On May 8, 2012, at 9:15 AM, Antonio Nunes wrote: > I have a text field that when I try to set it to a literal string fails: > This is the code: > self.myTextField.stringValue = @""; (It also fails if the literal string is > not empty).
That is quite bizarre. So much so that I’m assuming that this isn’t the actual problem, that there’s a mixup about which line is raising the exception. > This is the (partial) backtrace: > 2012-05-08 18:09:28.516 MyApp[18775:507] *** Assertion failure in > -[NSTextFieldCell _objectValue:forString:errorDescription:], > /SourceCache/AppKit/AppKit-1138.32/AppKit.subproj/NSCell.m:1564 > > Catchpoint 7 (exception thrown).2012-05-08 18:09:31.742 MyApp[18775:507] > Invalid parameter not satisfying: aString != nil > 2012-05-08 18:09:31.845 MyApp[18775:507] ( > 0 CoreFoundation 0x00007fff90d12fc6 > __exceptionPreprocess + 198 > 1 libobjc.A.dylib 0x00007fff8c3f4d5e > objc_exception_throw + 43 > 2 CoreFoundation 0x00007fff90d12dfa > +[NSException raise:format:arguments:] + 106 > 3 Foundation 0x00007fff92db1743 > -[NSAssertionHandler > handleFailureInMethod:object:file:lineNumber:description:] + 169 > 4 AppKit 0x00007fff8a9495a5 -[NSCell > _objectValue:forString:errorDescription:] + 160 > 5 AppKit 0x00007fff8a9494ff -[NSCell > _objectValue:forString:] + 19 > 6 AppKit 0x00007fff8a949465 -[NSCell > setStringValue:] + 41 > 7 AppKit 0x00007fff8aa4a5e8 -[NSControl > setStringValue:] + 115 So, what’s line 8? Are you *certain* that it’s the line you quoted above, and not some other -setStringValue: call in your code? If you set a breakpoint on the line in question, and then step over the call, does the exception trigger? The only other explanation I can think of is that some previous bug in the code has messed up the predefined NSString instance that @“” points to. But that would be hard to do — IIRC, the compile-time-constant NSStrings are somewhat magical and don’t track refcounts, so you can’t over-release them. —Jens _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
