[英]Get the indexpath of the selected cell
当用户在UITableView
编辑模式下点击默认delete
按钮时,用户应该获得一个警报视图,如果他在AlertView中再次点击删除,该行应该被删除。最初,我使用以下代码完成此操作而没有AlertView,它工作正常。
[[self categoriesArray]removeObjectAtIndex:[indexPath row]];
NSArray *indexPathsToRemove = [NSArray arrayWithObject:indexPath];
[self.tableView deleteRowsAtIndexPaths:indexPathsToRemove withRowAnimation:UITableViewRowAnimationLeft];
[self.categoriesArray writeToFile:[self dataFilePath] atomically:YES];
但是现在,因为我必须在alertview委托方法中使用相同的代码。我不知道如何获取[indexPath row]
将索引路径设置为UIAlertView
标记并从Delegate获取。
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath // indexPath is here
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
UIAlertView * alertView = [[UIAlertView alloc]initWithTitle:@"Alert" message:@"Are you sure want to delete" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Delete", nil];
[alertView setTag:indexPath.row]; // Assigning here.
[alertView show];
}
}
// UIAlertView Delegate
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSLog(@"%d",alertView.tag); // Your Indexpath is here
**Edited:**
NSIndexPath * path = [NSIndexPath indexPathForRow:alertView.tag inSection:0];
[[self categoriesArray]removeObjectAtIndex:[path row]];
NSArray * indexPathsToRemove = [NSArray arrayWithObject:path];
[self.tableView deleteRowsAtIndexPaths:indexPathsToRemove withRowAnimation:UITableViewRowAnimationLeft];
[self.categoriesArray writeToFile:[self dataFilePath] atomically:YES];
}
将标记设置为commitEditingStyle方法的警报视图
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath // indexPath is here
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"Delete Record" message:@"Are you sure to delete the record." delegate:self cancelButtonTitle:@"NO" otherButtonTitles:@"YES", nil];
alert.tag = indexPath.row;
[alert show];
}
}
在Alert delegate
方法上
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(buttonIndex == 1)//YES button clicked
{
[[self categoriesArray]removeObjectAtIndex:alertView.tag];
}
}
UITableView
通过以下方式为您提供此信息:
- (NSIndexPath *)indexPathForSelectedRow
或者如果做出多项选择:
- (NSArray *)indexPathsForSelectedRows
在此委托方法中使用警报视图
- (void)tableView:(UITableView *)tableView didEndEditingRowAtIndexPath:(NSIndexPath *)indexPath
然后在用户单击“删除”时执行您想要执行的操作。 如果用户在alertview中预先删除,则必须使用alert view delegate方法来处理它。
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