Re: new to cocoa
Re: new to cocoa
- Subject: Re: new to cocoa
- From: Dave DeLong <email@hidden>
- Date: Thu, 13 May 2010 22:24:19 -0600
Yes, you cannot use UIButton's as keys in a dictionary, because keys in a dictionary are copied, and buttons are not copyable.
Here's the better question: what are you trying to do? Using buttons as keys in a dictionary seems... odd.
Cheers,
Dave
On May 11, 2010, at 2:36 PM, Alejandro Marcos Aragón wrote:
> Hi all,
>
> I'm new to Cocoa, and I couldn't find information about an error that I'm getting on the web. I'm trying to create an NSMutableDictionary where the keys are of type UIButton*:
>
>
> // create button for unit
> UIButton* unitButton = [[UIButton alloc] init];
> [sourceButtonMap setObject:[NSString stringWithString:@"no"] forKey:unitButton];
>
> Of course, the sourceButtonMap is defined in the class and initialized in the init function as sourceButtonMap = [[NSMutableDictionary alloc] init];
>
> The error I get when I try to add the key-value pair is:
>
> *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UIButton copyWithZone:]: unrecognized selector sent to instance 0x3931e90'
>
> Is this happening because I can't store UIButton* as keys?
> Can anyone point me why I'm getting this error? Thank you all,
>
> aa
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| | >new to cocoa (From: Alejandro Marcos Aragón <email@hidden>) |