短信按钮定时器

                        短信按钮定时器

{

timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(Timing) userInfo:nil repeats:YES];

num = 60;

[timer fire];

}

• (void)Timing{

  num–;

  [timeBtn setTitle:[NSString stringWithFormat:@”%d”,num] forState:UIControlStateNormal];

  if (num == 0) {

  [timer invalidate];
  
  timer = nil;
  
  [timeBtn setTitle:@"重新发送" forState:UIControlStateNormal];
  

  }

}