Accessing UILabel created on run time - ios

Question

I have created UILabel (lblCount) and UIButton (btnAdd) on a UIButton (Add Item Button)'s action method. The new UILabel and UIButton is added to scrollview. The UILabel (lblCount) shows count of UIButton (btnAdd) tapped. Here, addBtnClickCount is an integer which counts the number of click.
UILabel * lblCount = [[UILabel alloc] initWithFrame:CGRectMake( 50, 100*addBtnClickCount, 25, 25)];
lblCount.text = [NSString stringWithFormat:#"%d",count];
lblCount.tag = addBtnClickCount;
lblCount.textColor = [UIColor whiteColor];
lblCount.textAlignment = NSTextAlignmentCenter;
[self.scrollView addSubview:lblCount];
addBtnClickCount = addBtnClickCount+1;
There will be multiple label (lblCount) and button (btnAdd) when user taps Add Item Button. I want to access particular label for particular add button and display the count.

Answer 1

You have already set tag on your label. Create a mutable array labelArray and add label to it. To access the particular label do following code on add button's action.
-(void)addItem:(UIButton*)button{
UILabel* lblShowCount = [_labelArray objectAtIndex:[button tag]];
lblShowCount.text = [NSString stringWithFormat:#"%d", [lblShowCount.text integerValue]+1];
}

Answer 2

Here i understand that #Hem Poudyal, know's that with help of viewWithTag.he will get output. but don't know how to achieved that. so i am describing over here.
Step 1: Here i am adding UILabel and UIButton to self.view instead of UIScrollView. i hope you can convert it as UIScrollView. here i applied some relation between UILabel tag and UIButton tag. that you can see in below code.
for (int i=0; i<10; i++) {
UILabel * lblCount = [[UILabel alloc] initWithFrame:CGRectMake( 50, (i*50)+((i+1)*5), 100, 50)];
lblCount.text = [NSString stringWithFormat:#"%d",0];
lblCount.tag = [[NSString stringWithFormat:#"%d%d",i,i] integerValue];
lblCount.backgroundColor = [UIColor yellowColor];
lblCount.textAlignment = NSTextAlignmentCenter;
[self.view addSubview:lblCount];
UIButton* btnTemp = [UIButton buttonWithType:UIButtonTypeCustom];
btnTemp.tag = i;
btnTemp.backgroundColor = [UIColor redColor];
[btnTemp addTarget:self action:#selector(btnTempClick:) forControlEvents:UIControlEventTouchUpInside];
btnTemp.frame = CGRectMake( 150, (i*50)+((i+1)*5), 100, 50);
[btnTemp setTitle:[NSString stringWithFormat:#"Button : %d",i] forState:UIControlStateNormal];
[self.view addSubview:btnTemp];
}
Step 2: In UIButton selector method, Do the following things.
-(IBAction)btnTempClick:(id)sender{
UIButton* btnInner = sender;
NSInteger lblTagbaseOnButtonTag = [[NSString stringWithFormat:#"%ld%ld",btnInner.tag,btnInner.tag] integerValue];
UILabel* lblReceived = (UILabel*)[self.view viewWithTag:lblTagbaseOnButtonTag];
lblReceived.text = [NSString stringWithFormat:#"%ld",[lblReceived.text integerValue]+1];
}
And Output is :

Answer 3

You should have an array that you add the labels and buttons too (this could be one array containing a dictionary or custom class or multiple arrays). Now, when a button is tapped you can find where it is in the array and get the corresponding label to update.
The cheat way is to set the tag of the buttons and labels so you can find one from the other using viewWithTag:.

Answer 4

You need to set unique tag value while creating the labels and buttons and by using viewWithTag: you can access the respective ui container.