質問編集履歴
3
動画の削除
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@@ -757,21 +757,3 @@
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757
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```
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763
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# 動画 (分かりづらかったらすみません)
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764
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-
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765
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-
コードの部分はタイピングしているところです
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766
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-
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767
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-
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768
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-
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769
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-
クラスコンポーネントでの挙動
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770
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-
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771
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-
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772
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-
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773
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-
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774
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-
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775
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-
関数コンポーネントに置き換えて依存関係を解消した後の挙動
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776
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-
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777
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-
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2
動画についての補足説明
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test
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@@ -762,6 +762,8 @@
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762
762
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763
763
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# 動画 (分かりづらかったらすみません)
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764
764
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765
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+
コードの部分はタイピングしているところです
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766
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+
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765
767
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766
768
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767
769
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クラスコンポーネントでの挙動
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1
エラーメッセージとりあえず解消
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test
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@@ -26,6 +26,14 @@
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26
26
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28
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29
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+
# 追記
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30
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31
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+
とりあえず警告に出た依存関係を全て解消したら今度は挙動がおかしくなってしまいました。
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32
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33
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34
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35
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29
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# コード（部分的）
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30
38
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31
39
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@@ -515,3 +523,253 @@
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515
523
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516
524
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517
525
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```
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526
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527
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528
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529
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依存関係をとりあえず解決
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530
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+
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531
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+
```jsx
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532
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+
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533
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+
import React, {useState, useEffect ,useCallback} from "react";
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534
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+
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535
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+
import styled from "styled-components";
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536
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+
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537
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+
import ChangeScreenButton from "../Share/ChangeScreenButton"
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538
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+
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539
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+
import keyList from "../Share/keyList"
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540
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+
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541
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+
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542
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+
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543
|
+
// TODO 関数コンポーネント化
|
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544
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+
|
|
545
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+
// XXX 関数コンポーネント化する際に依存関係を解決しないといけない <=難しい
|
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546
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+
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547
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+
const Game = (props) => {
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548
|
+
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549
|
+
const [subject, setSubject] = useState("");
|
|
550
|
+
|
|
551
|
+
const [inputContent, setContent] = useState("");
|
|
552
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+
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553
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+
const [correctCount, correctCountUp] = useState(0);
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554
|
+
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555
|
+
const [incorrectCount, incorrectCountUp] = useState(0);
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556
|
+
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557
