gistfile1.txt

IN .h

@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;

// This is an optional property from MKAnnotation
@property (nonatomic, copy) NSString *title;

IN .m 

@synthesize coordinate, title;

- (id)initWithCoordinate:(CLLocationCoordinate2D)c title:(NSString *)t
{
    self = [super init];
    if (self) {
        coordinate = c;
        [self setTitle:t];
    }
    return self;
}


Whats the diff?

       coordinate = c;
        [self setTitle:t];