如何重置提交按钮的状态 react redux

Question

我一直在努力重置 handleSubmit 函数的状态。有 3 个问题一个接一个地提交，接下来的 3 个问题应该像 1/3、2/3 和 3/3 一样出现，这个过程一直持续到所有问题都没有提交。这是下面的代码：

const Quiz = () => {
    const { questions, quiz, options } = useSelector((state) => state.quiz);
    
    const [currentQuestion, setCurrentQuestion] = useState(0);
    console.log(currentQuestion[number] + "1q");
    
    const dispatch = useDispatch();
    const history = useHistory();
    const location = useLocation();
    const classes = useStyles();
    

    // this is to get the questions from the history coming from redux store.
    useEffect(() => {
        if (!questions) {
            dispatch(fetchQuestions(history));
        }
    }, []);

      const handleRadioChange = (number, event) => {
        let currentSelection = questions.find(question => question.number === number);
        console.log(currentSelection + "radio selected");
        currentSelection.value = event.target.value;
        console.log(currentSelection.value + "calculate score");
        // Set the new question count based on the current one
        setCurrentQuestion((current) => {
          return Math.min(
            current + 1,
            questions.length - 1
          );
        });
    };

    const handleSubmit = (event) => {
        event.preventDefault();
const valid = questions.some((q) => !q.value);
        console.log(valid + "questionsalpha");
        if (!valid) {
            dispatch(postQuiz({ responses: questions, id: quiz.id }, history));
        }
// this i added to get the question process repeat as earlier, but not working.
    setCurrentQuestion((current) => {
            return Math.min(
              current + 1,
              questions.length - 1
            );
          });
    };
    return (
        !questions?.length ? <CircularProgress /> : (
            <Grid className={classes.container} container alignItems="stretch" spacing={1}>
                <form onSubmit={handleSubmit}>
                    {/* Only show the question if it's index is less than or equal to the current question */}
                    {questions.map((question, index) => {return index <= currentQuestion ? (
                        <FormControl component="fieldset" key={question.number} className={classes.formControl} data-hidden={question.number !== current_question[question.number]}>
                            <FormLabel component="legend">{question.question}</FormLabel>
                            <RadioGroup aria-label="quiz" name="quiz" value={question.value} onChange={(e) => handleRadioChange(question.number, e)}>
                                {options.map((option) => 
                                    <FormControlLabel key={option.score} value={option.score} control={<Radio />} label={option.label} />
                               )}
                            </RadioGroup>
                        </FormControl>
                    ) : null})}
                    <Button type="submit" variant="outlined" color="primary" className={classes.button}>
                        Submit
                </Button>
                </form>
            </Grid>
        )
    );
};

export default Quiz;

当用户提交表单时，问题应该一个接一个地出现，如果用户在中间刷新页面，它应该显示他离开时的同一页面，而不是新的 url。请帮忙

Answer 1

您的 handleSubmit 应将状态重置为 0：

const handleSubmit = (event) => {
    event.preventDefault();
    const valid = questions.some((q) => !q.value);
    console.log(valid + "questionsalpha");
    if (!valid) {
        dispatch(postQuiz({ responses: questions, id: quiz.id }, history));
    }
    // Reset to zero, and let handleRadioChange increase it
    setCurrentQuestion(0);
};
    ```

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