ResearchKit 取消按鈕不起作用

Question

我正在使用 ResearchKit 處理一個項目（Swift），但我的“取消”欄按鈕不起作用。 我發現以下方法應該可以使它工作

- (void)setCancelButtonItem:(UIBarButtonItem *)cancelButtonItem {
    [super setCancelButtonItem:cancelButtonItem];
    [cancelButtonItem setTarget:self];
    [cancelButtonItem setAction:@selector(cancelButtonHandler:)];
}
- (void)cancelButtonHandler:(id)sender {
    STRONGTYPE(self.taskViewController.delegate) strongDelegate = self.taskViewController.delegate;
    if ([strongDelegate respondsToSelector:@selector(taskViewController:didFinishWithReason:error:)]) {
        [strongDelegate taskViewController:self.taskViewController didFinishWithReason:ORKTaskViewControllerFinishReasonDiscarded error:nil];
    }
}

我收到“放棄結果”和“取消”彈出窗口，但當我點擊“放棄結果”選項時沒有任何反應。

我應該檢查其他東西嗎？ 我應該將它連接到某個地方嗎？

Answer 1

單擊該按鈕應調用任務視圖控制器委托中的taskViewController(taskViewController: ORKTaskViewController, didFinishWithReason reason: ORKTaskViewControllerFinishReason, error: NSError?)方法。 您必須在那里手動關閉任務視圖控制器。

例如，參見ORKCatalog的TaskListViewController.swift ：

func taskViewController(taskViewController: ORKTaskViewController, didFinishWithReason reason: ORKTaskViewControllerFinishReason, error: NSError?) {
    /*
        The `reason` passed to this method indicates why the task view
        controller finished: Did the user cancel, save, or actually complete
        the task; or was there an error?

        The actual result of the task is on the `result` property of the task
        view controller.
    */
    taskResultFinishedCompletionHandler?(taskViewController.result)

    taskViewController.dismissViewControllerAnimated(true, completion: nil)
}