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];
}