestsOpenAccess field to YES. You'll find it in keyboard's Info.plist > NSExtension > NSExtensionAttributes > RequestOpenAccess. Then remove the keyboard in Settings, delete the app, run it again, and add the keyboard again. After you add it, tap on the keyboard name and then flip the switch to enable Allow Full Access. You'll need to instruct the users to follow those same steps to grant access (and reassure them you're not evil), otherwise it simply will not work and you'll never get the data that's stored in your shared container. Note that in iOS 8.3+, if the user hasn't enabled full access the keyboard will be able to access the shared container, but writing to it will not save the data, for security and privacy purposes. In 8.2- you can't access that data without open access granted.
I can confirm that the problem is related to RequestsOpenAccess flag.
Assuming that everything done right (NSUserDefaults use initWithSuiteName, all Capabilities for main application and custom keyboard were set, etc.) I have the next steps:
1) Install the main application and a custom keyboard on device
2) Set 'Allow full access' for the custom keyboard to YES
3) Add some items (in my case this is a simple text templates) in the main app
4) Go to keyboard and check that all items, that were added from the main app,
appeared in custom keyboard
5) Go to main app and add a few more items
6) Go to keyboard and now you will see that nothing changed
7) Go to settings and switch 'Allow full access' to NO and then to YES
8) Go to custom keyboard again and check that item which were added in step 5 appeared.
Im developing an app on OSX that uses CoreBluetooth. I have encountered a problem on OSX Mavericks that i cant seem to get around. (All of this works perfectly on OSX 10.8).
First lets go through the flow of the application
This flow is fairly established and has been used used successfully in iOS apps and works on 10.8. So on Mavericks, the first run completes successfully. It scans, finds and connects to the device correctly. It also saves out the UUID of the device to a .plist file along with other properties.
Upon relaunch of the app, it attempts to go down the left hand column of the flow which is where the problems seem to occur.
So the first issue i noticed was that my call to self.central retrievePeripherals: never calls my delegate callback of -(void)centralManager:(CBCentralManager *)central didRetrievePeripherals:(NSArray *)peripherals
. It simply never gets the callback on Mavericks.
My next thought was "oh they have a new API for fetching peripherals on Mavericks and the old one is deprecated, lets try that". So i added in my calls to NSArray *identifiers = [self.central retrievePeripheralsWithIdentifiers:#[uuid]]; and i get caught in a sempahore wait trap. Upon closer debugging of what was going on it turned out that sometimes my CBCentralManager gets into a state of CBCentralManagerStateUnknown and never updates the state to a newer one.
The next thing i tried was to fire up Activity Monitor and kill the blued process. Finally, my delegate callback for -(void)centralManagerDidUpdateState:(CBCentralManager *)central was called with the correct CBCentralManagerStatePoweredOn so i performed retrievePeripheralsWithIdentifiers again and received an empty array.
So all of these problems seem to be linked to blued in some way. Does anyone have more insight into this process to elude as to what is going on?
My main question is. Why does this work the first time through the app but not the second? Upon quitting the app after the initial scan and connection it seems i can no longer use the system bluetooth for anything without resetting blued (which even then doesn't retrieve peripherals). Is there some sort of shutdown sequence i need to do on the CBCentralManager to keep blued from going AWOL?
Any advice would be greatly apprecciated!
While this is obviously a very old thread, I stumbled upon the same issue today and decided to post a fix for posterity.
I was trying to hack together a simple app based on the HeartRateMonitor example provided by Apple. Unfortunately, it does not work on 10.9 if autoConnect is set to TRUE, what's worse, it brings blued down on its knees.
In 10.9, a call to the (deprecated) retrievePeripherals freezes blued without a chance to restore. CBCentralManager goes into CBCentralManagerStateUnknown, Bluetooth cannot be turned on/off using OS functions etc. The only solution that I found is to killall -9 blued.
However, the synchronous retrievePeripheralsWithIdentifiers worked well for me (on 10.9.4). Here's the relevant excerpt from the modified HeartRateMonitor code:
/* Retreive already known devices */
if(autoConnect)
{
NSArray *peripherals = [manager retrievePeripheralsWithIdentifiers:[NSArray arrayWithObject:(id)aPeripheral.identifier]];
NSLog(#"Retrieved peripheral: %lu - %#", [peripherals count], peripherals);
[self stopScan];
/* If there are any known devices, automatically connect to it.*/
if([peripherals count] >=1)
{
[indicatorButton setHidden:FALSE];
[progressIndicator setHidden:FALSE];
[progressIndicator startAnimation:self];
peripheral = [peripherals objectAtIndex:0];
[peripheral retain];
[connectButton setTitle:#"Cancel"];
[manager connectPeripheral:peripheral options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey]];
}
}
I've written an application that can be invoked as a service (by right-clicking a file in Finder and selecting to open it with my application), but there are a couple of unwanted side-effects when doing this.
