客观的C 2维数组？ [英] objective c 2-dimensional array?

问题描述

我有一点麻烦创建一个动态分配的二维数组。如果它的确与众不同，我编码IOS。

I am having a bit of trouble creating a dynamically allocated two-dimensional array. If it makes a difference I am coding for ios.

我有点新的客观c和该语言的内存分配比较混乱。我做了一些研究，并拿出的NSMutableArray而这个链接，目标C 二维数组，但我仍然感到困惑。

I am a bit new to objective c and the memory allocation in this language is a bit confusing. I did a bit of research and come up with NSMutableArray and this link, 2d arrays in objective c, but am still confused.

我所希望做的是创造行和colunms的列表，包含列对象的动态创建的数字每一行。行数也是动态的。

What I am looking to do is create a list of rows and colunms, each row containing a dynamically created number of column objects. The number of rows is also dynamic.

如果您想布局作为哈希映射;图形，每个散列细胞将包含一个按钮，并在屏幕上显示的标签

If you think of the layout as a a hash map; graphically, each hash cell will contain a button and a label displayed on the screen.

编辑：

我有，

NSMutableArray *rows;
NSMutableArray *columns;

- (void)viewDidLoad {
    rows = [[NSMutableArray alloc] init];
    columns = [[NSMutableArray alloc] init];

    //allocate memory?
}

我的主要问题是如何分配的内存为每个条目？

My main question is how to allocate the memory for each entry?

EDIT2：

如果有人需要帮助，这我得到了答案，并期待更多的字典，而不是数组，他们有很多有用的方法。

If anyone needed help with this I got the answer and look more to dictionaries instead of Arrays, they have lots of helpful methods.

推荐答案

您不能创建Objective-C的2维数组，但你可以使用C风格的数组，例如：

You cannot create 2 dimensional array with objective-c but you can use c style array, for example:

@implementation TwoDimCArray
{
    NSUInteger _array[8][8];
}

- (id)init
{
    if (self = [super init]){
        [self clearArray];
    }
    return self;
}

- (int)cellStateAtColumn:(NSInteger)column andRow:(NSInteger)row
{
    return _array[column][row];
}

- (void)setCellState:(BoardCellState)state forColumn:(NSInteger)column andRow:(NSInteger)row
{
    _array[column][row] = state;
}

- (void) clearArray
{
    memset(_array, 0, sizeof(NSUInteger) * 8 * 8);
}
@end

当你嵌入到另一个NSArray的NSArray中进行比较它的工作原理非常快。
希望它帮助。

It works very quick when you compare it with NSArray embedded in another NSArray. Hope it help.

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