如何在目标 C 中创建 2D NSArray 或 NSMutableArray? [英] How to create a 2D NSArray or NSMutableArray in objective C?

问题描述

我想问一下客观C的问题.我想在目标 C 中创建一个 2D NSArray 或 NSMutableArray.我应该怎么做?数组中存储的对象是 NSString *.非常感谢你.

I want to ask about the objective C question. I want to create a 2D NSArray or NSMutableArray in objective C. What should I do? The object stored in the array is NSString *. Thank you very mcuh.

推荐答案

这当然是可能的，但我认为值得注意的是 NSArrays 只能容纳 对象，不能容纳原始类型.

This is certainly possible, but i think it's worthy to note that NSArrays can only hold objects, not primitive types.

解决这个问题的方法是使用原始包装类型NSNumber.

The way to get around this is to use the primitive wrapper type NSNumber.

NSMutableArray *outer = [[NSMutableArray alloc] init];

NSMutableArray *inner = [[NSMutableArray alloc] init];
[inner addObject:[NSNumber numberWithInt:someInt]];
[outer addObject:inner];
[inner release];

//do something with outer here...
//clean up
[outer release];

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