Re: Evaluating an NSString to a symbol at runtime...
Re: Evaluating an NSString to a symbol at runtime...
- Subject: Re: Evaluating an NSString to a symbol at runtime...
- From: Andre <email@hidden>
- Date: Mon, 18 Sep 2006 21:22:23 -0700
On 2006/09/18, at 17:52, Finlay Dobbie wrote:
On 18/09/06, Mailing list subscriptions <email@hidden>
wrote:
El 18/09/2006, a las 22:45, email@hidden escribió:
> I have a situation where I have a string passed into my controller
> where it needs to be evaluated into an extern NSString constant.
> As an example, I get the value @"kABPhoneWorkFAXLabel" passed in.
>
> If I do the following:
>
> NSString *stringFromTextField = [textField stringValue]; //(IOW it
> is @"kABPhoneWorkFAXLabel" )
> ABPerson *person = [self getARandomPerson];
> [person valueForProperty:stringFromTextField];
>
> It will always of course return nil. Is there a method to evaluate
> *stringFromTextField to a named constant?
> Something like constNamed() function that would evaluate the obj-c
> symbol and find it?
man NSModule
Or for a higher level, CFBundle.
-- Finlay
OK, I tried this, but I either get "Invalid" returned or nil...
If I do a symbol lookup in the AddressBook framework, I get the
following:
a4cd60f8 s _kABEditPersonNotification
U _kABEmailHomeLabel
U _kABEmailProperty
U _kABEmailWorkLabel
U _kABFatherLabel
U _kABFirstNamePhoneticProperty
U _kABFirstNameProperty
U _kABFriendLabel
U _kABGroupClassKey
U _kABGroupNameProperty
Here is my code, still get nil....
CFStringRef accessKey = (CFStringRef)[@"_" stringByAppendingString:
[aTableColumn identifier]]; //(Returns kABEmailWorkLabel)
NSString *targetFramework = @"com.apple.AddressBook.framework";
CFBundleRef ABFramework = CFBundleGetBundleWithIdentifier
((CFStringRef) targetFramework);
NSString *ABNamedConstant = (NSString *)CFBundleGetDataPointerForName
(ABFramework,accessKey);
Still returns null, if I leave the underscore out, I get a symbol,
but its reads as "invalid"...
Any pointers??
Thanks for all the help!!
Andre
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