计算两组坐标之间的距离(NSStrings)

Question

我有两组地理坐标,我正在尝试计算它们之间的距离.我已经做了一些挖掘,但无法弄清楚如何做到这一点.我试图获得用户(userLatitude/userLongitude)和地点(placeLatitude/placeLongitude)之间的距离.我的坐标存储为NSStrings,如下所示.有谁知道如何做到这一点？谢谢你们!

NSString *userLatitude =[(PDCAppDelegate *)[UIApplication sharedApplication].delegate 
getUserLatitude];

NSString *userLongitude =[(PDCAppDelegate *)[UIApplication sharedApplication].delegate 
getUserLongitude];

NSString *placeLatitude = [element1 objectForKey:@"placeLatitude"];

NSString *placeLongitude = [element1 objectForKey:@"placeLongitude"];

Answer 1

这可能对你有帮助.尝试从lat中创建CLLocation

CLLocation* Location1;
CLLocation* Location2;
CLLocationDistance distance = [Location1 distanceFromLocation:Location2];