Le 5 sept. 2009 à 12:33, jonat...@mugginsoft.com a écrit :
On 5 Sep 2009, at 11:25, Alex Reynolds wrote:
Let's say I have a class interface and implementation, as follows:
---
@interface A : NSObject {
...
}
- (void) handleTask;
@end
@implementation A
...
- (void) handleTask {
// do stuff specific to A object type...
}
---
Let's say I then subclass A and override -handleTask:
---
@interface B : A {
...
}
- (void) handleTask;
@end
@implementation B
...
- (void) handleTask {
// do stuff specific to B object type...
}
---
If I instantiate a variable of type B, is there a way to
conditionally use the -handleTask method from either class A or B?
For example, by casting to (A *) when calling -handleTask?
http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ocDefiningClasses.html#//apple_ref/doc/uid/TP30001163-CH12-BAJHDGAC
I think a better link would have been
http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ocObjectsClasses.html#//apple_ref/doc/uid/TP30001163-CH11-SW10
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