异常'NSInvalidArgumentException'，原因：'-[AnnotationView setCoordinate：]：无法识别的选择器已发送到实例

Question

This error only seem in Xcode Version 5.0

Before i created this my app in Xcode Version 4.6.2 , it was working very well for me, but i got this error in Xcode Version 5.0

I created custom Annotation class for generate my updated location and address.

My Code Is :

AnnotationView.h

#import <MapKit/MapKit.h>

@interface AnnotationView : MKPlacemark

@property (nonatomic, readwrite, assign) CLLocationCoordinate2D coordinate;

@property (nonatomic, strong) NSString *title;
@property (nonatomic, strong) NSString *subtitle;

@end

AnnotationView.m

#import "AnnotationView.h"

@implementation AnnotationView

- (id)initWithCoordinate:(CLLocationCoordinate2D)coordinate addressDictionary:(NSDictionary *)addressDictionary
{
    if ((self = [super initWithCoordinate:coordinate addressDictionary:addressDictionary]))
    {
        self.coordinate = coordinate;
    }
    return self;
}

@end

Above is my custom class. I used it in my MapView.

CLLocationCoordinate2D theCoordinate ;
    theCoordinate.latitude = [self.latitude doubleValue];
    theCoordinate.longitude = [self.longitude doubleValue];

    AnnotationView *annotation = [[AnnotationView alloc] initWithCoordinate:theCoordinate addressDictionary:nil] ;    
    annotation.title = self.businessName;
    annotation.subtitle = self.businessAddress;
    [self.mapView addAnnotation:annotation];

    MKCoordinateRegion adjustedRegion = [self.mapView regionThatFits:MKCoordinateRegionMakeWithDistance(theCoordinate, 8000, 8000)];
    [self.mapView setRegion:adjustedRegion animated:YES];

Please suggest me where i make mistake.

Answer 1

The superclass of your AnnotationView , which is MKPlacemark , already stores the coordinate - note that you pass it into the super initWithCoordinate: method - so you don't need to store the coordinate in your subclass. Let the superclass handle it.

In other words, you should remove this line from your AnnotationView class:

self.coordinate = coordinate;

If you need to access the coordinate property from your AnnotationView , just use [super coordinate] .

Be careful about overriding the properties of superclasses with your own property with the same name - generally speaking, you don't want to do this!

As for why you are getting problems in Xcode 5 when it was ok before: this could be because a different version of the compiler is interpreting the code slightly differently. Your code was always problematic, it's just that the compiler is now noticing a problem with it.