My iphone app crashes with the following error message:
2010-07-26 16:27:30.402 Nav[814:207]
* -[UITextField isNaturallyRTL]: unrecognized selector sent to instance
0x3947fe0 2010-07-26 16:27:30.403
Nav[814:207] * Terminating app due
to uncaught exception
'NSInvalidArgumentException', reason:
'*** -[UITextField isNaturallyRTL]:
unrecognized selector sent to instance
0x3947fe0'
I can't find the text isNaturally RTL in my program. Any ideas on how to find the bug?
It seems that isNaturallyRTL is an (undocumented) NSString method. At least NSString responds to it.
This may mean that you assign a UITextField to some variable, where you should put in an NSString instead.
BTW: 0x3947fe0 is the pointer to the UITextField that should be an NSString, so if you're totally lost, try to find out which UITextField has that address (e.g. by a dumb NSLog("tf X: 0x%x",tfx);)
I found the problem. It was in this line of code:
[tempValues setObject:textFieldBeingEdited forKey:tagAsNum];
I changed it to the following:
[tempValues setObject:textFieldBeingEdited.text forKey:tagAsNum];
and that's what fixed it.
It's because your UITextField object is somehow assigned to a variable/property which is not supposed to be a UITextField.
It can happen in many different ways.
You might have connected the IB outlet incorrectly. Check your nib in the Interface Builder to see your UITextField is not connected to something strange.
You might have just assigned an UITextField to a variable of a different type. In that case, the compiler should have given you a warning. Correct your code and remove all the warnings.
You might have not correctly done retain/release. Do "build and analyze", and remove all warnings.
Related
So I'm new to objective c, practically new to programming in general.
Anyway, in my simple program, I control-dragged my UITextField from the storyboard into my ViewController.m thinking it was a way to create a method to be invoked when the field was entered/tapped on. It wasn't long until I deleted the method.
When running the simulator, the keyboard would come up and the text field would already be focused on. If I tapped anywhere else on the screen, it resulted in a crash giving me the unrecognized selector error for the selector I already deleted.
There's nothing in my ViewController.h and the rest of the code seems fine. If I re-add the selector with no instructions, it behaves as intended and the keyboard resigns. My question is, why am I getting this error?
It would be more helpful to have the output of the crash. With that said I suspect your storyboard still has an outlet hooked up, referencing the function or outlet you created. From your storyboard click on your textfield and then navigate to the connections inspector (view -> utilities -> connections inspector). From there you should be able to see any connections you have made. Click the x to get rid of it.
The connection inspector is the icon in the upper right with the right facing arrow inside of a circle.
Edit:
I realized you asked why this is happening and not how to fix it. Unrecognized selector means just what it sounds like. Your code, in this case the storyboard is trying to call a method or access a variable on an object that doesn't implement that method. Normally the compiler catches these types of errors in your code but there are cases it can't catch, like the one your experiencing. For example it is ok to assign an NSArray object to a variable declared as something else, say an NSString as follows
id object = #[#"hello", #"world"];
NSString *notAString = object;
[notAString length];
Try running this and it will crash with a similar error because NSArray implement the length method, or in Objective-c speak, it doesn't respond to the selector "length".
Most typically it's this:
Select your UITextField in IB, go to the Connections inspector and remove the ghost connection to the removed method.
For some reason I'm having a very difficult time wiring my NSToolbarItem to an IBAction.
I'm using an NSWindowController with its own XIB. The NSToolbar is dropped into the XIB, and I added the NSToolbarItem without issue. This whole NSWindowController is created by a master NSViewController when an image is clicked.
The problem lies with the new button not sending. I unchecked "Autovalidates" and checked "Selectable" so that I could actually click the button.
However when pressed, I receive "unrecognized selector sent to instance".
I've wired this several times over through the XIB interface to make sure I wasn't messing up.
What's going on? Thank you.
Full error:
-[__NSCFType buttonPressed:]: unrecognized selector sent to instance 0x101915010
The delegate class does not know the selector you've wired. Either your delegate is wrong or you've got a typing error in your method.
Check the signature of the Method you've declared in your headerfile vs. its implementation in the class file. Perhaps you forgot to declare a parameter.
edit:
the class type where the selector is called looked weird, so I googled __nscftype unrecognized selector. here are some suggestions, it seems like your delegate is already disposed :
http://imlocation.wordpress.com/2007/09/13/strange-objects-nscftype-indicate-memory-management-bugs/
[__NSCFType searchKeyword:]: unrecognized selector sent to instance 0x6d8eb80
Warning: complete newbie Xcode question.
In MainViewController.h I have the following line:
IBOutlet WorkItem *m_WIone;
I have created a class called WorkItem which is inherited from UILabel. The line above is so that I can use m_WIone (which will eventually become an array of such objects) as a member variable throughout MainViewController.
I have tried various ways to call WorkItem methods and finally settled on:
[m_WIone Reset];
where Reset is a WorkItem method. The method is declared in WorkItem.h as:
-(void) Reset;
and in WorkItem.m as:
-(void) Reset {}
With or without contents in this method, the app always crashes with:
Thread 1: Program received signal: "SIGABRT".
In the logging, I read:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UILabel Reset]: unrecognized selector sent to instance 0x6a5f9f0'
How can I solve this? Am I even declaring this member variable correctly? (Despite trawling through StackOverflow, I cannot find the solution.)
Did you specify your custom class for the NIB? It seems like you want a widget in XCode's Interface Builder to use your custom class. Only the default class (UILabel) would be instantiated instead of your custom class.
Click on the UILabel you're using as the outlet and change the class (the screenshot here is for UITableView, but it should work the same for UILabel).
With that being said, there are alternatives to what you're trying to do. Instead of just using UILabel (which you eventually plan to make an array of them). Why not use a UITableView and customize cells to what you see fit (since UITableViews optimal for displaying lists of items)?
i am getting an NSInvalidArgumentException with reason: -[UITapGestureRecognizer initWithCoder:]: unrecognized selector sent to instance
my understanding was that UITapGestureRecognizers were supported in ios4.x?
is it possible to load a different xib file for sub ios5 versions?
As #mit3z states in his comment on the original question, iOS 4.3 supports this feature only when setup up manually with code. It is not supported with Interface Builder.
Apple would have saved us all grief over this if they simply added this as a build-time warning.
I think you have a NSCoding compliant object that is deallocated before the crash. The UITapGestureRecognizer is allocated at its address and when the disappeared object (but not its reference) tries to call initWithCoder on itself, it actually calls this method on your gestureRecognizer instead.
Then your problem comes from that deallocated object but not from your gestureRecognizer.
Be sure to retain all your IBOutlet properties.
I see this in my log:
2011-08-05 17:29:45.994 Test[3834:707] -[MyClass copyWithZone:]: unrecognized selector sent to instance 0x102218b90
what usable information does this line contain to track down exact point where unrecognized selector is sent? My understanding is that 3834 is PID, but I don't know what is 707 value. Also, is unrecognized selector copyWithZone: or is that place where the problem occured? (I don't override that method anywhere though)
copyWithZone: is the unrecognized selector. It was being sent to an instance of MyClass. My guess is you tried to use this object as a key in an NSDictionary? You can only use objects which conform to the NSCopying protocol as keys.
This looks like you failed to make MyClass a subclass of NSObject. (sorry, #jtbandes is right. It's not NSObject, it's NSCopying.)
707 is the thread identifier.
To track down where this happened, in the Run menu of Xcode 3, select "Stop on Objective C Exceptions." In Xcode 4, use an exception breakpoint.