百度地图中计算两点之间距离的方法
BMKMapPoint point1 = BMKMapPointForCoordinate(CLLocationCoordinate2DMake(38.085178, 114.502358));
BMKMapPoint point2 = BMKMapPointForCoordinate(CLLocationCoordinate2DMake(38.085171, 114.502312));
CLLocationDistance distance = BMKMetersBetweenMapPoints(point1,point2);
NSLog(@"距离: %0.2f米", distance);
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