Question

I am comparing date1 to date2 with a small bit of code, and am getting a crash notification.

I get date1 in NSUserDefaults with this:

NSDate *date1 = [[NSUserDefaults standardUserDefaults] 
objectForKey:@"date1"];

NSDate *date2 = [[NSDate alloc] init]; 

if (fabs([date2 timeIntervalSinceDate:date1]) < 60)
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"60 seconds or less" message:@"Text" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
    [alert show];
    return;
}

I am storing date1 in NSUserDefaults like this:

NSDate *date1 = [[NSDate alloc] init];

[[NSUserDefaults standardUserDefaults] setObject:date1 forKey:@"date1"];

[[NSUserDefaults standardUserDefaults] synchronize];

The app is crashing saying that -[__NSCFString timeIntervalSinceReferenceDate]: unrecognized selector sent to instance. Anyone have any ideas?

Thank you!

Answer 1

I have compiled your code and it works for me. This is how it looks:

NSDate *date1test = [[NSDate alloc] init];
[[NSUserDefaults standardUserDefaults] setObject:date1test forKey:@"date1"];
[[NSUserDefaults standardUserDefaults] synchronize];


NSDate *date1 = [[NSUserDefaults standardUserDefaults]
                 objectForKey:@"date1"];
NSDate *date2 = [[NSDate alloc] init];
if (fabs([date2 timeIntervalSinceDate:date1]) < 60)
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"60 seconds or less" message:@"Text" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
    [alert show];
    return;
}

See if this compiles for you