- (void)todoSomething:(id)sender

{

//在這裡做按鈕的想做的事情。

}

- (void)starButtonClicked:(id)sender

{

//先將未到時間執行前的任務取消。

[[selfclass] cancelPreviousPerformRequestsWithTarget:selfselector:@selector(todoSomething:)object:sender];

[self performSelector:@selector(todoSomething:)withObject:sender afterDelay:0.2f];

}