我试图从 UITextField 中保存某些值,但是我无法做到这一点,因为每当我滚动时,UITextField 中什么都没有。我正在使用自定义单元格。我知道自定义单元格必须加载到特定视图中,因此我使用 textFieldDidEndEditing 将值存储在数组中。但是,我收到以下错误消息: * 由于未捕获的异常 'NSInvalidArgumentException' 导致应用程序终止,原因:'* -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
非常感谢您的帮助!我的代码在下面,我在 IOS 开发中很新。
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.section == 0) {
if (indexPath.row == 7) {
static NSString *CellIdentifier = @"RevButtonCell";
RevButtonCell *cell = (RevButtonCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"RevButtonCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
[cell.revsaveB addTarget:self action:@selector(revaddparse:) forControlEvents:UIControlEventTouchUpInside];
cell.reveditdeleteB.hidden = YES;
cell.reveditsaveB.hidden = YES;
cell.revsaveB.hidden = NO;
cell.revdeleteB.hidden = NO;
}
return cell;
} else {
static NSString *CellIdentifier = @"TextCell";
TextCell *cell = (TextCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"TextCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
cell.detaillabel.text = [revdetailsA objectAtIndex:indexPath.row];
cell.detailtext.placeholder = @"Enter Text";
cell.detailtext.tag = indexPath.row;
cell.detailtext.delegate = self;
if (indexPath.row == 0) {
cell.detailtext.text = dateS;
}
if (indexPath.row == 1) {
cell.detailtext.text = clientS;
}
if (indexPath.row == 2) {
cell.detailtext.text = productS;
}
if (indexPath.row == 3) {
cell.detailtext.text = amountS;
}
if (indexPath.row == 4) {
cell.detailtext.text = qtyS;
}
if (indexPath.row == 5) {
cell.detailtext.text = taxS;
}
if (indexPath.row == 6) {
cell.detailtext.text = totalS;
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;
}
}
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
[client insertObject:clientS atIndex:0];
[product insertObject:productS atIndex:0];
[date insertObject:dateS atIndex:0];
[amount insertObject:amountS atIndex:0];
[qty insertObject:qtyS atIndex:0];
[tax insertObject:taxS atIndex:0];
[total insertObject:totalS atIndex:0];
}