如何在Objective C中生成二维数组 [英] How to produce 2 dimensional Array in Objective C

问题描述

如何生成2维NSMutable数组：

How do i produce a 2 dimensional NSMutable array as this:

数组：

=>[item1]=>[item1a,item1b,item1c...]
=>[item2]=>[item2a,item2b,item2c...]
...
=>[item10]=>[item10a,item10b,item10c...]

到目前为止，我只是成功了[item1] => [item1a，item1b，item1c ...]

So far i've only been successful up to the [item1]=>[item1a,item1b,item1c...]

当我尝试添加更多2维数组，它会一直覆盖第一行。

When i try to add more 2 dimensional array it keeps overriding the first row.

推荐答案

创建 NSMutableArray 并将 NSMutableArray 指定给它作为对象。

Create NSMutableArray and assign NSMutableArrays to it as its objects.

例如：

NSMutableArray * myBig2dArray = [[NSMutableArray alloc] init];

// first internal array
NSMutableArray * internalElement = [[[NSMutableArray alloc] init] autorelease];
[internalElement addObject:@"First - First"];
[internalElement addObject:@"First - Second"];
[myBig2dArray addObject:internalElement];

// second internal array
internalElement = [[[NSMutableArray alloc] init] autorelease];
[internalElement addObject:@"Second - First"];
[internalElement addObject:@"Second - Second"];
[myBig2dArray addObject:internalElement];

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