%@

Objective-C object, printed as the string returned by?descriptionWithLocale:?if available, or?description?otherwise. Also works with?CFTypeRef?objects, returning the result of the?CFCopyDescription?function.

%%

'%'?character.

%d,?%D

Signed 32-bit integer (int).

%u,?%U

Unsigned 32-bit integer (unsigned int).

%x

Unsigned 32-bit integer (unsigned int), printed in hexadecimal using the digits 0–9 and lowercase a–f.

%X

Unsigned 32-bit integer (unsigned int), printed in hexadecimal using the digits 0–9 and uppercase A–F.

%o,?%O

Unsigned 32-bit integer (unsigned int), printed in octal.

%f

64-bit floating-point number (double).

%e

64-bit floating-point number (double), printed in scientific notation using a lowercase e to introduce the exponent.

%E

64-bit floating-point number (double), printed in scientific notation using an uppercase E to introduce the exponent.

%g

64-bit floating-point number (double), printed in the style of?%e?if the exponent is less than –4 or greater than or equal to the precision, in the style of?%f?otherwise.

%G

64-bit floating-point number (double), printed in the style of?%E?if the exponent is less than –4 or greater than or equal to the precision, in the style of?%f?otherwise.

%c

8-bit unsigned character (unsigned char), printed by?NSLog()?as an ASCII character, or, if not an ASCII character, in the octal format?\\ddd?or the Unicode hexadecimal format\\udddd, where?d?is a digit.

%C

16-bit Unicode character (unichar), printed by?NSLog()?as an ASCII character, or, if not an ASCII character, in the octal format?\\ddd?or the Unicode hexadecimal format?\\udddd, where?d?is a digit.

%s

Null-terminated array of 8-bit unsigned characters. Because the?%s?specifier causes the characters to be interpreted in the system default encoding, the results can be variable, especially with right-to-left languages. For example, with RTL,?%s?inserts direction markers when the characters are not strongly directional. For this reason, it’s best to avoid?%s?and specify encodings explicitly.

%S

Null-terminated array of 16-bit Unicode characters.

%p

Void pointer (void *), printed in hexadecimal with the digits 0–9 and lowercase a–f, with a leading?0x.

%a

64-bit floating-point number (double), printed in scientific notation with a leading?0x?and one hexadecimal digit before the decimal point using a lowercase?p?to introduce the exponent.

%A

64-bit floating-point number (double), printed in scientific notation with a leading?0X?and one hexadecimal digit before the decimal point using a uppercase?P?to introduce the exponent.

%F

64-bit floating-point number (double), printed in decimal notation.

h

Length modifier specifying that a following?d,?o,?u,?x, or?X?conversion specifier applies to ashort?or?unsigned short?argument.

hh

Length modifier specifying that a following?d,?o,?u,?x, or?X?conversion specifier applies to asigned char?or?unsigned char?argument.

l

Length modifier specifying that a following?d,?o,?u,?x, or?X?conversion specifier applies to along?or?unsigned long?argument.

ll,?q

Length modifiers specifying that a following?d,?o,?u,?x, or?X?conversion specifier applies to along long?or?unsigned long long?argument.

L

Length modifier specifying that a following?a,?A,?e,?E,?f,?F,?g, or?G?conversion specifier applies to a?long double?argument.

z

Length modifier specifying that a following?d,?o,?u,?x, or?X?conversion specifier applies to asize_t?or the corresponding signed integer type argument.

t

Length modifier specifying that a following?d,?o,?u,?x, or?X?conversion specifier applies to aptrdiff_t?or the corresponding unsigned integer type argument.

j

Length modifier specifying that a following?d,?o,?u,?x, or?X?conversion specifier applies to aintmax_t?or?uintmax_t?argument.

NSInteger

%ld?or?%lx

Cast the value to?long.

NSUInteger

%lu?or?%lx

Cast the value to?unsigned long.

CGFloat

%f?or?%g

%f?works for floats and doubles when formatting; but note the technique described below for scanning.

CFIndex

%ld?or?%lx

The same as?NSInteger.

pointer

%p?or?%zx

%p?adds?0x?to the beginning of the output. If you don't want that, use%zx?and no typecast.