Iphone-sdk - "can not use an object as parameter to a method"

Question

my .h file is as follows

#import <Foundation/Foundation.h>

@interface MyClass : NSObject {
}
- (void) addWidget: (Widget*)aWidget;
@end

For sake of example, Widget is just some simple class that only holds a couple of strings. Apparently, either i'm doing something wrong or am just spoiled by Java / C# because when I try building, the compiler tells me that i can't use an object as a parameter to a method.

Does anyone know what I'm doing wrong? Or do objective-c methods not accept complex types? (say it ain't so!)

[UPDATE] Ok this is odd.. but I just selected "clean" from the Build menu and now the error went away.. ah.. such misdirection on my part.

Answer 1

The only thing wrong with that code is that Widget isn't declared anywhere. You should either #import "Widget.h" or put @class Widget; before the type is used.