How use delegate for button in cell table?

Question

I have a standard method, that forms the cell inside table:

- (SearchTableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    cell.button.tag = 3;
}

There is button inside cell with action:

- (IBAction)changeName:(id)sender {
    // GOTO
}

How to change the name of the button after I clicked on it

`UIButton *button = (UIButton *)sender; if (button.tag == 3){//set button title}`? — Larme, Mar 01 '16 at 16:29
@Larme, that's probably the whole answer. You care to make that an answer? :) — Tobi Nary, Mar 01 '16 at 16:34
Possible duplicate of [Objective C: what is a "(id) sender"?](http://stackoverflow.com/questions/5578139/objective-c-what-is-a-id-sender) — Larme, Mar 01 '16 at 16:36

score 0 · Accepted Answer · answered Mar 01 '16 at 16:53

0

Try it :

- (IBAction)changeName:(id)sender {
    UIButton *button = (UIButton *)sender;

    if (button.tag == 3) {
        [button setTitle:@"Your title" forState:UIControlStateNormal];
    }
}

Don't forget to link your method to your button in the nib.

answered Mar 01 '16 at 16:53

Pipiks

2,018
12
27

I have not difference tag – DjamilBahirov Mar 01 '16 at 17:27
Dear @Pipiks, make note that button is on tableview cell. So button action will only be handled with Protocol Delegate way or Add target to button in CellForRowAtIndexPath. – Avinash Jadhav Mar 02 '16 at 08:49
why don't you just use `–(IBAction)changeName:(UIButton *)sender {...}`...? – holex Mar 02 '16 at 09:15

Avinash Jadhav · Answer 2 · 2016-03-02T08:47:27.313

Using protocol Delegate method
Code for custom cell .h file

#import <UIKit/UIKit.h>
@protocol CustomCellProtocal <NSObject>
 -(void)CellButtonClicked:(UIButton *)sender;
@end

@interface CustomCell : UITableViewCell
   @property(weak) id<CustomCellProtocal>delegate;
   - (IBAction)BtnClicked:(id)sender;
@end

code for custom cell .m file

#import "CustomCell.h"

@implementation CustomCell
@synthesize delegate;
  - (IBAction)BtnClicked:(id)sender {
      [delegate CellButtonClicked:sender];
   }
@end

Another simplest way
I suggest you to create custom cell having Button. Create outlet for that button in custom cell class.

Then in cellForRowAtIndexpath() add target to that button like follow

[CustomCell.buttonOutlet addTarget:self action:@selector(BtnClicked:) forControlEvents:UIControlEventTouchUpInside];

Then handle your logic in BtnClicked method.

-(void)BtnClicked:(UIButton *)sender{
     if(sender.tag == 1){
        [sender setTitle:@"Hello" forState:UIControlStateNormal];
 }
}

I strongly suggest, second way is best for your case. And cell will be dequed with identifier. so no need to worry.

That is horrible, not only is this not anwering the question at all, nor does it adhere to code conventions. Also, this adds a new target on every call to `tableView:cellForRowAtIndexpath:`, so the button may fire the action(s) more than once. — Tobi Nary, Mar 01 '16 at 16:42
Actually cell is dequeReusableCellWithIdentifier.... Secondly by setting tag to each button as of indexPath.row we can identify each button of the record and perform login in same TargetAction method — Avinash Jadhav, Mar 01 '16 at 16:48

How use delegate for button in cell table?

2 Answers2