I recently updated to Xcode 7 and upgraded my iPhone to iOS 9. I have developed and released an iOS app that had worked perfectly fine on the latest version of iOS 8 and Xcode 6.
Upon trying to go through the process of updated the app for iOS 9 support, I am getting the most ridiculously strange error that has left me baffled.
I have done all the syntax corrections automatically through Xcode, and now my app builds properly. It even runs fine at first.
I have a button that segues to a view controller with a WebView. This view controller loads a link that will display either an image, website, or video from youtube. The content is loaded perfectly fine as always. However, the program will crash and reboot the simulator (and my iPhone) and send me to the lock screen when I click the Back button (I am on a navigation stack).
In Xcode, I get the following messages:
XPC Connection Interrupted.
Terminating since there is no system app.
I have Flurry analytics integrated in my app by the way, not sure if thats an issue.
How can I fix this issue? My searches for XPC connections do not seem to return problems similar to mine. I do not even have a clue what an XPC connection is, so why is this in my app anyway?
EDIT: I have found a workaround for the issue. I cannot really say it is a fix.
The crashing was occurring during the use of the method self.navigationController?.popViewControllerAnimated, when set to true. I happened to set this to false, and the crashing stops (now the transition looks awful).
I do not know why this works, and just adds to my confusion.
The problem lied in the storyboard for me as well. I created a new project and laid out the views and everything seemed to be working fine. I found these couple lines in the storyboard source (right click on storyboard and select view as -> source code) which weren't common between the working version and the broken version:
<keyCommands>
<keyCommand/>
</keyCommands>
I have no idea what those lines are supposed to do, or how they crept into my storyboard file, but they were what was crashing the app so hard that the phone had to restart. I removed those lines from my main project and everything worked again.
This error can be caused by executing a loop repeatedly. In my case it was a 'for' loop in which I reset the counting variable. As soon as I added an NSLog in the loop it was obvious.
I just faced the same problem. I don't know if that will help you, but I also think it's coming from the Storyboard:
In my case, the problem is coming from a UITextView. Whenever I try to change the default text inside it, I have this error. If I let the default text or leave it empty, the app works fine. Making an IBOutlet and changing the text programmatically works as well.
I tried with other UI elements, but only the UITextView seems to have this issue.
I have struggled with exact same error. Through a process of elimination I established that it had nothing to do with the any class but had to do with the storyboard. Luckily I keep regular backup copies and I tried to compare storyboards to establish what I had done - but could find nothing obvious.
The backup copy worked fine and I was able to copy my controller classes (from the faulty copy with the changes) into the backup copy and they worked fine.
I think there is a bug possibly in storyboards.
I have same error message when I place a subview in -layoutSubviews method:
-(void)layoutSubviews
{
[super layoutSubviews];
[self populateByImageViews];
}
It causes infinite cycle of layout process and crashes app. Don't place subviews in this place!
Deleting UITextView from the one of the view in Storybord removes the error in my case.
In valueChanged: method of a UIControl, I had the same problem
so I made the code inside valueChanged: to run in main thread and it solved the problem.
#IBAction func valueChanged(sender: AnyObject) {
dispatch_async(dispatch_get_main_queue(), {
//code
}
}
For me was some missing constraints with a UISearchBar, but the error was only in the simulator.
I only add some constraints and works better
For me it was xcode live issues caused by IB_DESIGNABLE
If you have any IB_DESIGNABLE in source files, the system's live tracker will check for issues in StoryBoard too. It may leads to unnecessary building.
To disable it-
Open Storyboard file. Editor -> Automatically Refresh Views (Uncheck)
If you needs to Disable Live issue tracking
XCode -> Preferences -> General -> Issues -> Uncheck Live Issues
Reference
My issue probably originated with some storyboard issue, but I cleaned the project, restarted Xcode AND restarted the simulator app and that fixed it.
