tableViewController on button click - iphone

Question

I have a tableViewController, the cells contains a button and a label. I need to get the text of the cell (actually the object of the cell Person) when the user clicks on the button.
When the user clicks on the button the following method gets executed;
-(void) buttonOfCellClicked{
// here i need to access the `Person` object that the user clicked
}
How do i write this code?
EDIT:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
Person *person = [personsArr objectAtIndex:indexPath.row];
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] ;
label = [[UILabel alloc]initWithFrame:CGRectMake(15, 5, 75, 60)];
label.text =person.firstName;
[cell addSubview:label];
UIButton *button= [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self action:#selector(buttonOfCellClicked) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:button];
}

Answer 1

id findAncestor(UIView *view, Class class) {
while (view && ![view isKindOfClass:class])
view = [view superview];
return view;
}
- (void)buttonOfCellClicked:(UIButton *)button
{
UITableViewCell *cell = (UITableViewCell *)findAncestor(button, [UITableViewCell class]);
UITableView *table = (UITableView *)findAncestor(cell, [UITableView class]);
NSIndexPath *path = [table indexPathForCell:cell];
if (!path)
return;
Person *person = [personsArr objectAtIndex:path.row];
// do whatever with person
}

Answer 2

I would subclass UITableviewCell and add a property and the action to that class and in IB connect the button. When you are configuring the cell just set the person object. This approach would depend heavily on what you plan on doing with that object.

Answer 3

You need to ask your button to tell you where it is. To achieve this, you need to call superview twice (1x will return cell.contentView, 2x will return cell):
- (void)buttonOfCellClicked:(UIButton *)sender {
UITabvleViewCell *cell = (UITableViewCell *)[[sender superview] superview];
}
Then you can access cell's properties e.g. cell.textLabel.text
EDIT: You also need to add : to your -addTarget:action:forControlEvents: in cellForRow after buttonOfCellClicked text:
[button addTarget:self action:#selector(buttonOfCellClicked:) forControlEvents:UIControlEventTouchUpInside]
EDIT2: you can access person by
NSIndexPath *ip = [yourTableView indexPathForCell:cell];
Person *p = [personArr objectAtIndex:ip.row];

Answer 4

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [yourArray count];\
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] ;
UIButton *button= [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button setTag:indexPath.row]; // SET TAG TO YOUR BUTTON, IT WILL BE SAME AS YOUR OBJECT AT INDEX OF ARRAY
[button addTarget:self action:#selector(buttonOfCellClicked:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:button];
}
-(void) buttonOfCellClicked:(id) sender{
Person *person = [yourArray objectAtIndex:[sender tag]];
// here i need to access the `Person` object that the user clicked
}