我正在尝试从选定的表行创建一个数组,以便将其推送到新视图。我的问题是从数组中删除一个未选择的行,它会抛出索引超出边界的错误,尽管我选择了其他项目。
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//listOfItems is a Pre Populated Array for the table
NSString *cellValue = [listOfItems objectAtIndex:indexPath.row];
//the array i want my selected items to be added to
NSArray *array = names;
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
if (cell.accessoryType == UITableViewCellAccessoryNone) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
[names addObject:cellValue];
NSLog(@"ARRAY: %@", array);
}
else {
cell.accessoryType = UITableViewCellAccessoryNone;
[names removeObjectAtIndex:indexPath.row];
NSLog(@"ARRAY: %@", array);
}
[tableView deselectRowAtIndexPath:indexPath animated:NO];
}
}
如何在正在创建的数组中找到索引号,以便删除正确的值?任何帮助将不胜感激:-)谢谢!
----- -----解 这是另一种方式,以防其他人想知道。
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
NSString *selected = [listOfItems objectAtIndex:indexPath.row];
if (cell.accessoryType == UITableViewCellAccessoryNone) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
[names addObject:selected];
NSLog(@"ARRAY ADDED %@", names);
}
else {
cell.accessoryType = UITableViewCellAccessoryNone;
[names removeObject:selected];
NSLog(@"ARRAY DELETED %@", names);
}
答案 0 :(得分:1)
如果您打算将一组已检查的单元格值传递给视图,为什么要在每个单元格选择中添加和删除对象?您可以在即将展示新视图控制器之前轻松实现此目的。像这样:
// In whatever method you have to present the new view controller
// ...
NSMutableArray *names = [[NSMutableArray alloc] initWithCapacity:0];
for (int i = 0; i < listOfItems.count; i++)
{
if ([self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:i inSection:0]].accessoryType == UITableViewCellAccessoryCheckmark) //Change section number if not 0
{
[names addObject:[listOfItems objectAtIndex:i]];
}
}
// Pass the array now to the destination controller
聚苯乙烯。您仍然需要管理单元格的检查/取消检查(正如您在上面的代码中所做的那样)。