有办法打印值布尔标志在NSLog?


当前回答

苹果的FixIt提供了%hhd,它正确地给了我BOOL的值。

其他回答

NSArray *array1 = [NSArray arrayWithObjects:@"todd1", @"todd2", @"todd3", nil];
bool objectMembership = [array1 containsObject:@"todd1"];
NSLog(@"%d",objectMembership);  // prints 1 or 0

布尔值只是整数,它们只是类型转换的值,比如……

typedef signed char     BOOL; 

#define YES (BOOL)1
#define NO (BOOL)0

BOOL value = YES; 
NSLog(@"Bool value: %d",value);

如果输出为1,则为YES,否则为NO

苹果的FixIt提供了%hhd,它正确地给了我BOOL的值。

你可以这样做:

BOOL flag = NO;
NSLog(flag ? @"YES" : @"NO");

直接将bool值打印为整数

BOOL curBool = FALSE;
NSLog(@"curBool=%d", curBool);

- > curBool = 0

将bool类型转换为字符串

char* boolToStr(bool curBool){
    return curBool ? "True": "False";
}

BOOL curBool = FALSE;
NSLog(@"curBool=%s", boolToStr(curBool));

- > curBool =虚假