Passing NSInteger variable to NSMutableDictionary or NSMutableArray

Question

Why does this not work:

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

but this does:

[userS         


        

Answer 1

Whatever you pass through setObject has to be derived from NSObject. NSInteger is not, it's a simple int typedef. In your 2nd example you use NSString, which is derived from NSObject.