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+
const [elapsedTime_ms, setTime_ms] = useState(Date.now());
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558
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+
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559
|
+
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560
|
+
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561
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+
const maxSubject = 10;
|
|
562
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+
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563
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+
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564
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+
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565
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+
const generateSubject = () => {
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566
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+
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567
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+
const rnd = Math.floor(Math.random() * keyList.length);
|
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568
|
+
|
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569
|
+
const subject = keyList[rnd];
|
|
570
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+
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571
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+
setSubject(subject);
|
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572
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+
|
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573
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+
}
|
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574
|
+
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575
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+
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576
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+
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577
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+
const handleSubejctFinish = useCallback(() => {
|
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578
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+
|
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579
|
+
setTime_ms(Date.now() - elapsedTime_ms);
|
|
580
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+
|
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581
|
+
props.sendResult(correctCount, incorrectCount, elapsedTime_ms);
|
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582
|
+
|
|
583
|
+
props.handleScreen("result");
|
|
584
|
+
|
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585
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+
}, [elapsedTime_ms, correctCount, incorrectCount, props])
|
|
586
|
+
|
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587
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+
|
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588
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+
|
|
589
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+
const handleCorrect = useCallback(() => {
|
|
590
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+
|
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591
|
+
correctCountUp(correctCount + 1)
|
|
592
|
+
|
|
593
|
+
setContent("")
|
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594
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+
|
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595
|
+
if(correctCount >= maxSubject) {
|
|
596
|
+
|
|
597
|
+
handleSubejctFinish();
|
|
598
|
+
|
|
599
|
+
} else {
|
|
600
|
+
|
|
601
|
+
generateSubject();
|
|
602
|
+
|
|
603
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+
}
|
|
604
|
+
|
|
605
|
+
}, [correctCount, handleSubejctFinish])
|
|
606
|
+
|
|
607
|
+
|
|
608
|
+
|
|
609
|
+
const handleIncorrect = useCallback(() => {
|
|
610
|
+
|
|
611
|
+
incorrectCountUp(incorrectCount + 1);
|
|
612
|
+
|
|
613
|
+
}, [incorrectCount])
|
|
614
|
+
|
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615
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+
|
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616
|
+
|
|
617
|
+
const checkCorrectness = useCallback(() => {
|
|
618
|
+
|
|
619
|
+
if(inputContent === subject) {
|
|
620
|
+
|
|
621
|
+
handleCorrect();
|
|
622
|
+
|
|
623
|
+
} else {
|
|
624
|
+
|
|
625
|
+
handleIncorrect();
|
|
626
|
+
|
|
627
|
+
}
|
|
628
|
+
|
|
629
|
+
}, [inputContent, subject, handleCorrect, handleIncorrect])
|
|
630
|
+
|
|
631
|
+
|
|
632
|
+
|
|
633
|
+
const readInputKey = useCallback((e) => {
|
|
634
|
+
|
|
635
|
+
let pressedKey = e.key
|
|
636
|
+
|
|
637
|
+
console.log(pressedKey);
|
|
638
|
+
|
|
639
|
+
setContent(pressedKey)
|
|
640
|
+
|
|
641
|
+
checkCorrectness();
|
|
642
|
+
|
|
643
|
+
}, [checkCorrectness])
|
|
644
|
+
|
|
645
|
+
|
|
646
|
+
|
|
647
|
+
useEffect(() => {
|
|
648
|
+
|
|
649
|
+
generateSubject();
|
|
650
|
+
|
|
651
|
+
window.addEventListener("keypress", readInputKey);
|
|
652
|
+
|
|
653
|
+
console.log("キー入力受付開始");
|
|
654
|
+
|
|
655
|
+
return () => {
|
|
656
|
+
|
|
657
|
+
window.removeEventListener("keypress", readInputKey);
|
|
658
|
+
|
|
659
|
+
console.log("キー入力受付終了");
|
|
660
|
+
|
|
661
|
+
}
|
|
662
|
+
|
|
663
|
+
}, [readInputKey])
|
|
664
|
+
|
|
665
|
+
|
|
666
|
+
|
|
667
|
+
return (
|
|
668
|
+
|
|
669
|
+
<FlexContainer>
|
|
670
|
+
|
|
671
|
+
<Instruction>表示された数字または記号のキーを押してください</Instruction>
|
|
672
|
+
|
|
673
|
+
<Subject>{subject}</Subject>
|
|
674
|
+
|
|
675
|
+
<Footer>
|
|
676
|
+
|
|
677
|
+
<FlexP>問題数: {maxSubject}</FlexP>
|
|
678
|
+
|
|
679
|
+
<FlexP>正解数: {correctCount}</FlexP>
|
|
680
|
+
|
|
681
|
+
<ChangeScreenButton onClick={() => props.handleScreen("title")}>タイトルに戻る</ChangeScreenButton>
|
|
682
|
+
|
|
683
|
+
</Footer>
|
|
684
|
+
|
|
685
|
+
</FlexContainer>
|
|
686
|
+
|
|
687
|
+
);
|
|
688
|
+
|
|
689
|
+
}
|
|
690
|
+
|
|
691
|
+
|
|
692
|
+
|
|
693
|
+
const FlexContainer = styled.div`
|
|
694
|
+
|
|
695
|
+
position: relative;
|
|
696
|
+
|
|
697
|
+
display: flex;
|
|
698
|
+
|
|
699
|
+
flex-direction: column;
|
|
700
|
+
|
|
701
|
+
align-items: center;
|
|
702
|
+
|
|
703
|
+
width: 100%;
|
|
704
|
+
|
|
705
|
+
height: 100%;
|
|
706
|
+
|
|
707
|
+
`
|
|
708
|
+
|
|
709
|
+
|
|
710
|
+
|
|
711
|
+
const Instruction = styled.p`
|
|
712
|
+
|
|
713
|
+
font-size: 20px;
|
|
714
|
+
|
|
715
|
+
`
|
|
716
|
+
|
|
717
|
+
|
|
718
|
+
|
|
719
|
+
const Subject = styled.p`
|
|
720
|
+
|
|
721
|
+
flex: 1;
|
|
722
|
+
|
|
723
|
+
font-size: 90px;
|
|
724
|
+
|
|
725
|
+
`
|
|
726
|
+
|
|
727
|
+
|
|
728
|
+
|
|
729
|
+
const Footer = styled.div`
|
|
730
|
+
|
|
731
|
+
width: 100%;
|
|
732
|
+
|
|
733
|
+
justify-self: flex-end;
|
|
734
|
+
|
|
735
|
+
display: flex;
|
|
736
|
+
|
|
737
|
+
justify-content: space-around;
|
|
738
|
+
|
|
739
|
+
`
|
|
740
|
+
|
|
741
|
+
|
|
742
|
+
|
|
743
|
+
const FlexP = styled.p`
|
|
744
|
+
|
|
745
|
+
display: inline-block;
|
|
746
|
+
|
|
747
|
+
margin: 0.2em;
|
|
748
|
+
|
|
749
|
+
`
|
|
750
|
+
|
|
751
|
+
|
|
752
|
+
|
|
753
|
+
|
|
754
|
+
|
|
755
|
+
export default Game;
|
|
756
|
+
|
|
757
|
+
|
|
758
|
+
|
|
759
|
+
```
|
|
760
|
+
|
|
761
|
+
|
|
762
|
+
|
|
763
|
+
# 動画 (分かりづらかったらすみません)
|
|
764
|
+
|
|
765
|
+
|
|
766
|
+
|
|
767
|
+
クラスコンポーネントでの挙動
|
|
768
|
+
|
|
769
|
+
|
|
770
|
+
|
|
771
|
+
|
|
772
|
+
|
|
773
|
+
関数コンポーネントに置き換えて依存関係を解消した後の挙動
|
|
774
|
+
|
|
775
|
+
|