How to access a UIButton or a UILabel in a UITableViewCell? - ios

Question

I have a UITableView with 20 rows. In each row, two UIButtons are added, so totally I have 40 buttons. How can I access each button in each cell? All those UIButton have the two tags 1 and 2.
For example: I want to write a method to change the background color of 2 buttons in a particular row:
-(void)changeColor:(int)row{
//code here
}
Do you have any suggestion?
-(UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tv dequeueReusableCellWithIdentifier:#"Cell"];
if (cell == nil){
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:#"Cell"] autorelease];
UIButton *button1=[[UIButton alloc] initWithFrame:CGRectMake(x1,y1,w1,h1)];
UIButton *button2=[[UIButton alloc] initWithFrame:CGRectMake(x2,y2,w2,h2)];
[button1 setTag:1];
[button2 setTag:2];
[[cell contentView] addSubview:button0 ];
[[cell contentView] addSubview:button1 ];
[button0 release];
[button1 release];
}
UIButton *button1 = (UIButton *)[cell viewWithTag:1];
UIButton *button2 = (UIButton *)[cell viewWithTag:2];
return cell;
}

Answer 1

You should be able to do this:
-changeColor:(int)row
{
NSIndexPath indexPath = [NSIndexPath indexPathForRow:row inSection:0]; // Assuming one section
UITableViewCell *cell = [myTableView cellForRowAtIndexPath:indexPath];
UIButton *button1 = (UIButton *)[[cell contentView] viewWithTag:1];
UIButton *button2 = (UIButton *)[[cell contentView] viewWithTag:2];
}
*some syntax might be wrong. I dont have Xcode handy

Answer 2

If you want to change the button color to have a highlighted / downstate I suggest to use the following:
[yourButton addTarget:self action:#selector(goToView:) forControlEvents:UIControlEventTouchUpInside];
[yourButton addTarget:self action:#selector(changeColor:) forControlEvents:UIControlEventTouchDown];
[yourButton addTarget:self action:#selector(touchCancel:) forControlEvents:UIControlEventTouchDragExit];
-(void)buttonAction:(UIButton*)sender
{
[self touchCancel:sender];
/* DO SOME MORE ACTIONS */
}
-(void)changeColor:(UIButton*)sender
{
sender.backgroundColor = [UIColor redColor];
}
-(void)touchCancel:(UIButton*)sender
{
sender.backgroundColor = [UIColor clearColor];
}
If you want to make the button have a different selected color, create an array that holds all the selected states. Then use the array to check if the button color needs a different color in cellForRowAtIndexPath.
When you want to change the button color just change the value in the array and call
[self.tableView reloadData];
Be sure to do it outside the if (cell == nil) method so it is also called when the cell is reused.