objective-c - 如何在 Objective C 中生成二维数组

Question

我如何生成这样的二维 NSMutable 数组:

数组:

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

到目前为止，我只成功完成了 [item1]=>[item1a,item1b,item1c...]

当我尝试添加更多二维数组时，它会一直覆盖第一行。

Answer 1

创建 NSMutableArray 并将 NSMutableArray 作为对象分配给它。

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];