When using QLPreviewController, I am confronted with this problem. Error messages as follows,
XPC connection interrupted
_BSMachError: (os/kern) invalid capability (20)
_BSMachError: (os/kern) invalid name (15)
Since XPC means OS X interprocess communication, so I think this can solve the problem, especial when updating the UI
dispatch_async(dispatch_get_main_queue(), ^{
// do what you want to do.
});
For Swift 4+, user
DispatchQueue.main.async {
//Your Code
}
The application works fine on the simulator but breaks in start up in device as in the figure
I tried some of the solution in SO but It doesnt work out.What may be the reason ?How can i find it? How to resolve it
For clarity
Tried : Changing the view controller the viewcontroller. view did load and all functions are working fine after that when the view tries to appear on the screen the crash appears
UPDATE : Now getting the error logged as
*** -[Not A Type retain]: message sent to deallocated instance 0x208c9610
I had the same issue before. This is not a crash. Please remove all your break points and run it again.
This is a Breakpoint error ..... It normally occurs when you add a breakpoint to an app running in the device. If you add the breakpoints before the app has been built and run it again.... The crash will not occur.
Even I couldn't figure out why this crash should occur in the first place but it does.
OK found out the problem.I am using an external library which does not implement ARC so it has to be flagged.all files except 2 are not flagged as -fno-objc-arc and hence the issue.
I brought a new MAC-MINI before this i was using MAC BOOk Pro..
i am facing some problem with xcode, the problem is when i run the Application where ever there is a TextField in the UI when i click to enter its not taking input,it takes hardly 1 or 2 strings and throws thread....
when i try to enter its throwing Thread in main() function telling EXC_BAD_ACCESS...
NOTE:The apps which were working before in Mac book Pro's xcode i mean apps which contains TEXTFIELD in the UI is also not taking input in the present xcode of MAC MINI.
if i tried without writing any code just placing a TextField in the UI and running it ,even then i am not able to enter anything in the UI its just throw Thread in main() function EXC_BAD_ACCESS..
I am not able to solve this issue may i know why its happening like this?
ITS NOT TAKING ANY INPUT IN TEXTFIELD OF PREVIOUS WORKING APPS AS WELL..
Is the problem with Xcode?
Plz Suggest me to solve this issue..
Thank u
Are you setting an object as the textField's delegate?
When you type in the text field, it tries to call its delegate (if it's not nil) to notify about a change in the text. If for whatever reason the delegate is dealloc'ed, you get this type of error, as the textField is trying to reference a deallocated object.
I am having a bug that has got me stumped. I created a label a short while ago that was just a placeholder to be replaced in the future. Finally, I get to replacing it with a button, so I delete the UILabel and put a UIButton in its place (keep in mind this is all in Interface Builder). When I run the program in the simulator, the new button isn't there and instead there is the old label which has been deleted. I have searched my whole program and I have no reference to this label, it is completely out of my program, yet it still appears in IB and my new button does not. I have tried Cleaning the program and quitting Xcode several times to no avail. If anybody knows of or has faced a similar problem I would love to hear your solution.
Thanks,
Kyle
It seems in your case NIBs are cached in Simulator, delete your app from inside Simulator and rebuild/reinstall then it shall be fine.
With xcode 3 I would have guessed that you did not save the xib file within Interface Buidler.
Still in xcode 4 I sometimes get the impression that not all changes come to effect for whatever reason. As if one or two source files do not get compiled at all.
Then I close xcode, save everything and start over again.
i followed the tutorial -> http://icodeblog.com/2008/09/02/iphone-programming-tutorial-creating-a-todo-list-using-sqlite-part-2/
but the thing is my uitableview isnt showing anything from database!! i did an nslog and able to query the data..so what could be the possible error?
i went through line by line with the source..but still can't find any problem..anyone tried the tutorial and face similiar problem as me?
Delegate and Datasources are connected?
I downloaded the sample code and it works with no problems under OS 3.0 and 3.1.2 and
http://icodeblog.com/wp-content/uploads/2008/09/todo-part-21.zip