问题描述

距离计算方法 ios开发

#pragma mark===计算距离
-(double)distanceBetweenPoint:(CGPoint)begin otherPoint:(CGPoint)end{
// NSLog(@"%lf//%lf//%lf//%lf",begin.x,begin.y,end.x,end.y);
double R = 6371.0;
double distance = 0.0;
double dLat = (begin.x - end.x) * M_PI / 180.0;
double dLon = (begin.y - end.y) * M_PI / 180.0;
double a = sin(dLat / 2) * sin(dLat / 2) + cos(begin.x * M_PI / 180.0) * cos(end.x * M_PI / 180.0) * sin(dLon / 2) * sin(dLon / 2);
distance = (2 * atan2(sqrt(a), sqrt(1 - a))) * R*1000.0;
// NSLog(@"%lf",distance);
return (distance>0.0 ? distance :0);
}

解决方案

你有什么问题？没看懂。是出错了还是答案不符合要求？