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

注意，在Swift中，你可以这样做

let testBool: Bool = true
NSLog("testBool = %@", testBool.description)

这将记录testBool = true

//assuming b is BOOL. ternary operator helps us in any language.
NSLog(@"result is :%@",((b==YES)?@"YES":@"NO"));

在Swift中，你可以简单地打印一个布尔值，它将显示为true或false。

let flag = true
print(flag) //true

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

%d, 0为假，1为真。

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

or

NSLog(@"bool %s", b ? "true" : "false");

基于数据类型%@的变化如下

For Strings you use %@
For int  you use %i
For float and double you use %f