Passing argument in button action method without use of tag

Question

i am creating button dynamically. and creation action methods by

  [newButton addTarget:self action:@selector(goToNew:)forControlEvents:UIControlEventTouchUpInside];

i want to send argument (indexpath.row) from tableview , but not want to use tag.. because i need that tag will remain same for all the buttons , how can i pass argument in button action ?

actually i am adding button in each tableview cell , and i want action for all those buttons , but if i use tag = indexpath.row and and use it with action, it works but problem of overlaying button happen.hence i want tag would be constant.

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

static NSString *CellIdentifier = @"Cell";
UIButton *btn;

UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];

    btn = [UIButton buttonWithType:UIButtonTypeCustom];
    [btn addTarget:self action:@selector(goToNew:) forControlEvents:UIControlEventTouchUpInside];
    btn.tag = 55;
    [cell.contentView addSubview:btn];

}
else {
    btn = (id)[cell.contentView viewWithTag:55];

}

return cell;

}

- (void) goToNew:(id)sender

{
UIButton *b = (UIButton *)sender; UITableViewCell cell = (UITableViewCell)[b superview];
int row = [msgTableView indexPathForCell:cell].row; (@"row is :::%d",row);

Have a look at my answer here: http://stackoverflow.com/questions/7399119/custom-uitableviewcell-button-action/14955341#14955341 — djskinner, Feb 19 '13 at 10:38

alloc_iNit · Accepted Answer · 2011-09-09T08:24:11.423

1

By doing following code, you will get the indexPath.row and no need to set the button tag.

- (IBAction)goToNew:(id)sender 
{
    UIButton *btn = (UIButton*) sender;
    UITableViewCell *cell = (UITableViewCell*) [btn superview];
    NSIndexPath *indexPath = [tableView indexPathForCell:cell]; 
    int row = indexPath.row;
}

edited Sep 09 '11 at 08:24

answered Sep 08 '11 at 12:13

alloc_iNit

5,173
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but how can i know that which button it is ... means in which cell my button is , i get it with sender.tag but now how can i get that integer value ? – PJR Sep 08 '11 at 12:20
using btn.tag you can get tag of taht button – Narayana Rao Routhu Sep 08 '11 at 12:26
i want to do it without tag.. i want tag will remain constant. – PJR Sep 08 '11 at 12:29
1

@PJR, In the above code, use `NSIndexPath *indexPath = [tableView indexPathForCell:cell]; int row = indexPath.row;` – EmptyStack Sep 08 '11 at 12:33
actually i am adding button in each tableview cell , and i want action for all those buttons , but if i use tag = indexpath.row and and use it with action, it works but problem of overlaying button happen.hence i want tag would be constant. – PJR Sep 08 '11 at 12:44
1

If you are adding the button to `cell.contentView`, you should retrieve it as, `UITableViewCell *cell = (UITableViewCell*) btn.superview.superview;` – EmptyStack Sep 08 '11 at 12:48

Jatin Patel - JP · Answer 2 · 2011-09-08T13:15:34.987

You can pass another argument as set title of button using different forstate.Here you can pass indexpath as title of button.like

    btn.tag=10;
    [btn setTitle:[NSString stringWithFormat:@"%d",indexpath.row] forState:UIControlStateDisabled];
    [btn addTarget:self action:@selector(btnClick:)forControlEvents:UIControlEventTouchUpInside];

and you will received argument as

-(void)btnClick:(id)sender
{
UIButton* b = (UIButton*) sender;   
NSLog(@"tag=%d",b.tag);
   //Below line will got indexpath in string formate..
NSLog(@"title =%@",[b titleForState:UIControlStateDisabled]);
}

score 0 · Answer 3 · answered Sep 08 '11 at 12:16

0

-(void)goToNew:(id)sender

{
    UIButton *btnTemp = (UIButton *)[yourTableView viewWithTag:sender];
    int iTag = btnTemp.tag;  

}

answered Sep 08 '11 at 12:16

Maulik

19,348
14
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for this when i create my button i have to spectifiy mybtn.tag = indexpath.row , am i right ? but i want that tag would be constant , so i want to do without specifying a tag at the creation of buttom – PJR Sep 08 '11 at 12:27
there is no title for button. only image. how can i use it ? – PJR Sep 08 '11 at 12:41
1

i think you should use tag so you can differentiate buttons... ot you can use row's index so you can get at which row's button gets clicked... – Maulik Sep 08 '11 at 12:43
actually i am adding button in each tableview cell , and i want action for all those buttons , but if i use tag = indexpath.row and and use it with action, it works but problem of overlaying button happen.hence i want tag would be constant. – PJR Sep 08 '11 at 12:45
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/3269/discussion-between-maulik-and-pjr) – Maulik Sep 08 '11 at 12:47

Passing argument in button action method without use of tag

3 Answers3