What formatter is used for boolean values?
EDIT:
Example: NSLog(@" ??", BOOL_VAL);, what is ?? ?
views:
650answers:
4
+3
A:
One way to do it is to convert to strings (since there are only two possibilities, it isn't hard):
NSLog(@" %s", BOOL_VAL ? "true" : "false");
I don't think there is a format specifier for boolean values.
Michael Myers
2010-04-08 22:18:55
Shouldn't the output strings be: "Yes" and "No" :P
Ben S
2010-04-08 22:22:12
Or "Cake" and "No cake". Whatever suits you.
Michael Myers
2010-04-08 22:23:40
@mmyers: I love cake and no cake! I am going to replace all my x?@"YES":@"NO" code with x?@"Cake":@"No Cake" immediately :D -- well, at least for my object descriptions anyway ;)
Jason Coco
2010-04-08 23:26:05
Or TheCakeIsALie and TheCakeIsNotALie.
Warren P
2010-04-09 13:46:31
+2
A:
I would recommend
NSLog(@"%@", boolValue ? @"YES" : @"NO");
because, um, BOOLs are called YES or NO in Objective-C.
Yuji
2010-04-08 22:22:00
It seems an obvious utility spot for a macro or a function (if only to avoid the propagation of string literals throughout the app).
Warren P
2010-04-09 13:48:39
+1
A:
In Objective-C, the BOOL type is just a signed char. From <objc/objc.h>:
typedef signed char BOOL;
#define YES (BOOL)1
#define NO (BOOL)0
So you can print them using the %d formatter But that will only print a 1 or a 0, not YES or NO.
Or you can just use a string, as suggested in other answers.
mipadi
2010-04-08 22:23:48
A:
Format strings for use with NSLog and [NSString stringWithFormat] are documented here:
BOOL/bool/boolean are not even mentioned...
DLRdave
2010-04-08 22:25:45