FieldValue.serverTimestamp()で入ったデータを変換

nilなので

        let tmpTimeStamp: Timestamp? = data["date"] as? Timestamp
        if let timeStamp = tmpTimeStamp {
            date = timeStamp.dateValue()
        } else if let tmpDate = message.get("date", serverTimestampBehavior: .estimate) as? Timestamp {
            // FieldValue.serverTimestamp()で入ったデータを変換
            // https://qiita.com/oYuu/items/fa7479a37f49cf7fc294
            date = tmpDate.dateValue()
        }

dancing quickly

The video of the prime minister dancing quickly became a popular internet meme. doing a fast/complicated dance steps

通知の赤丸BottomNavigationBarItemに入れる

https://flutteragency.com/how-to-display-notification-badge-on-bottom-navigation-bar-icon/

BottomNavigationBarItemにやる

Stackに

                          Positioned(
                            right: 0,
                            child: Container(
                              padding: const EdgeInsets.all(1),
                              decoration: BoxDecoration(
                                color: Colors.red,
                                borderRadius: BorderRadius.circular(6),
                              ),
                              constraints: const BoxConstraints(
                                minWidth: 12,
                                minHeight: 12,
                              ),
                              child: const Text(
                                '$_counter',
                                style: TextStyle(
                                  color: Colors.white,
                                  fontSize: 8,
                                ),
                                textAlign: TextAlign.center,
                              ),
                            ),
                          ),

だな _counter は数字

マスクのグラデーション

https://gist.github.com/FromAtom/f078bbe73301ec6a4e2e12a1b3ec62de

隠したいものの親ビュー作るのがミソ（対象はUICollectionViewでもOK）、上下を左右にするには

        // 左右にする
        gradient.startPoint = CGPoint(x: 0, y: 0.5)
        gradient.endPoint = CGPoint(x: 1, y: 0.5)

exact・precise・accurate・correctは、

exact・precise・accurate・correctの違い！正確なを英語で