objective-c 多维数组

Question

我想在我的应用程序中使用可变大小的多维数组来保存数据。我要使用的数据结构如下，每行的第一个元素后面跟着相应的多个值。

 array = {   {a, a_val1, a_val2, a_val3}.  
             {b, b_val1},  
             {c, c_val1, c_val2, c_val3, c_val4, c_val5}  
         }

知道如何在 objective-c 中实现吗？

Answer 1

像这样使用 NSMutableArray

NSMutableArray *curRow; /* use to access the row while loading with objects */
NSMutableArray *array = [[NSMutableArray alloc] init]; /* your main multidim array */
curRow = [NSMutableArray array];
[curRow addObject:/* what you want here */];
[curRow addObject:/* what you want here */];
[curRow addObject:/* what you want here */];
[array addObject:curRow]; /* first row is added */

/* rinse and repeat */
curRow = [NSMutableArray array];
[curRow addObject:/* what you want here */];
[curRow addObject:/* what you want here */];
[curRow addObject:/* what you want here */];
[array addObject:curRow];