Need to archive CLLocation data

Question

I have an array of CLLocation data that I would like to archive. Should the NSUserDefaults system be used? Otherwise, how best to archive the

Answer 1

To correctly store a CLLocation without loss of information, use an NSKeyedArchiver like this:

CLLocation *myLocationToStore = ...; // (a CLLocation object)
NSData *locationData = [NSKeyedArchiver archivedDataWithRootObject:myLocationToStore];

This can then be archived to NSUserDefaults, and likewise decoded just as simply when you retrieve it with NSKeyedUnarchiver:

CLLocation *myStoredLocation = (CLLocation *)[NSKeyedUnarchiver unarchiveObjectWithData:locationData];

The Swift equivalent functions are:

class func archivedDataWithRootObject(_ rootObject: AnyObject) -> NSData]
class func unarchiveObjectWithData(_ data: NSData) -> AnyObject?