Is there a format specifier that works with Boolean values?

Question

I want to do something like this:

NSLog(@\"You got: %x\", booleanValue);

where x is the specifier. But I can\'t find one! I want to avoid:

Answer 1

For os_log use

os_log("results in true/false: %{bool}d", myBool)
os_log("results in YES/NO: %{BOOL}d", myBool)

If you are on the latest OS, you can also use string interpolation. For more info look at Format Custom Values in Message Strings

Answer 2

Here are two things that work:

NSLog(@"You got: %@",booleanValue ? @"YES" : @"NO");

or you can cast:

NSLog(@"You got: %d", (int)booleanValue);

Which will output 0 or 1

Answer 3

There's no format specifier that I know of. You can do this:

NSLog(@"You got: %@", (booleanValue ? @"YES" : @"NO"));

Alternately, you could write a little function or macro using the logic above that takes a BOOL and returns the appropriate string. You can then use that function in your log statements.

Answer 4

On Swift, use String(describing: booleanValue)

For example: os_log("You got %@", log: .default, type: .debug, String(describing: booleanValue))

Answer 5

You can cast it to an int and use %d:

NSLog(@"You got: %d", (int)booleanValue);

Or use something like this:

NSLog(@"You got: %@", booleanValue ? @"YES" : @"NO");

Answer 6

Yes

Here is the code:

NSLog(@"%hhd",BOOLvariable);

Prints 1 for Yes and 0 for No. Worked for me.