iphone - UILabel 无法更新标签文本

Question

我是 ios 的新手。我有一个 viewController，其中有一个通知观察器。例如

-(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;
  */
}

我该如何解决这个问题？

Answer 1

-(void) myNotificationObFn:(Notification *)noti
{
    dispatch_sync(dispatch_get_main_queue(), ^{
        NSString *ns = [NSString stringWithFormat:@"%d", 10];
        labelfromtag.text = ns;
        [labelfromtag setNeedDisplay];
   });
}