Convert MKMapPoint to NSValue in Swift

Question

I want to convert an MKMapPoint to a NSValue. In Objective-C i can do it with the following statement:

MKMapPoint point = MKMapPointForCoordinate(location.coordinate);
NSValue *pointValue = [NSValue value:&point withObjCType:@encode(MKMapPoint)];

How can i do that in Swift? Thanks!

Answer 1

It isn't possible in Swift, but you can still create a category in ObjC and use it in your Swift project

// NSValue+MKMapPoint.h
@interface NSValue (MKMapPoint)

+ (NSValue *)valueWithMKMapPoint:(MKMapPoint)mapPoint;
- (MKMapPoint)MKMapPointValue;

@end


// NSValue+MKMapPoint.m
@implementation NSValue (MKMapPoint)

+ (NSValue *)valueWithMKMapPoint:(MKMapPoint)mapPoint {
    return [NSValue value:&mapPoint withObjCType:@encode(MKMapPoint)];
}

- (MKMapPoint)MKMapPointValue {
    MKMapPoint mapPoint;
    [self getValue:&mapPoint];
    return mapPoint;
}

@end

The usage in Swift:

let mapValue = CGValue(MKMapPoint: <your map point>)
let mapPoint = mapValue.MKMapPointValue();