问题描述

NSMutableArray 添加NSArray问题

不知道怎么使用NSMutableArray和NSArray。

代码：

for (int i=0; i<[DateSortArry2 count]; i++) {        for (int j=0; j<[DateSortArry2Copy count]; j++) {             NSString *sectiondateStr2 = [NSString stringWithFormat:@""%@""[DateSortArry2Copy objectAtIndex:j]];                if ([[DateSortArry2 objectAtIndex:i] isEqualToString:sectiondateStr2]) {                  [Arry addObject:sectiondateStr2];               }        }        [SumArry addObjectsFromArray:Arry];        [Arry removeAllObjects];    }

代码得到的结果：

SumArry:(20130227""20130227""20130227""20130226""20130226""20130226""20130225""20130225"")

要求的结果：

SumArry:((20130227""20130227""20130227""    )    (20130226""20130226""20130226""    )    (20130225""20130225""    ))

不知道应该怎么实现。

解决方案

NSString *str = @"""";for (int i=0; i<[DateSortArry2 count]; i++) {       if (str isEqualToString:[DateSortArry2 objectAtIndex:i])       {            return;       }       else       {            NSMutableArray * Arry = [[NSMutableArray alloc] init];            str = [DateSortArry2 objectAtIndex:i]            for (int j=0; j<[DateSortArry2Copy count]; j++)            {                if ([[DateSortArry2 objectAtIndex:i] isEqualToString:str])                {                    [Arry addObject:str];                }            }            [SumArry addObject:Arry];            [Arry removeAllObjects];        }}