目标c中的多维数组 [英] MultiDimensional Array in Objective c

问题描述

EveryBody ..

EveryBody..

我想在目标c中创建一个8 * 8维数组。

i want to create one 8*8 dimensional array in objective c..

(
[0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0],
)

就像那样..
并且还可以用作其中一个可以移动的对象..
喜欢想要移动

like that.. And also use as one of the object can moved in it.. Like want to move

MOVE_ARRAY = array([0, 0], [0, 2])

并检查阵列的任何位置，如5 * 6或4 * 3任何..
所以，任何人都可以帮助我如何初始化，以及如何在代码中使用？
谢谢。

And also check the array's any position like 5*6 or 4*3 any.. So, Can any one help me about how to initialize , and how to use in code ? Thanks.

推荐答案

在Objective-C中：

In Objective-C:

array = [[NSMutableArray alloc] init];

for (int i = 0; i < 8; i++) {
    NSMutableArray *subArray = [[NSMutableArray alloc] init];
    for (int j = 0; j < 8; j++) {
        [subArray addObject:[NSNumber numberWithInt:0]]; 
    }
    [array addObject:subArray];
    [subArray release];
}

（ array 是一个实例变量，必须添加到头文件并在您的 dealloc 方法中释放

(array is an instance variable, that has to be added to your header file and released in you dealloc method)

要检索某个位置的值你可以写一个这样的方法：

To retrieve a value at a certain position you could write a method like this:

- (int)valueAtRow:(int)row andColumn:(int)col {
    NSMutableArray *subArray = [array objectAtIndex:row];
    return [[subArray objectAtIndex:col] intValue];
}

===更新===

要删除一个对象，你可以这样做：

To remove an object you could do this:

- (void)removeObjectAtRow:(int)row andColumn:(int)col {
    NSMutableArray *subArray = [array objectAtIndex:row];
    [subArray removeObjectAtIndex:col];
}

你必须要小心，因为删除对象会改变结构数组（例如，删除对象的行在删除后只有7个项目。因此，您可能需要考虑保留结构的完整性，并将要删除的值设置为通常不使用的值：

You have to be careful though, because removing objects will change the structure of the array (e.g. the row where you removed an object will have only 7 items after the removal. So you might want to think about leaving the structure intact and set the values that you want to delete to a value that you normally don't use:

- (void)removeObjectAtRow:(int)row andColumn:(int)col {
    NSMutableArray *subArray = [array objectAtIndex:row];
    [subArray replaceObjectAtIndex:col withObject:[NSNumber numberWithInt:-999]];
}

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