发现从A点到B点的距离为iPhone

Question

嘿，我想计算1点的距离，另一对iPhone（水平）林不知道

Answer 1

怎么嗨，你需要创建的实例CLLocation，并调用计算的方法。

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]; 

如果你想要两个点之间的距离，你应该记住Pitagora：

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