如何将 Struct 包装到 NSObject 中 [英] How to wrap a Struct into NSObject

问题描述

这应该是微不足道的......我想，但我找不到如何将 Struct 变量包装到 NSObject 的方法.有没有办法这样做?如果没有，我将如何将结构添加到 NSMutableArray 中?

this is supposed to be trivial… I think, but I can't find a way how to wrap a Struct variable into an NSObject. Is there a method to do so? If not, how would I go about adding a struct into an NSMutableArray?

谢谢.

推荐答案

嗯，试着看看 https://developer.apple.com/documentation/foundation/nsvalue

Hm, try to look at the NSValue at https://developer.apple.com/documentation/foundation/nsvalue

你可以像这样使用

struct aStruct
{
    int a;
    int b;
};
typedef struct aStruct aStruct;

然后将它包装"到一个 NSValue 对象中，例如:

Then sort of "wrap" it to an NSValue object like:

aStruct struct; struct.a = 0; struct.b = 0;
NSValue *anObj = [NSValue value:&struct withObjCType:@encode(aStruct)];
NSArray *array = @[anObj];

要从 NSValue 中提取结构体，请使用:

To pull the struct out from NSValue use:

NSValue *anObj = [array firstObject];
aStruct struct;
[anObj getValue:&struct];

我想稍后，您可以从 NSValue 中获得一个类别以使其更好=D

I guess later on, you can have a category from NSValue to make that better =D

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