UITableView的移动

Question

行

我有一些在NSMutableArray中的tableView包含类课程

@interface Lesson : NSObject <NSCoding>{ 

    NSString *time1; 
    NSString *time2; 
    NSString *predmet; 
    NSString *namPrepod; 
    NSString *zamet; 
} 

我在tableview中移动排...................... .................................................. .................................................. ......

- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath 
{ 
    if(segmentedControl.selectedSegmentIndex==0) 
    { 
    if(fromIndexPath.section==0) 
    { 
     NSMutableArray *r = [[Singleton sharedInstance].chetNedel.monday objectAtIndex:fromIndexPath.row]; 
     [[Singleton sharedInstance].chetNedel.monday removeObjectAtIndex:fromIndexPath.row]; 
     [[Singleton sharedInstance].chetNedel.monday insertObject:r atIndex:toIndexPath.row]; 
    } 
    if(fromIndexPath.section==1) 
    { 
     NSMutableArray *r = [[Singleton sharedInstance].chetNedel.tuesday objectAtIndex:fromIndexPath.row]; 
     [[Singleton sharedInstance].chetNedel.monday removeObjectAtIndex:fromIndexPath.row]; 
     [[Singleton sharedInstance].chetNedel.monday insertObject:r atIndex:toIndexPath.row]; 
    } 

，但是当我在程序中移动排我有这个线错误

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 
     .......... 
if(segmentedControl.selectedSegmentIndex==0) 
    { 
     time1 = [[[UILabel alloc] init] autorelease]; 
     time1.font = [UIFont fontWithName:@"Arial-BoldMT" size:13]; 
     time1.tag = tagtime1; 
     time1.backgroundColor = [UIColor clearColor]; 
     if(indexPath.section ==0) 
      time1.text =[(Lesson *) [[Singleton sharedInstance].chetNedel.monday objectAtIndex:indexPath.row] time1]; 
     if(indexPath.section ==1) 
      time1.text =[(Lesson *) [[Singleton sharedInstance].chetNedel.tuesday objectAtIndex:indexPath.row] time1]; 
     if(indexPath.section ==2) 
      time1.text =[(Lesson *) [[Singleton sharedInstance].chetNedel.wednesday objectAtIndex:indexPath.row] time1]; 
     if(indexPath.section ==3) 
      time1.text =[(Lesson *) [[Singleton sharedInstance].chetNedel.thirsday objectAtIndex:indexPath.row] time1]; 
     if(indexPath.section ==4) 
      time1.text =[(Lesson *) [[Singleton sharedInstance].chetNedel.friday objectAtIndex:indexPath.row] time1]; 
     if(indexPath.section ==5) 
      time1.text =[(Lesson *) [[Singleton sharedInstance].chetNedel.saturday objectAtIndex:indexPath.row] time1]; 
     time1.frame = CGRectMake(8, 12, 300-124, 11); 
    ........... 
[cell.contentView addSubview:time1]; 

我做错了什么？

Answer 1

你准确得到了什么错误？看看你的代码，但我认为这个问题发生在你执行removeObjectAtIndex后跟insertObject：atIndex :.删除对象之后，将重新计算数组的索引，现在数组中的对象减少了1个。所以，如果你那么做insertObject：atIndex不降低，你想把它的索引，你不会，你想用它结束了。我建议你将两行合并为一行并使用exchangeObjectAtIndex：withObjectAtIndex：来代替。这里的更新代码：

if(fromIndexPath.section==0) 
{ 
    [[Singleton sharedInstance].chetNedel.monday exchangeObjectAtIndex:fromIndexPath.row withObjectAtIndex:toIndexPath.row]; 
} 
if(fromIndexPath.section==1) 
{ 
    [[Singleton sharedInstance].chetNedel.tuesday exchangeObjectAtIndex:fromIndexPath.row withObjectAtIndex:toIndexPath.row]; 
} 

Answer 2

我不找你的错误，但我认为你必须使用一个自定义的UITableViewCell，而不是在每一行添加一个UILabele ......因为细胞被回收和时间1可能已经存在。