Find out invalid date in iphone device

Question

When mobile is in invalid date, how can I find programmatically, the changes in iOS device time (whether device is in past/future time)

Answer 1

May be you can use library that can fetch the date and time from a time server.

Library https://github.com/jbenet/ios-ntp wil do same job for you.

Usage:

#import "ios-ntp.h"

@interface ntpViewController : UIViewController <NetAssociationDelegate>

@end

@implementation ntpViewController
- (void)viewDidLoad {
    [super viewDidLoad];

    netAssociation = [[NetAssociation alloc]
    initWithServerName:[NetAssociation ipAddrFromName:@"time.apple.com"]];
    netAssociation.delegate = self;
    [netAssociation sendTimeQuery];
}

- (void) reportFromDelegate {
    printf("time offset: %5.3f mSec", netAssociation.offset * 1000.0];
}

Check here for more information and reference:

https://github.com/jbenet/ios-ntp