I have the method being called now in SecondViewController, but suddenly my
UILabel there is (null). ??
// Called from the FirstViewController
-(void)populateTextFieldWithString:(id)string {
[commandText2 setText:string];
NSLog(@"populateTextFieldWithString: %@, %@", string, commandText2 ); //
string is okay but the UILabel is (null)
}
A scope issue?
On Wed, Apr 8, 2009 at 2:12 PM, I. Savant <idiotsavant2...@gmail.com> wrote:
> On Wed, Apr 8, 2009 at 1:58 PM, Eric E. Dolecki <edole...@gmail.com>
> wrote:
> > How can I make FirstViewController aware of the method in the second
> class?
> > I tried import and still got a warning.
> ...
> > [SecondViewController populateTextFieldWithString:@"hey there"];
> ...
> > As soon as I call that method the app bombs... it has no idea what that
> > method in the SecondViewController is...
>
> You're missing some very basic Objective-C concepts. Give this
> entire document a *thorough* read:
>
>
> http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Introduction/introObjectiveC.html
>
> Essentially, you're sending an "instance method" message to a class.
> You need to understand the difference between a class and an instance
> of a class. With that understanding, you need to read about the MVC
> design pattern:
>
>
> http://developer.apple.com/documentation/Cocoa/Conceptual/CocoaFundamentals/CocoaDesignPatterns/CocoaDesignPatterns.html#//apple_ref/doc/uid/TP40002974-CH6-SW1
>
> ... then consider your application's architecture. This is how you
> decide where the best place is (some main controller in your case) to
> hold the reference (or outlet) to an instance of your
> SecondViewController.
>
> --
> I.S.
>
--
http://ericd.net
Interactive design and development
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