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POIssue with value conversion in iOS using NSUInteger and NSMutableDictionary
 

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  1. POIssue with value conversion in iOS using NSUInteger and NSMutableDictionary
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    <p>I have a <code>NSMutableDictionary</code> which holds several items in a key/value pairing. I have stored strings with a key and retrieved them without issue, however, when I store a value of type <code>NSUInteger</code> and try to fetch that back from the dictionary I end up with a really large value.</p> <p>The first part of my if statement I check to see if the value I am looking for is not null or greater than zero. I am trying to basically hold a score or value in the dictionary that I can access so I can add to or take away from.</p> <p>As you can see in the else statement I have two <code>NSLog</code> statements, this is where I see the difference in the value. The first <code>NSLog</code> statement displays a value of 100, as I would expect from clicking my 'Happy' button. However, once the value is retrieved back from the dictionary the currentTotal is 109709424. I am sure this has something to do with the format specifier I am using in the conversion of this integer value to a string. I tried storing this value, currentTotal, as an int or NSUInteger in my dictionary under the key "Total" but the conversion from a non objective-c type object to an 'id' is disallowed in ARC so I am stuck.</p> <pre><code>NSUInteger currentTotal = 0; NSUInteger happinessValue = 100; NSUInteger sadnessValue = 20; - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate]; if ([appDelegate.data valueForKey:@"Total"] != nil || [appDelegate.data valueForKey:@"Total"] &gt; 0) { currentTotal = (int)[appDelegate.data valueForKey:@"Total"]; if ([segue.identifier isEqualToString:@"Happy"]) { [segue.destinationViewController setHappiness:(int)happinessValue :segue.identifier]; currentTotal = add(currentTotal, happinessValue); [appDelegate.data setObject:(NSString *)[NSString stringWithFormat: @"Value: %i", happinessValue] forKey:@"Value"]; } else if ([segue.identifier isEqualToString:@"Sad"]) { [segue.destinationViewController setHappiness:(int)sadnessValue :segue.identifier]; currentTotal -= [segue.destinationViewController setTotalValue:happinessValue]; [appDelegate.data setObject:(NSString *)[NSString stringWithFormat: @"Value: %i", sadnessValue] forKey:@"Value"]; } } else { if ([segue.identifier isEqualToString:@"Happy"]) { [segue.destinationViewController setHappiness:(int)happinessValue :segue.identifier]; NSLog(@"Old value ELSE: %i", currentTotal); currentTotal = [segue.destinationViewController setTotalValue:happinessValue]; NSLog(@"New value ELSE: %i", currentTotal); [appDelegate.data setObject:(NSString *)[NSString stringWithFormat: @"Value: %i", happinessValue] forKey:@"Value"]; } else if ([segue.identifier isEqualToString:@"Sad"]) { [segue.destinationViewController setHappiness:(int)sadnessValue :segue.identifier]; currentTotal = [segue.destinationViewController setTotalValue:happinessValue]; [appDelegate.data setObject:(NSString *)[NSString stringWithFormat: @"Value: %i", sadnessValue] forKey:@"Value"]; } NSLog(@"Current Total: %i", currentTotal); [appDelegate.data setObject:[NSString stringWithFormat:@"%d", currentTotal] forKey:@"Total"]; NSLog(@"Total stored: %i", (int)[appDelegate.data valueForKey:@"Total"]); } } </code></pre>
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