NSMutableArray *no1=[[NSMutableArray alloc]init];
NSMutableArray *no2=[[NSMutableArray alloc]init];
for(int i=0;i<3;i++)
{
for (int j=0;j<=i;j++)
{
NSString *no_str=[NSString stringWithFormat:@"%d",j];
[no1 addObject:no_str];
}
[no2 addObject:no1];
[no1 removeAllObjects];
}
NSLog(@"Final:%@",no2);
实际输出是:
( ( 0, 1, 2 ), ( 0, 1, 2 ), ( 0, 1, 2 ) )
期望输出是:
( ( 0 ), ( 0, 1 ), ( 0, 1, 2 ) )
NSMutableArray *no1;
NSMutableArray *no2=[[NSMutableArray alloc]init];
for(int i=0;i<3;i++)
{
no1=[[NSMutableArray alloc]init];
for (int j=0;j<=i;j++)
{
NSString *no_str=[NSString stringWithFormat:@"%d",j];
[no1 addObject:no_str];
}
[no2 addObject:no1];
[no1 release];
}
NSLog(@"Final:%@",no2);
如果你用的ARC,我的代码可以帮忙
NSMutableArray *no1;
NSMutableArray *no2=[[NSMutableArray alloc]init];
for(int i=0;i<3;i++)
{
no1=[[NSMutableArray alloc]init];
for (int j=0;j<=i;j++)
{
NSString *no_str=[NSString stringWithFormat:@"%d",j];
[no1 addObject:no_str];
}
[no2 addObject:no1];
}
NSLog(@"Final:%@",no2);
在我这里输出结果就是:
( (
0
),
(
0,
1
),
(
0,
1,
2
) )