Passing NSInteger variable to NSMutableDictionary or NSMutableArray

iphone, objective-c

Solution

`NSInteger` isn't an object -- it's simply typecast to `int` on 32-bit or `long` on 64-bit. Since `NSDictionary` can only store objects, you need to wrap the integer into an object before you can store it. Try this:

NSInteger temp = 20;
[userSettingsFromFile setObject:[NSNumber numberWithInteger:temp] 
                         forKey:@"aTemp"];

Problem

Why does this not work: ``` NSInteger temp = 20; [userSettingsFromFile setObject:temp forKey:@"aTemp"]; ``` but this does: ``` [userSettingsFromFile setObject:@"someObject" forKey:@"aTemp"]; ``` How can I use the `NSInteger` variable?

Original source