对按时间先后顺序的列表按同一天进行分组

来源：互联网发布：c语言多个else if 编辑：程序博客网时间：2024/05/17 08:41
实现代码：

- (NSMutableArray *)reGroupDataSoure:(NSArray *)originArr{    NSDateFormatter *dateFmt = [[NSDateFormatter alloc] init];    [dateFmt setDateFormat:@"yyyy-MM-dd"];    NSMutableArray *groupsArr = [NSMutableArray new];    int i = 0;    int j;    for (;i < [originArr count] - 1;) {        NSMutableArray *sameArr = [NSMutableArray new];        NSDictionary *dic = [originArr objectAtIndex:i];        [sameArr addObject:dic];        long long ct = [[dic objectForKey:@"ct"] longLongValue];        NSDate *ctDate = [NSDate dateWithTimeIntervalSince1970:ct/1000];        NSString *ctString = [dateFmt stringFromDate:ctDate];        //NSLog(@"day -- %@",ctString);        j = i + 1;<p class="p1"><span class="s1"><span style="white-space:pre"></span>if</span><span class="s2"> (j == [<span style="font-family: Arial, Helvetica, sans-serif;">originArr   </span></span><span class="s4">count</span><span class="s2">]) {</span></p><p class="p1"><span class="s2">            </span><span class="s1">if</span><span class="s2"> (j == </span><span class="s5">1</span><span class="s2">) {</span></p><p class="p2"><span class="s6">                </span><span class="s2">//</span><span class="s7">只有一个元素</span></p><p class="p3"><span class="s6">                [<span style="font-family: Arial, Helvetica, sans-serif;">groupsArr  </span></span><span class="s4">addObject</span><span class="s6">:</span><span class="s2">originArr</span><span class="s6">];</span></p><p class="p1"><span class="s2">            }</span></p><p class="p1"><span class="s2">            </span><span class="s1">return groupsArr</span><span class="s2">;</span></p><p class="p1"><span class="s2">        }</span></p>        for (; j < [originArr count];) {            NSDictionary *jDic = [originArr objectAtIndex:j];            long long jct = [[jDic objectForKey:@"ct"] longLongValue];            NSDate *jctDate = [NSDate dateWithTimeIntervalSince1970:jct/1000];            NSString *jctString = [dateFmt stringFromDate:jctDate];            if ([jctString isEqualToString:ctString]) {                //同一组                [sameArr addObject:jDic];                j++;                if (j == [originArr count]) {                    [groupsArr addObject:sameArr];                    return groupsArr;                }            }            else            {                i = j;                [groupsArr addObject:sameArr];                break;            }        }    }    return groupsArr;}
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