Question

我正在尝试将此分区表设置为在不同的部分显示不同的JSON数组但由于某种原因，如果我在第一部分后的任何部分中有更大的行数，我得到[__NSArrayM objectAtIndex：]：索引3超出界限[0 .. 2]。这就是我如何设置每个部分的行数，在viewdidload上设置数组，并且在我填充所有数组后调用重新加载

[self.tableView performSelectorOnMainThread:@selector(reloadData) withObject:nil waitUntilDone:YES];

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

switch (section) {
    case 0:
        return [_team1 count];
        break;

    case 1:
        return [_team2 count];
        break;
    case 2:
        return [_team3 count];
        break;
    case 3:
        return [_team4 count];
        break;
    case 4:
        return [_team5 count];
        break;

    default:
        return section;
        break;
}

}

对于cellForRowAtIndex，我有这个，Team1 - Team5是我用来从JSON填充数组的字典类：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

static NSString *CellIdentifier = @"Cell";
Team1 *team1= [_team1 objectAtIndex:indexPath.row];
Team2 *team2= [_team2 objectAtIndex:indexPath.row];
Team3 *team3= [_team3 objectAtIndex:indexPath.row];
Team4 *team4= [_team4 objectAtIndex:indexPath.row];
Team5 *team5= [_team5 objectAtIndex:indexPath.row];
cell = [tableView dequeueReusableCellWithIdentifier: CellIdentifier];
if (cell == nil) {
    [tableView registerNib:[UINib nibWithNibName:@"TeamCell" bundle:nil] forCellReuseIdentifier:@"Cell"];
    cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
}
isShowingDetails = NO;
for(UILabel *v in cell.details)
{
    v.alpha = 0;
}
cell.clipsToBounds = YES;


cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.accessoryType = UITableViewCellAccessoryNone;

if(indexPath.section == 0){
    [cell.name setText:team1.name];
    [cell.institute setText:team1.institute];
    [cell.line setText:team1.line];
    [cell.email setText:team1.email];
    [cell.mobile setText:team1.mobile];
    [cell.postal setText:team1.postal];
    [cell.instituteAdd setText:team1.office];
    [cell.instituteWeb setText:team1.web];
    [cell.linkedWeb setText:team1.link];

}
if(indexPath.section == 1)
{
    [cell.institute setText:team2.institute];
    [cell.line setText:team2.line];
    [cell.email setText:team2.email];
    [cell.mobile setText:team2.mobile];
    [cell.postal setText:team2.postal];
    [cell.instituteAdd setText:team2.office];
    [cell.instituteWeb setText:team2.web];
    [cell.linkedWeb setText:team2.link];
}

if(indexPath.section == 2)
{
    [cell.institute setText:team3.institute];
    [cell.line setText:team3.line];
    [cell.email setText:team3.email];
    [cell.mobile setText:team3.mobile];
    [cell.postal setText:team3.postal];
    [cell.instituteAdd setText:team3.office];
    [cell.instituteWeb setText:team3.web];
    [cell.linkedWeb setText:team3.link];
}
if(indexPath.section == 3)
{
    [cell.institute setText:team4.institute];
    [cell.line setText:team4.line];
    [cell.email setText:team4.email];
    [cell.mobile setText:team4.mobile];
    [cell.postal setText:team4.postal];
    [cell.instituteAdd setText:team4.office];
    [cell.instituteWeb setText:team4.web];
    [cell.linkedWeb setText:team4.link];
}

if(indexPath.section == 4)
{
    [cell.institute setText:team5.institute];
    [cell.line setText:team5.line];
    [cell.email setText:team5.email];
    [cell.mobile setText:team5.mobile];
    [cell.postal setText:team5.postal];
    [cell.instituteAdd setText:team5.office];
    [cell.instituteWeb setText:team5.web];
    [cell.linkedWeb setText:team5.link];
}






cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

return cell;

