我正在使用反应导航在屏幕之间导航。我有一个主屏幕(Main.js)和一个名为(Favorites.js)的屏幕。
我使用此功能转到我的收藏夹屏幕。
_btnFavoritos = async () => {
const movies = this.state.myFavorites;
console.log("Abrir Favoritos");
console.log(movies);
this.props.navigation.navigate('screenFavoritos', { movies: movies });
};
怎么有回调函数,以便当我退出收藏夹屏幕并返回主屏幕时,触发能够更新主屏幕的功能?
答案 0 :(得分:1)
没话题,但是我会从async
中删除_btnFavoritos
关键字,除非您的函数有更多需要它的代码并且您根本没有在此处添加它
解决方案:
_btnFavoritos = () => {
const movies = this.state.myFavorites;
console.log("Abrir Favoritos");
console.log(movies);
this.props.navigation.navigate('screenFavoritos',
{
movies: movies,
updateMain: () => this.updateMain()
});
};
updateMain = () => {
// Sample update logic
fetch('https://someEndpoint.com')
.then(res => res.json())
.then(json => this.setState({ movies: json })
.catch(err => console.warn(err.message)
}
Favorites.js
componentWillUnmount(){
const { params } = this.props.navigation.state
params && params.updateMain && params.updateMain() // Checking that the function was passed down
// as a navigation prop before executing
}