<span style="font-size:24px;"> NSMutableArray *arr = [[NSMutableArray alloc] init];
for (int i = 0; i < 13; i++) {
[arr addObject:[NSString stringWithFormat:@"shenzhou%dhao", i+ 1]];
}
NSLog(@"%@",arr);
<span style="color:#FF0000;">//分组</span>
NSMutableArray *bigArr = [[NSMutableArray alloc] initWithCapacity:1];
NSMutableArray *smallArr = nil;
for (int i = 0; i < [arr count]; i++) {
if (i % 3 == 0) {
<span style="color:#FF0000;">//只要读到0 3 6 9 12,就开辟空间存储接下来的三个元素</span>
smallArr = [[NSMutableArray alloc] initWithCapacity:1];
<span style="color:#FF0000;">//将小数组添加到大数组中进行管理</span>
[bigArr addObject:smallArr];
}
[smallArr addObject:[arr objectAtIndex:i]];
}
NSLog(@"%@",bigArr);
</span></span>