Overwriting an image button with another image when I click that button - iphone

Question

I have created an image button (a.png) infront of each row in the cellForRow method. In the same method itself I'm calling a buttonPressed method which has the code to be executed when the button is pressed. And I want that on the pressing of the button, the button image should be changed to another image (b.png) of the same size.
Please help with how to do that.

Answer 1

[but setBackgroundImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];
[but setBackgroundImage:[UIImage imageNamed:#"b.png"] forState:UIControlStateSelected];
try this......

Answer 2

Create Custom Cell for UITableView and UIButton on Custom Cell.
Create property for UIButtion.
In cellForRowAtIndexPath: method
//Set Action on Button in Table View Row
[cell.UIButtonOutlet addTarget:self action:#selector(checkButtonTapped:event:) forControlEvents:UIControlEventTouchUpInside];
This will create action from your button.
And in method
-(void)checkButtonTapped:(id)sender event:(id)event
{
NSSet *touches=[event allTouches];
UITouch *touch=[touches anyObject];
CGPoint currentTouchPosition = [touch locationInView:self.historyTableView];
//GET IndexPath
NSIndexPath *indexPath=[self.TableView indexPathForRowAtPoint: currentTouchPosition];
selectedCell= [PairTableView cellForRowAtIndexPath:indexPath];
[selectedCell.UIButtonOutlet setImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];

Answer 3

Try the following method
UIButton *button = [UIButton buttonWithType:UIButtonTypeContactAdd];
[button setFrame:CGRectMake(12,12,200,200)];
[button addTarget:self action:#selector(click: withEvent:) forControlEvents:UIControlEventTouchUpInside];
[button setTag:indexPath.row];
[button setBackgroundImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];
[cell.contentView addSubview:button];
then in the click action method of button
-(void)click:(UIButton *)button :withEvent:(UIEvent *)events{
[self yourFunction:(UIButton *)button];
}
then finally
-(void)yourFunction:(UIButton *)button{
button.selected = ! button.selected;
if (button.selected) {
[button setBackgroundImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];
}
else{
[button setBackgroundImage:[UIImage imageNamed:#"b.png"] forState:UIControlStateNormal];
}
}

Answer 4

Try this when initializing your button
UIButton *button=[UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:#"a.png"] forState:UIControlStateNormal];
Then modify your method(which is called when button is pressed) like this
-(void)yourMethod:(id)sender{
UIButton *btn=(UIButton*)sender;
[btn setImage:[UIImage imageNamed:#"b.png"] forState:UIControlStateNormal];
//your other code
}