iPhone - Defining a MKMapRect with 2 MKMapPoint

How would you build the simpliest way a MKMapRect with 2 MKMapPoints, assuming that you don't know wh开发者_运维百科ere are those points (the first can be lower or upper, more on the left or the right, compared to the second one).

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Here's one way (mp1 and mp2 are MKMapPoint pairs of opposite corners):

MKMapRect mr = MKMapRectMake (fmin(mp1.x, mp2.x),
                              fmin(mp1.y, mp2.y),
                              fabs(mp1.x - mp2.x),
                              fabs(mp1.y - mp2.y));

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You could also convert your points to 2 rectangles and get the union:

MKMapRect rect1 = MKMapRectMake(point1.x, point1.y, 0, 0);
MKMapRect rect2 = MKMapRectMake(point2.x, point2.y, 0, 0);

MKMapRect finalRect = MKMapRectUnion(rect1, rect2);