Objective-C的访问阵列 [英] objective-c accessing arrays

问题描述

我做了以下尝试创建二维和三维数组：

I have done the following trying to create 2d and 3d arrays:

Array1 = [[NSMutableArray alloc]init];
Array2 = [[NSMutableArray alloc]init];
Array3 = [[NSMutableArray alloc]init];

for loop 
[Array1 insertObject:Array2 atIndex:i];
//some code....
[Array2 insertObject:Array3 atIndex:j];

林不知道这是否是正确的，但在我的code我每次循环我添加ARRAY2到数组1的新指标，但即时通讯注意如果确定这个工程。换句话说，我希望我不是再次每次移动整个数组？！

im not sure if this is right but every time i loop in my code i add Array2 to a new index in Array1 but im note sure if this works. In other words i hope im not moving the whole array again every time ?!!

现在我的问题是，我需要通过ARRAY1循环访问数组2，然后通过数组2 ARRAY3。我只需要知道如何使用循环，这样我可以显示每个阵列的内容，以访问这些阵列。我需要做的是这样的数组[我] [J]。
 其中，i表示了array1和J是数组2

Now my problem is that i need to access array2 through looping in array1, then array3 through array2. I just need to know how to access these arrays using loops so that i can display each array's contents. I need to do something like this array [i][j] where "i" for array1 and "j" is for array2

推荐答案

创建三维阵列（NxMxP）：

Create 3d-array (NxMxP):

NSMutableArray *array3D = [[NSMutableArray alloc] initWithCapacity:N];

for (int i = 0; i < N; ++i)
{
    NSMutableArray *array2D = [[NSMutableArray alloc] initWithCapacity:M];
    for (int i = 0; i < M; ++i)
    {
        NSMutableArray *justAnArray = [[NSMutableArray alloc] initWithCapacity:P];
        [array2D addObject:justAnArray];
        [justAnArray release];
    }
    [array3D addObject:array2D];
    [array2D release];
}

使用此生物：

[[[array3D objectAtIndex:3] objectAtIndex:4] objectAtIndex:1]; // it's like array3D[3][4][1]

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