Why does an NSInteger variable have to be cast to long when used as a format argument?

Question

NSInteger myInt = 1804809223;
NSLog(@\"%i\", myInt); <==== 

The code above produces an error:

Values of type \'NSInteger\

Answer 1

Instead of passing an NSInteger to NSLog, just pass an NSNumber. This will get around all the casts and choosing the right string format specifier.

NSNumber foo = @9000;
NSLog(@"foo: %@", foo);
NSInteger bar = 9001;
NSLog(@"bar: %@", @(bar));

It also works for NSUIntegers without having to worry about that. See answer to NSInteger and NSUInteger in a mixed 64bit / 32bit environment