Question

i am new to ios. I have a viewController, where in there is a notification observer.
For example

-(void) myNotificationObFn:(Notification *)noti
{
  /* Here i am trying to change the text of UILabel, which is not working. 
  ie:
    NSString *ns = [NSString stringWithFormat:@"%d", 10];
    mylabel.text = ns;
  */
}

How can i resolve this issue ?

Answer 1

try using the tag function if you want to change the label

examples :

if you create the label programmatically, set the tag of your label after you create it for the first time

UILabel *myLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 50)];
[myLabel setTag:1234];

if you create the label in your XIB or storyboard, just change the “tag” field

this way, your label get a tag “1234”

after this, if you need to edit this label , on your notification method put this code

UILabel *labelfromtag = (UILabel*)[self.view viewWithTag:1234]; //this code direct label "labelfromtag" to your "myLabel", so your new label here is actually your old label
NSString *ns = [[NSString alloc] initWithFormat:@"%d", 10];

labelfromtag.text = ns;

good luck :]

edit : also, is this notification reside in the same class / controller as ur UILabel?