|
Specifier |
Description |
|
%@ |
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, %i |
Signed 32-bit integer (int) |
|
%u, %U |
Unsigned 32-bit integer (unsigned int) |
|
%hi |
Signed 16-bit integer (short) |
|
%hu |
Unsigned 16-bit integer (unsigned short) |
|
%qi |
Signed 64-bit integer (long long) |
|
%qu |
Unsigned 64-bit integer (unsigned long long) |
|
%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 |
|
%qx |
Unsigned 64-bit integer (unsigned long long), printed in hexadecimal using the digits 0–9 and lowercase a–f |
|
%qX |
Unsigned 64-bit integer (unsigned long long), 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. %s interprets its input in the system encoding rather than, for example, UTF-8. |
|
%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 |
|
%L |
Length modifier specifying that a following a, A, e, E, f, F, g, or G conversion specifier applies to a long double argument |
|
%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 |
|
%z |
Length modifier specifying that a following d, i, o, u, x, or X conversion specifier applies to a size_t or the corresponding signed integer type argument |
|
%t |
Length modifier specifying that a following d, i, o, u, x, or X conversion specifier applies to a ptrdiff_t or the corresponding unsigned integer type argument |
|
%j |
Length modifier specifying that a following d, i, o, u, x, or X conversion specifier applies to a intmax_t or uintmax_t argument |
|
%@
|
NSString類字符串
|
|
%d, %i
|
整數
|
|
%u,%z
|
無符整形
|
|
%f
|
浮點/雙字
|
|
%x, %X
|
十六進制整數
|
|
%o
|
八進制整數
|
|
%zu
|
size_t
|
|
%p
|
|
|
%e
|
浮點/雙字 （科學計算）
|
|
%g
|
浮點/雙字
|
|
%s
|
C字符串
|
|
%.*s
|
Pascal字符串
|
|
%c
|
字符
|
|
%C
|
unichar
|
|
%lld
|
64位長整數（long long）
|
|
%llu
|
無符64位長整數
|
|
%Lf
|
64位雙字
|
| %hhd | BOOL布爾類型 |