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POComparing two dates for daily reward in iOS game
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copied!<p>I was implementing a 'daily reward' method in order to give some coins every day in my game. </p> <p>I have a json that contains the actual date and time. </p> <p>The issue is that I don't know how to compare the dates.</p> <p>Here is my code -</p> <pre><code>@implementation ItemRewardManager +(NSDate *)dateFromUTCTimeStamp:(NSString *)dateString{ NSDateFormatter *df = [[NSDateFormatter alloc] init]; df.dateFormat = @"yyyy-MM-dd HH:mm:ss"; NSDate *myDate = [df dateFromString: dateString]; NSTimeZone *gmt = [NSTimeZone timeZoneWithAbbreviation:@"GMT"]; [df setTimeZone:gmt]; [[NSUserDefaults standardUserDefaults] setObject:myDate forKey:@"lastDatePlayed"]; [[NSUserDefaults standardUserDefaults] synchronize]; } -(void)getData { NSData *jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:dateUrl]]; id jsonObjects = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:nil]; NSArray *keys = [jsonObjects allKeys]; // values in foreach loop for (NSString *key in keys) { NSLog(@"%@ is %@",key, [jsonObjects objectForKey:key]); } } +(void)dailyReward{ NSLog(@"llega al daily"); NSDateFormatter *dateFormat = [[NSDateFormatter alloc]init]; [dateFormat setDateFormat:@"HH:mm:ss zzz"]; NSDate *now = [NSDate date]; NSString *dateString = [dateFormat stringFromDate:now]; if([[[NSUserDefaults standardUserDefaults] objectForKey:@"lastDatePlayed"] isEqualToString: dateString]) { NSLog(@"Actual date is the same as json date"); UIAlertView* alert = [[[UIAlertView alloc] initWithTitle:nil message:@"You have win 5 coins! Come back tomorrow for more." delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles: nil] autorelease]; [alert show]; return; } } @end </code></pre> <p>So, when I open my app and call this method, my app crashes for some reasone.</p> <p>I think the problem might be on the comparison of the two dates. </p> <p>Can someone tell me if there is something wrong?</p>

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