iPhone SDK：将 MKMapPoint 转换为 CGPoint
我已将 MapView 上的经度和纬度转换为 MKMapPoint。然后我想使用 imageViews center 属性将 imageView 移动到该点。看来我需要以某种方式将 MKMapPoint 转换为 CGPoint 以便我可以更改中心，但数字似乎相差很远。这是我正在使用的：
// Convert to MKMapPoint
CLLocationCoordinate2D coord;
coord.latitude = [loc.latitude doubleValue];
coord.longitude = [loc.longitude doubleValue];
MKMapPoint point = MKMapPointForCoordinate(coord);
// Move our image
CGFloat newXPos = point.x;
CGFloat newYPos = point.y;
CGPoint newCenter = {newXPos, newYPos};
self.movingMarker.center = newCenter;
//self.movingMarker.frame.origin.x = point.x;
//self.movingMarker.frame.origin.y = point.y;
有关如何使我的 MKMapPoint 成为可用于图像中心属性的可行值的想法？
I have converted a longitude and latitude on my MapView to a MKMapPoint. I then want to move an imageView to that point using the imageViews center property. It seems that I somehow need to convert the MKMapPoint to a CGPoint so that I can change the center, but the numbers seem to be way off. Here is what I am using:
// Convert to MKMapPoint
CLLocationCoordinate2D coord;
coord.latitude = [loc.latitude doubleValue];
coord.longitude = [loc.longitude doubleValue];
MKMapPoint point = MKMapPointForCoordinate(coord);
// Move our image
CGFloat newXPos = point.x;
CGFloat newYPos = point.y;
CGPoint newCenter = {newXPos, newYPos};
self.movingMarker.center = newCenter;
//self.movingMarker.frame.origin.x = point.x;
//self.movingMarker.frame.origin.y = point.y;
Ideas on how to make my MKMapPoint a workable value to use for the center property of my image?
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看起来 MKMapView 有一个方法可以做到这一点：
Looks like MKMapView has a method for doing this: