单击时更改单元格上按钮的图像

Question

In my cell i have 3 buttons, when the user clicks on each button the following 3 method gets fired.

- (void) but1:(id) sender{
    NSLog(@"Touched 1 %ld",(long)[(UIButton *)sender tag]);

}

- (void) but2:(id) sender{
    NSLog(@"Touched 2 %ld",(long)[(UIButton *)sender tag]);

}

- (void) but3:(id) sender{
    NSLog(@"Touched 3 %ld",(long)[(UIButton *)sender tag]);

}

Imagine a user clicks on button 1, and then the but1 method should get fired, and also the background image of button 1 should change. How can make this change in the above method.

NB: I am using XIB files.

I was able to access the NIB file that contains the cell .

UINib *cellNib = [UINib nibWithNibName:@"MyCell" bundle:nil];
        [self.contextMenuTableView registerNib:cellNib forCellReuseIdentifier:@"cell"];

Now how can i access the button he touched and change the image ?

UPDATE

This is a table view. And in each cell there are 3 buttons, I should be able select and deselect one of these buttons in the table.

For example if only 1 button in the cell can be selected . When the cell is selected i will show an image. And when it's not i will show the default image.

Answer 1

You can change the image of the sender as

- (void) but1:(id) sender{
    NSLog(@"Touched 1 %ld",(long)[(UIButton *)sender tag]);
    [((UIButton *)sender) setImage:[UIImage imageNamed:"image.png"] forState:UIControlStateNormal]
}

Good luck

Answer 2

Try something like

          UIImage *btnImage = [UIImage imageNamed:@"image.png"];
          [btnTwo setImage:btnImage forState:UIControlStateNormal];

Answer 3

To Know which button is pressed you can set Tag for every button. From that tag you will get which button is taped

In interface Section ..

int count;

In viewDidLoad

count=0;

- (IBAction)ButtonClicked:(id)sender {



    NSLog(@"Touched 1 %ld",(long)[(UIButton *)sender tag]);
    if(count%2==0)
    {
        [((UIButton *)sender) setBackgroundImage:[UIImage imageNamed:@"imageA.png"] forState:UIControlStateNormal];
    }
    else
   {
      [((UIButton *)sender) setBackgroundImage:[UIImage imageNamed:@"imageB.png"] forState:UIControlStateNormal];
   }


    [(UIButton *)sender setTitle:@"" forState:UIControlStateNormal];
    count=count+1;

}

Answer 4

- (void) but1:(id) sender{

  [but1 setBackgroundImage:[UIImage imageNamed:@"blue_button.png"]
                            forState:UIControlStateNormal];
  NSLog(@"Touched 1 %ld",(long)[(UIButton *)sender tag]);

 }

try this code, this might help you

Answer 5

May be this way you can archive it,

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    UIButton *btn1 = (UIButton *) [cell viewWithTag:1] ;
    UIButton *btn2 = (UIButton *) [cell viewWithTag:2];
    UIButton *btn3 = (UIButton *) [cell viewWithTag:3];
    [btn1 setTag:((indexPath.row*10)+1)];
    [btn1  setTag:((indexPath.row*10)+2)];
    [btn3 setTag:((indexPath.row*10)+3)];
    [btn1 addTarget:self action:@selector(but1:) forControlEvents:UIControlEventTouchDown];
    [btn2 addTarget:self action:@selector(but2:) forControlEvents:UIControlEventTouchDown];
    [btn3 addTarget:self action:@selector(but3:) forControlEvents:UIControlEventTouchDown];
    return cell;
}

- (void) but1:(UIButton *) sender{
    NSLog(@"Touched 1 %ld",((long)[(UIButton *)sender tag])%10);
    [sender setBackgroundImage:[UIImage imageNamed:@"newImage.png"] forState:UIControlStateNormal];
    NSInteger row = ((long)[sender tag])/10;
    NSIndexPath *indexPathOfYourCell = [NSIndexPath indexPathForRow:row inSection:0];
    [self.tableview beginUpdates];
    [self.tableview reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPathOfYourCell] withRowAnimation:UITableViewRowAnimationNone];
    [self.tableview endUpdates];
}

- (void) but2:(UIButton *) sender{
    NSLog(@"Touched 2 %ld",((long)[(UIButton *)sender tag])%10);
    [sender setBackgroundImage:[UIImage imageNamed:@"newImage.png"] forState:UIControlStateNormal];
    NSInteger row = ((long)[sender tag])/10;
    NSIndexPath *indexPathOfYourCell = [NSIndexPath indexPathForRow:row inSection:0];
    [self.tableview beginUpdates];
    [self.tableview reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPathOfYourCell] withRowAnimation:UITableViewRowAnimationNone];
    [self.tableview endUpdates];
}

- (void) but3:(UIButton *) sender{
    NSLog(@"Touched 3 %ld",((long)[(UIButton *)sender tag])%10);
    [sender setBackgroundImage:[UIImage imageNamed:@"newImage.png"] forState:UIControlStateNormal];
    NSInteger row = ((long)[sender tag])/10;
    NSIndexPath *indexPathOfYourCell = [NSIndexPath indexPathForRow:row inSection:0];
    [self.tableview beginUpdates];
    [self.tableview reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPathOfYourCell] withRowAnimation:UITableViewRowAnimationNone];
    [self.tableview endUpdates];
}

Enjoy Coding !!

Answer 6

you can also use this

button1.tag = 0;
button2.tag = 1;
button3.tag = 2;
[button1 setImage:[UIImage imageNamed:@"image.png"] forState:UIControlStateNormal];
[button1 setImage:[UIImage imageNamed:@"selected_image.png"] forState:UIControlStateSelected];
[button2 setImage:[UIImage imageNamed:@"image.png"] forState:UIControlStateNormal];
[button2 setImage:[UIImage imageNamed:@"selected_image.png"] forState:UIControlStateSelected];
[button3 setImage:[UIImage imageNamed:@"image.png"] forState:UIControlStateNormal];
[button3 setImage:[UIImage imageNamed:@"selected_image.png"] forState:UIControlStateSelected];

Add a common selector( buttonClicked: ) to all the buttons and implement the selector as follows

- (void)buttonClicked:(id)sender
{
    [button1 setSelected:NO];
    [button2 setSelected:NO];
    [button3 setSelected:NO];

    if ([sender isKindOfClass:[UIButton class]]) 
        [sender setSelected:YES];
}