CODEWITHSUNDEEP
objective-ciosuitableviewsegue
Guferos
Guferos

Reputation: 4367

How to find indexPath for tapped accessory button in tableView

I've simple UITableView with one section and few rows. When user clicks cell accessory button (which is connected with detailsSegue. I want to know what cell row was it. So than I can select right object from my array and assign it to the variable from the next view.

I have used delegate method tableview:accessoryButtonTappedForRowWithIndexPath: and assigned indexPath value to my private property myRow. Than in prepareForSegue:sender: method I used my self.myRow.row value to select right object from array.

My problem is that these two methods seems to execute in wrong order. From the NSLog I can see that prepareForSegue:sender: method is executed first and my delegate method is changing value of self.myRow after it.

So prepareForSegue:sender: method is always passing wrong object to the next view (the one that was tapped previously).

Sorry for my english guys. Thanks for help in advance.

-(void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath {
    self.myRow = indexPath;
    NSLog(@"tapped button at row: %i",self.myRow.row); 
}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if([segue.identifier isEqualToString:@"addSegue"]) {
        AddViewController *avc = segue.destinationViewController;
        avc.delegate = self;
    }
    else if ([segue.identifier isEqualToString:@"detailsSegue"]) {
        NSLog(@"Segue row: %i",self.myRow.row);
        Annotation *annotation = [self.viewsList objectAtIndex:self.myRow.row];
        NSLog(@"Segue annotation object: %@",annotation.title);
        DetailsViewController *dvc = segue.destinationViewController;
        dvc.wikiKey = annotation.title;
    }
}

Upvotes: 15

Views: 12991

Answers (4)

Ashish
Ashish

Reputation: 1897

// I tell you a simple and a better and an easy option :-

// Solution :- You can assign tag to button of accessory view in this method of tableView

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // set accessory view
    UIButton *oValidHomeAccessryBtn = [UIButton buttonWithType:UIButtonTypeCustom];

    // set target of accessory view button
    [oValidHomeAccessryBtn addTarget:self action:@selector(AccessoryAction:) forControlEvents:UIControlEventTouchUpInside];

    // set tag of accessory view button to the row of table
    oValidHomeAccessryBtn.tag =indexPath.row;

    // set button to accessory view
    cell.accessoryView = oValidHomeAccessryBtn ;
}

// Make the method you passed in selector and get tag value and you would get indexPath of accessory view clicked 

- (void)AccessoryAction:(id)sender
{
    NSLog(@"%d",[sender tag]);
}

This is the simplest way to get the indexPat of row in which you clicked the accessory view.

Upvotes: 2

Adam Johnson
Adam Johnson

Reputation: 2226

What you need to do is call the segue programmatically from the delegate method. Assuming you're using storyboards, you'll need to unlink the segue in the storyboard and in your delegate method use:

[self performSegueWithIdentifier: @"IdentifierNameHere" sender: self];

Upvotes: -3

rob mayoff
rob mayoff

Reputation: 386018

As you have discovered, the system sends you the prepareForSegue:sender: message before it sends you the tableview:accessoryButtonTappedForRowWithIndexPath: message.

But, when it sends you the prepareForSegue:sender: message, the sender argument is the UITableViewCell containing the accessory view. You can use that to determine which row's accessory button was tapped:

else if ([segue.identifier isEqualToString:@"detailsSegue"]) {
    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
    Annotation *annotation = [self.viewsList objectAtIndex:indexPath.row];
    DetailsViewController *dvc = segue.destinationViewController;
    dvc.wikiKey = annotation.title;
}

Upvotes: 41

zem
zem

Reputation: 1257

The sender will be the accessory button, right? In that case you should be able to find its containing cell by going up through super views and then get the index path of that cell. I’ve used a method like this before to do the first part:

+ (UITableViewCell *)findParentCellOfView:(UIView *)view {
  if (view == nil || [view isKindOfClass:[UITableViewCell class]]) {
    return (UITableViewCell *)view;
  }
  return [self findParentCellOfView:[view superview]];
}

Upvotes: 2

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