objective c - How to make the union between two MKCoordinateRegion -

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i'm trying union between 2 mkcoordinateregion. have idea on how this?

there mkmaprectunion function accepts 2 mkmaprects first convert each mkcoordinateregion mkmaprect , call function (and convert result mkcoordinateregion using mkcoordinateregionformaprect function).

the conversion method might this:

- (mkmaprect)maprectforcoordinateregion:(mkcoordinateregion)coordinateregion {     cllocationcoordinate2d topleftcoordinate =          cllocationcoordinate2dmake(coordinateregion.center.latitude                  + (coordinateregion.span.latitudedelta/2.0),              coordinateregion.center.longitude                  - (coordinateregion.span.longitudedelta/2.0));      mkmappoint topleftmappoint = mkmappointforcoordinate(topleftcoordinate);      cllocationcoordinate2d bottomrightcoordinate =          cllocationcoordinate2dmake(coordinateregion.center.latitude                  - (coordinateregion.span.latitudedelta/2.0),              coordinateregion.center.longitude                  + (coordinateregion.span.longitudedelta/2.0));      mkmappoint bottomrightmappoint = mkmappointforcoordinate(bottomrightcoordinate);      mkmaprect maprect = mkmaprectmake(topleftmappoint.x,                              topleftmappoint.y,                              fabs(bottomrightmappoint.x-topleftmappoint.x),                              fabs(bottomrightmappoint.y-topleftmappoint.y));      return maprect; }

then, union:

mkcoordinateregion region1 = ... mkcoordinateregion region2 = ...  mkmaprect maprect1 = [self maprectforcoordinateregion:region1]; mkmaprect maprect2 = [self maprectforcoordinateregion:region2];  mkmaprect maprectunion = mkmaprectunion(maprect1, maprect2);  mkcoordinateregion regionunion = mkcoordinateregionformaprect(maprectunion);

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