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如何找出 MKMapKit 视图当前显示区域的大小,最好以米为单位?
MKMapKit 有一个visibleMapRect方法可以用来获取 a MKMapSize,文档说:
visibleMapRect
MKMapSize
该值的单位是地图点。
什么是“地图点”?
这可能会有所帮助:
iphone -- 将 MKMapPoint 距离转换为米