[ios]让alertView 自动消失【转】

self.myalert=[[UIAlertView alloc] initWithTitle:@"提示" message:@"该数据删除成功" delegate:self cancelButtonTitle:nil otherButtonTitles: nil];
            
 [NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(performDismiss:) userInfo:nil repeats:NO];
  [self.myalert show];

-(void)performDismiss:(NSTimer*)timer

{
    
    [self.myalert dismissWithClickedButtonIndex:0 animated:NO];
    
}