objective c- MutableArray怎麼復制最後三個字符？

MutableArray怎麼復制最後三個字符？

怎麼樣把MutableArray中的最後三個字符復制到另外的MutableArray中？

 MutableArray1:(
           "22.298166 , 73.165809",
           "22.300598 , 73.167183",
           "22.298101 , 73.166188",
           "22.298128 , 73.166194"
           "22.298130 , 73.166194"
          )

O(∩_∩)O謝謝

最佳回答：

用NSArray的subarrayWithRange:

NSRange range = NSMakeRange([mutableArray1 count] - 3, 3);
NSMutableArray *mutableArray2 = [NSMutableArray arrayWithArray:
                                  [mutableArray1 subarrayWithRange:range]];