[英]iPhone GPS distance between two points
如何找到当前位置到另一个位置之间的距离?
CLLocation *location = [[CLLocation alloc] initWithLatitude:doubleLattitude longitude:doubleLongitude];
double distanceDouble;
if([user_Location respondsToSelector:@selector(distanceFromLocation:)])
distanceDouble = [user_Location distanceFromLocation:location];
else
distanceDouble = [user_Location getDistanceFrom:location];
This way you support both OS 4.0 and 3.0 since getDistanceFrom is deprecated now. 由于现在不赞成使用 getDistanceFrom,因此您可以同时支持OS 4.0和3.0。
In the above example user_Location is also a CLLocation object. 在上面的示例中,user_Location也是CLLocation对象。
CLLocation *locA = [[CLLocation alloc] initWithLatitude:"current location latitude" longitude:"current location longitude";
CLLocation *locB = [[CLLocation alloc] initWithLatitude:"other latitude" longitude:"other longitude";
CLLocationDistance distance = [locA distanceFromLocation:locB];
有一种方法可以找到两个CLLocation之间的距离。
CLLocationDistance distance = [firstLocation getDistanceFrom:secondLocation];
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