Example of service target method:
- (void)doSomething:(NSPasteboard *)pboard userData:(NSString *)userData error:(NSString **)error {
NSArray *files = [pboard propertyListForType:NSFilenamesPboardType];
NSLog(#"Selected file(s): %#", files);
[self.anotherWindow makeKeyAndOrderFront:self];
}
1) When the application is launched this way (even if already open in debug mode), I seem unable to access other windows/controls from the doSomething function. The above attempt to show "anotherWindow", for example, produces no errors, but doesn't "do" anything. According to the stack trace, when inspected from -doSomething, all gui components have values 0x0000000000000000 - yet the application is displayed and fully functional. It's only from -doSomething that I cannot reach them. "self" also has a different value when inspected from -doSomething versus -applicationDidFinishLaunching. I'm not sure how or why -doSomething is acquiring a different self/AppDelegate with uninitialized components. Seemingly fixed by [NSApp setServicesProvider:self];
2) I am not clear on how the system decides which copy of the application to launch when the service is invoked, but it usually doesn't pick the one I want. I have a copy in /Debug, a copy in /Release, a copy on my desktop... and if I delete one, it opens the file with another one instead (some sort of fallback-chain?). How do I configure the service (in code or thru .plist) to open a specific version/location of this app? But this is a dev machine. If I release a distributable which installs to /Applications, do I ever really need to worry about this?
1) Double-check your XIB to makes sure that you've got everything hooked up correctly and then try launching the app with a breakpoint set at the NSLog above and verify that self.anotherWindow points at what you want. If, for some reason, the breakpoint isn't firing, trying adding an:
NSLog( #"Window: %#", self.anotherWindow);
To make sure everything is initialized and hooked up
2) The system uses Launch Services to determine which version of the application to launch. Often it is the version most recently added to the system (which will cause the Launch Services database to be modified), but it is possible, depending on how your system is configured, that it won't be the version you expect.
You can manually inquire and modify the launch services database using:
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister
(yeah, really long path). If you use the -dump option, that'll give you all of the data in the system (pipe into a file and search through it to get a better idea what's going on). If you search of the bundle id, you'll see all of the entries for the app. Generally, most recent wins, but you can force a reload (instructions below).
If you just want to force a reload based on a a particular binary, use the -f flag and the path to the application:
..../lsregister -f /Applications/Foo.app
You can also use -u to explicitly unregister something.
Hopefully this will give you an idea what's going on here.
I am working on an app, where I display the data entered by user in a PDF file. PDF File is also created dynamically.
All this is fine.
I have implemented QuickLook framework to display the pdf file. When I call the QL framework, PDF file id displayed quite fine but when come back to the calling screen, my app crashes without any crash log or memory warnings.
I am calling QL with below code:
[[self navigationController] presentModalViewController:qlPreviewer animated:YES];
logs created are
DiskImageCache: Could not resolve the absolute path of the old directory.
[Switching to process 3070 thread 0x17603]
[Switching to process 3070 thread 0x15503]
This is quite interesting.....
When I run the same program in Instruments to check for leaks and Memory Management, i can only find leaks when PDF document is scrolled and all the pages are viewed.
However, interestingly there is no app crash that I can see.
Also, I did try with ZombieEnabled = YES and without it but no app crash with Instruments.
I am quite clueless on how to interpret this and have been trying different things to solve this. Also, I have tried UIWebView but the result is the same.
I was again trying something to check out the issue and found something interesting.
When i execute the code directly from X-Code - i get the crash in as explained above.
In other instance, if I execute the app by clicking on the app in the sim... no crash
I am yet to check this on device. Can someone confirm the crash on the device?
Also, Google does not have answer to this question.
Thanks in advance for your answers.
Can anyone shed some light on this?
I'm having the exact same issue.
As a workaround, you can disable or remove your 'All Exceptions' breakpoint. This might make debugging a little more difficult, but it's not as bad as having to relaunch the application all the time.
This is the breakpoint causing the issue. I had set it so long ago that I'd forgotten it was there
Deleting application from device helped me to solve this problem.
Maybe also at first you should try "Product > Clean" to ensure that all resources will be copied to your device.
I was able to fix mine with this code:
FirstViewController.h
NSURLRequest* reqObj;
#property(nonatomic, retain) NSURLRequest* reqObj;
FirstViewController.m
reqObj = [NSURLRequest requestWithUrl:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60.0];
NSURLConnection* conn = [[NSURLConnection alloc] initWithRequest:reqObj delegate:self];
then instead of loading it on my view after this line i waited for the connectionDidFinishLoading then load it to my view
Interesting: This has just started with my app too. No errors when checking for leaks but running the app in the sim actually is causing a Breakpoint, not a crash. I can hit the continue and the app keeps running, no problem.
My issue also is relating to a PDF, but I'm just using a web view to display a PDF from the app bundle. I've checked everything in the dealloc, it's all good, this may be a iOS 5.1 bug. I will update as I learn more.
#JimP, It isn't an iOS 5.1 bug. It has just started happening to my app as well, on iOS5.0. It seems to only affect pdfs of more than one page length, and seems to trigger most commonly on scrolling past the end of the document (although sometimes earlier also). It also seems to happen more often on a second load.
This could happen when you delete the object reference in code but having its reference in xib. Delete the outlet that you no longer need.
Just ran into this problem of loading a pdf file in an App I am converting to iOS 8. This App has been running fine since the first iPhone. I just removed the All Exceptions breakpoint to work around it.
I don't know if it's the same problem but I had an issue where switching from a PDF view to another more than three times via the tab bar controller caused a crash.
Turned out that embedding the views I was switching to within Navigation controllers put a stop to the crashing.