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Note about MapKitDragAndDrop 3.2

Few weeks ago, I released MapKitDragAndDrop 3.1, a major change to switch away from synthesized by default. Since then, I got some emails about memory leaks, regressions, and suggestions.

By addressing those issues, I’m pleased to announce the MapKitDragAndDrop 3.2.

Two Major Changes

DDAnnotationView now comes with a new class method called +annotationViewWithAnnotation:reuseIdentifier:mapView:, which allows developers to create a draggable annotation view easily. It will return either DDAnnotationView (on iOS3) or drag-enabled MKPinAnnotationView (on iOS4):

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {

    if ([annotation isKindOfClass:[MKUserLocation class]]) {
        return nil;     
    }

    static NSString * const kPinAnnotationIdentifier = @"PinIdentifier";
    MKAnnotationView *draggablePinView = [self.mapView dequeueReusableAnnotationViewWithIdentifier:kPinAnnotationIdentifier];

    if (draggablePinView) {
        draggablePinView.annotation = annotation;
    } else {
        // Use class method to create DDAnnotationView (on iOS 3) or built-in draggble MKPinAnnotationView (on iOS 4).
        draggablePinView = [DDAnnotationView annotationViewWithAnnotation:annotation reuseIdentifier:kPinAnnotationIdentifier mapView:self.mapView];

        if ([draggablePinView isKindOfClass:[DDAnnotationView class]]) {
            // draggablePinView is DDAnnotationView on iOS 3.
        } else {
            // draggablePinView instance will be built-in draggable MKPinAnnotationView when running on iOS 4.
        }
    }       

    return draggablePinView;
}

DDAnnotation now init the coordinate correctly.

Though DDAnnotation is running okay on iOS 4, I would suggest you use MKAnnotation or MKPlacemark on iOS 4 instead. The reason for this is because DDAnnotation is designed for iOS 3 when MKAnnotation only has readonly coordinate property (I re-decleare it to readwrite in header file), but starting from iOS 4, Apple had provided a method to change coordinate:
```
@protocol MKAnnotation <NSObject>

// Center latitude and longitude of the annotion view.
@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;

@optional

// Title and subtitle for use by selection UI.
- (NSString *)title;
- (NSString *)subtitle;

// Called as a result of dragging an annotation view.
- (void)setCoordinate:(CLLocationCoordinate2D)newCoordinate __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_4_0);

@end
```
So you can change coordinate through that on iOS 4, and no longer need to re-declare the property.

Note about MapKitDragAndDrop 3.2

Two Major Changes

License

References

7 Notes/ Hide

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