This is my code, just added the image but not changing when hit the button. Please suggest a working code.

-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{

    
    const CGRect fr = CGRectMake(0, 0, 320.0, 40.0 );
    btn = [[UIButton alloc]initWithFrame:fr];
     UIImageView *imgArrow = [[UIImageView alloc]initWithFrame:CGRectMake(380, 2.5, 25, 25)];
     imgArrow.image=[UIImage imageNamed:@"arrow.jpeg"];
    [btn setTitle:[self tableView:tableView titleForHeaderInSection:section] forState:UIControlStateNormal ];
    btn.contentHorizontalAlignment =UIControlContentHorizontalAlignmentLeft;
     [btn setBackgroundColor:[UIColor redColor]];
    
     [btn setTag:section];
     [btn addSubview:imgArrow];
 
     [btn addTarget:self action:@selector(sectionOpenToggle:) forControlEvents:UIControlEventTouchUpInside];
    
return btn;
}

CodePudding user response：

First, buttons already have an image view that you can use, so don't do this:

[btn addSubview:imgArrow];

Instead, do this:

[btn setImage:[UIImage imageNamed:@"arrow.jpeg"] forState:UIControlStateNormal];

Then, in your sectionOpenToggle method (assuming it looks like this), change the image:

- (void)sectionOpenToggle:(UIButton *)sender {
    [sender setImage:[UIImage imageNamed:@"other-arrow.jpeg"] forState:UIControlStateNormal];
    // whatever else you want to do
}