如何在 Objective C 中构建多维对象数组 [英] How to Build a MultiDimensional Array of Objects in Objective C

问题描述

可能的重复:
如何创建多维数组?

我是编程和目标 C 的新手，所以虽然我在这里发现了一些讨论多维数组的问题，但我不太明白我需要做什么来构建和使用我自己的数组.

I'm new to programming and objective C, so although I have found a few questions on here that discuss multidimensional arrays, I'm not quite getting what I need to do in order to build and use my own.

我需要制作一个有 16 行 3 列的数组.该数组需要接受字符串对象.我不知道如何创建、填充或访问其内容.有没有好心人帮我分解一下?

I need to make an array that has 16 rows and 3 columns. The array needs to accept string objects. I do not know how to create this, fill it, or access its contents. Would anyone be kind enough to break it down for me?

推荐答案

我建议您使用 C 数组，因为 NSArray 不支持多维.你可以像这样声明你描述的数组:

I'd suggest you use a C-array, as an NSArray doesn't support multiple dimensions. You could declare the array you described like this:

NSString *stringArray[16][3];

设置和访问该数组的任何字符串非常简单:

Setting and accessing any string of this array is quite straight-forward:

stringArray[7][1] = @"Stringstringstring";

NSString *string = stringArray[3][0];

但是，您可以使用 NSArray(或 NSMutableArray)，但这会不太优雅:

However, you could use an NSArray (or NSMutableArray), but that would be a bit less elegant:

NSArray *stringArray = [NSArray arrayWithObjects:
                        [NSMutableArray array],
                        [NSMutableArray array],
                        [NSMutableArray array], nil];

这三个 NSMutableArray 将是二维数组的三列.

Those three NSMutableArrays would be the three columns of your two-dimensional array.

编辑

使用 NSArray，使用循环来填充它可能更容易:

Using an NSArray, it might be easier to use a loop to fill it:

NSMutableArray *stringArray = [NSMutableArray array];

for (int column = 0; column < 3; column++)
{
    NSMutableArray *columnArray = [NSMutableArray array];

    for (int row = 0; row < 16; row++)
        [columnArray addObject:[NSString stringWithFormat:@"Row %i, column %i", row, column]];

    [stringArray addObject:columnArray];
}

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