[英]Custom hook function not being called in React
我正在尝试调用我的fetchPlants
function,但我无法弄清楚为什么它没有被调用。
/screens/RecipeScreen.js
import usePlants from '../hooks/usePlants';
// Call our custom hook
const [fetchPlants, plantResults] = usePlants();
// ...other code...
<RecipeSearch
recipeSearch={recipeSearch}
onRecipeSearchChange={setRecipeSearch}
onRecipeSearchSubmit={() => fetchPlants(recipeSearch)}
/>
/components/RecipeSearch.js
const RecipeSearch = ({
onRecipeSearchChange,
onRecipeSearchSubmit,
recipeSearch,
}) => {
return (
console.log(recipeSearch); // This prints out nicely...
<View>
<View>
<TextInput
placeholder='Find a plant...'
value={recipeSearch}
onChangeText={onRecipeSearchChange}
onEndEditing={onRecipeSearchSubmit}
/>
</View>
</View>
);
};
/hooks/usePlants.js
import { useState, useEffect } from 'react';
import plantsApi from '../api/plants';
export default () => {
const [plantResults, setPlantResults] = useState([]);
const fetchPlants = async searchTerm => {
console.log('searchTerm... HERE IS THE QUERY', searchTerm); // this never gets hit
try {
const response = await plantsApi.get('').then(response => {
console.log(response);
setPlantResults(response);
});
} catch (err) {
console.log(err);
}
};
return [fetchPlants, plantResults];
};
我最初认为可能我调用fetchPlants()
太早了(在recipeSearch
有任何状态之前),但我不这么认为,因为它仍然能够正确地console.log(searchRecipe)
。
更新它一直在工作。 当我使用 iOS 模拟器对其进行测试时,我需要在计算机上按“ENTER”键,因为我使用的是 React Native onEndEditing
道具。
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