React native 从屏幕返回时对导航执行功能作出反应
我正在使用react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React native 从屏幕返回时对导航执行功能作出反应,react-native,react-navigation,React Native,React Navigation,我正在使用react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('
_btnFavoritos = async () => {
const movies = this.state.myFavorites;
console.log("Abrir Favoritos");
console.log(movies);
this.props.navigation.navigate('screenFavoritos', { movies: movies });
};
怎么可能有一个回调函数,当我退出收藏夹屏幕并返回主屏幕时,我触发一个能够更新主屏幕的函数?不在主题范围内,但我会从
\u btnFavoritos
中删除async
关键字,除非您的函数有更多需要它的代码,并且您根本没有添加它在这里
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
}
可能重复的