Short Date Format for NSCalendarDate in bound NSTableColumn
Short Date Format for NSCalendarDate in bound NSTableColumn
- Subject: Short Date Format for NSCalendarDate in bound NSTableColumn
- From: Jonathan Fewtrell <email@hidden>
- Date: Sat, 16 Apr 2005 17:06:00 +0100
I have an array of model objects displayed in an NSTableView controlled via binding through an NSArrayController. One of the ivars of the model is of class NSCalendarDate and is bound to one of the NSTableColumns.
In basic form it displays OK, but the default date format is too long. Unfortunately the NSDateFormatter included in IB cannot handle the NSShortDateFormatString. There is no token for this (and I want the short format to be as set by the user in System Preferences, rather than imposing a format myself).
So I thought I'd write a ValueTransformer instead. Here's the code:
+ (Class)transformedValueClass
{
return [NSString class];
}
+ (BOOL)allowsReverseTransformation
{
return NO;
}
- (id)value
{
NSString *format;
format = [[NSUserDefaults standardUserDefaults] stringForKey:NSShortDateFormatString];
return [value descriptionWithCalendarFormat:format];
}
The last line causes an exception: -[NSCFDate descriptionWithCalendarFormat:]: selector not recognized.
Why? It seems that my NSCalendarDate has become an NSCFDate and the latter does not respond to -descriptionWithCalendarFormat. Why would that happen? _______________________________________________
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