發現從A點到B點的距離爲iPhone

Question

嘿，我想計算1點的距離，另一對iPhone（水平）林不知道

Answer 1

怎麼嗨，你需要創建的實例CLLocation，並調用計算的方法。

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]; 

如果你想要兩個點之間的距離，你應該記住Pitagora：

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