将BOOL值转换为INT的正确方法？

Everytime when I tried to convert BOOL value into int. INT value is showing -8 for True and 0 for False. Ideally it should return 1 for true.

每当我尝试将BOOL值转换为int时。 INT值显示-8表示True，0表示False。理想情况下，它应返回1表示true。

I have tried all possible ways of conversion like

我已经尝试过所有可能的转换方式

int val=Info.isattachementDownloadable;
int val=[[NSString stringWithFormat:@"%d", Info.isattachementDownloadable] intValue];
int val=(int)Info.isattachementDownloadable;

where Info.isattachementDownloadable return BOOL

其中Info.isattachementDownloadable返回BOOL

In all ways its showing -8 for TRUE.

在所有方面，它显示-8为真。

Any suggestion ?

有什么建议吗？

5 个解决方案

#1

Maybe that will help(thought i don't know why it may be needed in the first place)

也许这会有所帮助（以为我不知道为什么可能首先需要它）

NSInteger i = @(YES).integerValue;

Hope that it helps you.

希望它能帮到你。

#2

It is much quicker to do it like this:

这样做要快得多：

BOOL myBool = YES;
int myInt = (myBool ? 1 : 0);

myInt will be 1 if myBool is YES, and 0 if myBool is NO.

如果myBool为YES，则myInt为1，如果myBool为NO，则为0。

#3

It is always possible to use the object-oriented wrapper around numeric primitives (e.g. C's int). So am I answering the question? both yes and no depending on your viewpoint. However, here is what I prefer to use when using BOOL as input:

始终可以在数字基元周围使用面向对象的包装器（例如C的int）。我在回答这个问题吗？是和否取决于您的观点。但是，这是我在使用BOOL作为输入时更喜欢使用的内容：

NSNumber *numval = [NSNumber numberWithBool:Info.isattachementDownloadable];

And if you really need to use the primitive datatype:

如果你真的需要使用原始数据类型：

int val = [numval intValue];

#4

BOOL myBool;    
int myInt;
if (myBool) myInt = 1;
else myInt = 0;

#5

You can just assign BOOL value to int since YES and NO are just shortcuts for 1 and 0. You can also perform maths operations on BOOLs. FYI, BOOLs can even hold values from -128 up to 127 since they are just typedefs for signed chars.

您可以将BOOL值分配给int，因为YES和NO只是1和0的快捷方式。您还可以对BOOL执行数学运算。仅供参考，BOOL甚至可以保持-128到127之间的值，因为它们只是签名字符的typedef。

BOOL someBool = YES;
int intFromBool = someBool;
NSLog(@"%d", intFromBool);

intFromBool -= YES;
NSLog(@"%d", intFromBool);

Reference: https://www.bignerdranch.com/blog/bools-sharp-corners/

参考：https：//www.bignerdranch.com/blog/bools-sharp-corners/

#1