ios proper way to update programatic uilabels with viewdidappear - iphone

Question

Every time this tab get loaded instead of updating the dynamic label, it writes a brand new label over it. What do I need to put in this code so that it updates it or clears the dynamic labels and then put in the new label. I feel like its probably just a simple one line fix. Here is a simplified version of the code:
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:YES];
goalArray = [[NSMutableArray alloc] init];
NSURL *url = [NSURL URLWithString:#"http://localhost/goal.php"];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
[request setPostValue:test forKey:#"name"];
[request setDelegate:self];
[request startAsynchronous];
}
- (void)requestFinished:(ASIFormDataRequest *)request
{
...
for (id myArrayElement in goalArray)
{
NSLog(#"y value:%i", yValue);
UILabel *label = [[UILabel alloc] initWithFrame: CGRectMake(0, yValue, 80, 44)];
label.font = [UIFont systemFontOfSize:12];
label.textColor = [UIColor blackColor];
label.backgroundColor = [UIColor clearColor];
label.text = myArrayElement;
[self.view addSubview:label];
yValue += 44;
}
}

Answer 1

In requestFinished: before the for loop, add this:
for ( UIView *die in [self subviews]) { // clear out previous label
if ( die.tag == 123 ) {
[die removeFromSuperview];
}
}
and then inside your for loop, add this:
label.tag = 123; //doesn't have to be 123, as long as it's an int that matches the one above.