如何在react typescript中设置道具类型

Question

我学习打字稿。我想设置组件功能道具类型。但我不知道如何设置。

这是代码。

interface MovieProps {
    id: number;
    title: string;
    year: number;
}

function App() {
  ...
  const movies: MovieProps[] = [
    { id:1, title: 'movie1', year: 2018 },
    { id:2, title: 'movie2', year: 2019 },
    { id:3, title: 'movie3', year: 2020 },
    { id:4, title: 'movie4', year: 2021 },
  ];
  const renderMovies: JSX.Element[] = movies.map(movie => {
    return (
      <MovieCard key={ movie['id'] } movie={ movie } />
    );
  });
    ...
}

function MovieCard({ movie }: any) {  <- this part
  return (
    <div className="movie">
      <div className="movie-title">{ movie['title'] }</div>
      <div className="movie-year">{ movie['year'] }</div>
    </div>
  );
};

我不想设置“任何”。我设置了什么类型？

Answer 1

您可以使用箭头语法执行如下操作：

interface MovieProps {
    id: number;
    title: string;
    year: number;
}
....

const MovieCard:React.FC<MovieProps>=({ id, title, year})=> { 
  return (
    <div className="movie">
      <div className="movie-title">{ title }</div>
      <div className="movie-year">{year}</div>
    </div>
  );
}; 

Answer 2

更新类型如下：

function MovieCard({ movie }: {movie: MovieProps })

Answer 3

我会改变它，这样你就可以把道具传递给你想要使用的卡片，而不是容器对象作为道具。这也使得打字更简单。所以你可以这样做：

interface MovieProps {
    id: number;
    title: string;
    year: number;
}

function App() {
  ...
  const movies: MovieProps[] = [
    { id:1, title: 'movie1', year: 2018 },
    { id:2, title: 'movie2', year: 2019 },
    { id:3, title: 'movie3', year: 2020 },
    { id:4, title: 'movie4', year: 2021 },
  ];
  const renderMovies: JSX.Element[] = movies.map(movie => {
    return (
      <MovieCard key={ movie.id } {...movie} />
    );
  });
    ...
}

function MovieCard({ title, year }: MovieProps) {  <- this part
  return (
    <div className="movie">
      <div className="movie-title">{ title }</div>
      <div className="movie-year">{ year }</div>
    </div>
  );
};