我知道我的问题已经问了,但我不这样认为:
我想在减速机上删除一个项目,但我尝试的所有方法均无效。
我尝试了很多事情,但是在此之后2天,我想我需要帮助!
这是调度员:
store.dispatch({
type: 'REMOVE_COIN',
payload: {
id:coinId
}
})
这是减速器:
const intialState = {
}
const coinReducer = (state = intialState, action) => {
switch(action.type){
case "REGISTER_COIN":
return {
...state,
[action.payload.id]: {
id:action.payload.id,
position:action.payload.position,
}
}
case "REMOVE_COIN":
const newState = Object.assign([], state)
// console.log(newState)
// if (newState.includes(Object(action.payload.id)) > -1) {
// console.log('OUI')
// }else{
// console.log('NON')
// }
// const newState = [...state]
// const index = newState.findIndex(coin => coin.id == action.payload.id)
// if (index !== -1) {
// newState.splice(index, 1);
// console.log(newState)
// }
const finalState = newState.filter(coin => coin.id !== action.payload.id)
console.log(finalState)
// const coinId = action.payload.id
// // console.log(newState)
// const indexOfCatToDelete = newState.findIndex(coin => coin.id == String(action.payload.id))
// console.log(indexOfCatToDelete)
// newState.splice(indexOfCatToDelete, 1)
// console.log(newState)
// return newState
// return {
// state : newState.filter( (item, index) => index !== action.index)
// }
// return finalState
// const numIndex = parseInt(action.index)
// return {
// state: [
// ...state.slice(0, numIndex),
// ...state.slice(numIndex+ 1)
// ]
// }
default:
return state
}
}
export default coinReducer
我让所有评论都显示了我尝试过的所有内容。
感谢您的帮助!
答案 0 :(得分:0)
您需要将您的初始状态作为数组来起作用。或向其中添加coins
属性,该属性是一个数组:
const initialState = [];
// Or
const initialState = {coins: []}
确保您确实收到了action
的{{1}},然后可以在化简器中返回过滤后的状态:
payload.id
编辑:回头看一下减速器,我注意到您将状态作为对象,其中硬币ID是一个道具。在这种情况下,您需要通过对象键来过滤状态:
case "REMOVE_COIN":
// OR state.coins.filter if that's what you have on the state
return state.filter(coin => String(coin.id) !== String(action.payload.id));