iPhone SDK：将MKMapPoint转换为CGPoint [英] iPhone SDK: Convert MKMapPoint to CGPoint

问题描述

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。似乎我不知何故需要将MKMapPoint转换为CGPoint以便我可以更改中心，但数字似乎已经过时了。以下是我正在使用的内容：

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;

关于如何使我的MKMapPoint成为可用于图像中心属性的值的想法？

Ideas on how to make my MKMapPoint a workable value to use for the center property of my image?

推荐答案

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:

CGPoint newCenter = [self.map convertCoordinate:coord toPointToView:self.map];

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