Subclassing UIButton but can't access my properties
- by Ross Ellerington
Hi,
I've created a sub class of UIButton:
//
// DetailButton.h
#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
@interface MyDetailButton : UIButton {
NSObject *annotation;
}
@property (nonatomic, retain) NSObject *annotation;
@end
//
// DetailButton.m
//
#import "MyDetailButton.h"
@implementation MyDetailButton
@synthesize annotation;
@end
I figured that I can then create this object and set the annotation object by doing the following:
MyDetailButton* rightButton = [MyDetailButton buttonWithType:UIButtonTypeDetailDisclosure];
rightButton.annotation = localAnnotation;
localAnnotation is an NSObject but it is really an MKAnnotation. I can't see why this doesn't work but at runtime I get this error:
2010-05-27 10:37:29.214 DonorMapProto1[5241:207] *** -[UIButton annotation]: unrecognized selector sent to instance 0x445a190
2010-05-27 10:37:29.215 DonorMapProto1[5241:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UIButton annotation]: unrecognized selector sent to instance 0x445a190'
'
I can't see why it's even looking at UIButton because I've subclassed that so it should be looking at the MyDetailButton class to set that annotation property. Have I missed something really obvious. It feels like it :)
Thanks in advance for any help you can provide
Ross
