Dynamic UIButton controlls and actions in iphone? - iphone

Question

i am creating an application which includes dynamic pages. actually, i created some dynamic questions and UIButtons (custom checkBox) by checking the responses from the server.
my code is here,
NSString *response=[ResponseFromServer ObjectAtIndex:0];
if ([comSt compare: #"CheckBoxList"]==NSOrderedSame)
{
int count=[ResponseFromServer count];
for(int i=0;i<count;i++)
{
button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.tag=i;
[button setFrame:CGRectMake(0.0f, 0.0f, 37, 37)];
[button setCenter:CGPointMake(116.0,p1)];
[button setImage:[UIImage imageNamed:#"uncheck.png"] forState:UIControlStateNormal];
[button setBackgroundColor:[UIColor whiteColor]];
[button addTarget:self action:#selector(checkButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
[self.scrollView addSubview:button];
p1=p1+30;
}
-(void)checkButtonTapped:(id)sender
{
int tagVal = [(UIButton*)sender tag];
if (tagVal==0) {
NSLog(#"tag = 0");
[button setSelected:YES];
[button setImage:[UIImage imageNamed:#"check.png" forState:UIControlStateSelected]; //not working, button image is not changing
}
assume i have created 5 dynamic buttons with different tag. i set the image for all those button to uncheck.png first. it works.
but when i clicked a specific button and need to change that button image to checked.png, its not working on the button action.
i need to change it like checkBox control, how will i access the control of a dynamically created button from a group of buttons?
i think u can understand my requirement, thanks in advance..

Answer 1

While adding dynamic button set [button setSelected:NO];
Replace method and Add one method given below
-(void)checkButtonTapped:(id)sender
{
UIButton *curButton = (UIButton*)sender
if (curButton.tag==0)
{
[self buttonAction:curButton];
}
if (curButton.tag==1)
{
[self buttonAction:curButton];
}
// continues
}
-(void)buttonAction:(UIButton *)curButton
{
if(![curButton isSelected])
{
[curButton setSelected:YES];
[curButton setImage:[UIImage imageNamed:#"check.png" forState:UIControlStateSelected]; //not working, button image is not changing
} else {
[curButton setSelected:NO];
[curButton setImage:[UIImage imageNamed:#"uncheck.png"] forState:UIControlStateNormal];
}
}

Answer 2

In your code you need to change like this
Try this code
if ([comSt compare: #"CheckBoxList"]==NSOrderedSame)
{
int count=[ResponseFromServer count];
for(int i=0;i<count;i++)
{
button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.tag=0;
[button setFrame:CGRectMake(0.0f, 0.0f, 37, 37)];
[button setCenter:CGPointMake(116.0,p1)];
[button setImage:[UIImage imageNamed:#"uncheck.png"] forState:UIControlStateNormal];
[button setBackgroundColor:[UIColor whiteColor]];
[button addTarget:self action:#selector(checkButtonTapped:) forControlEvents:UIControlEventTouchUpInside];
[self.scrollView addSubview:button];
p1=p1+30;
}
}
-(void)checkButtonTapped:(id)sender
{
int tagVal = [(UIButton*)sender tag];
if (tagVal==0) {
NSLog(#"tag = 0");
[button setSelected:YES];
[button setImage:[UIImage imageNamed:#"check.png" forState:UIControlStateSelected];
[button setTag:100];
}
else
{
[button setSelected:YES];
[button setImage:[UIImage imageNamed:#"uncheck.png" forState:UIControlStateSelected];
[button setTag:0];
}
}