查找iPhone的从A点到B点的距离

Question

嘿，我正在尝试计算iPhone上1个点到另一个点的距离（水平），我不确定

Answer 1

Hi you need to create to instance of CLLocation, and call the methods to calculate.

CLLocation *locationOne = [[CLLocation alloc] initWithLatitude:[point coordinate].latitude longitude:[point coordinate].longitude];
CLLocation *locationTwo = [[CLLocation alloc] initWithLatitude:[secondPoint coordinate].latitude longitude:[secondPoint coordinate].longitude];
double distanceInMeters = [locationOne distanceFromLocation:locationTwo];

If you want distances between two points, you should remember Pitagora:

CGPoint pointA, pointB;
double distancesInPoints = sqrt((pointA.x-pointB.x)*(pointA.x-pointB.x) + (pointA.y-pointB.y)*(pointA.y-pointB.y));