}

Answer 1

这是因为您从切换部分中检索了Team的详细信息。把它移到里面。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

static NSString *CellIdentifier = @"Cell";

cell = [tableView dequeueReusableCellWithIdentifier: CellIdentifier];
if (cell == nil) {
    [tableView registerNib:[UINib nibWithNibName:@"TeamCell" bundle:nil] forCellReuseIdentifier:@"Cell"];
    cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
}
isShowingDetails = NO;
for(UILabel *v in cell.details)
{
    v.alpha = 0;
}
cell.clipsToBounds = YES;


cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.accessoryType = UITableViewCellAccessoryNone;

if(indexPath.section == 0){
    Team1 *team1= [_team1 objectAtIndex:indexPath.row];
    [cell.name setText:team1.name];
    [cell.institute setText:team1.institute];
    [cell.line setText:team1.line];
    [cell.email setText:team1.email];
    [cell.mobile setText:team1.mobile];
    [cell.postal setText:team1.postal];
    [cell.instituteAdd setText:team1.office];
    [cell.instituteWeb setText:team1.web];
    [cell.linkedWeb setText:team1.link];

}
if(indexPath.section == 1)
{
    Team2 *team2= [_team2 objectAtIndex:indexPath.row];
    [cell.institute setText:team2.institute];
    [cell.line setText:team2.line];
    [cell.email setText:team2.email];
    [cell.mobile setText:team2.mobile];
    [cell.postal setText:team2.postal];
    [cell.instituteAdd setText:team2.office];
    [cell.instituteWeb setText:team2.web];
    [cell.linkedWeb setText:team2.link];
}

if(indexPath.section == 2)
{
    Team3 *team3= [_team3 objectAtIndex:indexPath.row];
    [cell.institute setText:team3.institute];
    [cell.line setText:team3.line];
    [cell.email setText:team3.email];
    [cell.mobile setText:team3.mobile];
    [cell.postal setText:team3.postal];
    [cell.instituteAdd setText:team3.office];
    [cell.instituteWeb setText:team3.web];
    [cell.linkedWeb setText:team3.link];
}
if(indexPath.section == 3)
{
    Team4 *team4= [_team4 objectAtIndex:indexPath.row];
    [cell.institute setText:team4.institute];
    [cell.line setText:team4.line];
    [cell.email setText:team4.email];
    [cell.mobile setText:team4.mobile];
    [cell.postal setText:team4.postal];
    [cell.instituteAdd setText:team4.office];
    [cell.instituteWeb setText:team4.web];
    [cell.linkedWeb setText:team4.link];
}

if(indexPath.section == 4)
{
    Team5 *team5= [_team5 objectAtIndex:indexPath.row];
    [cell.institute setText:team5.institute];
    [cell.line setText:team5.line];
    [cell.email setText:team5.email];
    [cell.mobile setText:team5.mobile];
    [cell.postal setText:team5.postal];
    [cell.instituteAdd setText:team5.office];
    [cell.instituteWeb setText:team5.web];
    [cell.linkedWeb setText:team5.link];
}

cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

return cell;

顺便说一下，当你为5个团队创建5个类而它们具有相同的属性并且代表相同的实体时，这不是优化的。如果你有超过5支队伍怎么办？想一想！希望有所帮助：）

Answer 2

这个错误非常明显：

Team1 *team1= [_team1 objectAtIndex:indexPath.row];
Team2 *team2= [_team2 objectAtIndex:indexPath.row];
Team3 *team3= [_team3 objectAtIndex:indexPath.row];
Team4 *team4= [_team4 objectAtIndex:indexPath.row];
Team5 *team5= [_team5 objectAtIndex:indexPath.row];

让我们说第4节（_team5）有3行0到2，而其他只有2行。最终，您的方法将被调用以获取第4节的第2行._team5在索引2处有一个对象，但其他团队不会，所以您崩溃了。

NSArray* teams = nil;
switch (indexPath.section) {
    case 0: teams = _team1; break;
    case 1: teams = _team2; break;
    case 2: teams = _team3; break;
    case 3: teams = _team4; break;
    case 4: teams = _team5; break;
}

等。

对于Team1，Team2，Team3，Team4，Team5，你真的没有不同的课程，对吗？我的意思是肯定不是吗？那太荒谬了。

numberOfRowsInSection count将所有节行设置为第一节计数

2 个答案: