[英]React-Redux. After changing state by useDispatch, components not updating by useSelector
[英]React Redux state not changing after calling useDispatch()
我正在嘗試在我的基於網絡的游戲中使用更新版本的 react redux v8.0.2
來將 state 保留在我的應用程序中,而不必在導航調用之間傳遞狀態。
不幸的是,我遇到了一個問題,即播放器 state 第一次被初始化,但最終的 state 在調用useDispatch()
方法后沒有更新。 我試過在網上到處尋找,但目前沒有一個解決方案真正解決了我的問題。
我什至強制我的功能組件重新渲染,這仍然只是返回我的播放器的初始 state,而不是我期望的更新的。 誰能幫我弄清楚我在這里缺少什么。 它必須是 redux 表格/文檔中未提及的小問題。 蒂亞!
playerSlice.js
import {createSlice} from '@reduxjs/toolkit';
export const playerSlice = createSlice({
name: 'player',
initialState: {
address: '',
cp: 0,
created: '',
faction: 0,
faction_selected: false,
games_lost: 0,
games_won: 0,
online: false,
selected_char: 0,
selected: {
combatType: '',
lvl: 0,
mgc: 0,
str: 0,
rng: 0,
def: 0
},
time_played: 0,
tokens: 10000,
total_cp: 0,
total_earned: 0,
user_name: ""
},
reducers: {
setInit: (state,action) => {
state = action.payload;
},
setCP: (state,action) => {
state.cp += action.payload;
},
setFaction: (state,action) => {
state.faction = action.payload;
},
setGamesLost: (state,action) => {
state.games_lost = action.payload;
},
setGamesWon: (state,action) => {
state.games_won = action.payload;
},
setPlayerState: (state,action) => {
state = {
...state,
...action.payload
}
}
}
});
export const {setInit, setCP, setFaction, setGamesLost, setGamesWon, setPlayerState} = playerSlice.actions;
export const selectPlayer = (state) => state.player;
export default playerSlice.reducer;
index.js
import {configureStore} from '@reduxjs/toolkit';
import playerReducer from '../store/playerSlice';
export default configureStore({
reducer: {
player: playerReducer,
},
})
選擇.js
import Card from './Card';
import React, {useState, useEffect} from 'react';
import '../stylesheet/Selection.css';
import Logo from '../assets/degen age title GNW skull.png';
import KnightTitle from '../assets/knights title.png';
import GoblinTitle from '../assets/goblins title.png';
import WizardTitle from '../assets/wizards title.png';
import ElfTitle from '../assets/elves title.png';
import SorcererShield from '../assets/sorcerers shield item.jpg';
import Weaken from '../assets/weaken item img.jpg';
import Barrage from '../assets/barrage item img.jpg';
import Berserk from '../assets/berserk item img.jpg';
import {db} from '../firebase/firestore';
import {addDoc,collection, serverTimestamp} from 'firebase/firestore';
import { useNavigate, useLocation } from 'react-router-dom';
import {CHAR_RACES} from '../constants';
import {useSelector, useDispatch} from 'react-redux';
import {setInit, selectPlayer} from '../store/playerSlice';
const SCREEN_DELAY = 4000; // delay in ms
const Selection = () => {
const [initScreen, setInitScreen] = useState(true);
const player = useSelector(selectPlayer);
const dispatch = useDispatch();
const navigate = useNavigate();
const [ready,setReady] = useState(false);
const {state} = useLocation();
useEffect(() => {
let mounted = true;
if(mounted){
setTimeout(() => {
setInitScreen(false);
},SCREEN_DELAY);
}
return () => {
mounted = false;
}
},[]);
const handleFactionSelect = async (_faction) => {
// add new player to db
const ref = collection(db, 'players');
const playerData = {
address: state.address,
cp: 0,
created: serverTimestamp(),
faction: _faction,
faction_selected: true,
games_lost: 0,
games_won: 0,
online: true,
selected_char: 0,
selected: {
combatType: 'MELEE',
lvl: 200,
mgc: 10,
str: 59,
rng: 30,
def: 101
},
time_played: 0,
tokens: 10000,
total_cp: 0,
total_earned: 0,
user_name: "someUser393900"
}
dispatch(setInit({
...playerData,
created: new Date().getTime(),
faction: _faction
}))
console.log({player});
// set in redux as well****
// addDoc(ref,playerData).then(res => {
// if(res.id){
// const _faction = CHAR_RACES[playerData.faction];
// dispatch(setInit({
// ...playerData,
// created: new Date().getTime(),
// faction: _faction
// }))
// // navigate('/play',{
// // state: {
// // player: {
// // ...playerData,
// // faction: _faction
// // }
// // }
// // });
// navigate('/play');
// }
// }).catch(error => {
// console.error(error);
// })
}
return (
<div className='select-main'>
{!initScreen ? <div id="main-select" className='fade-in-slow2 select-wrapper'>
<h1 className='text-center'>CHOOSE YOUR SIDE</h1>
<div className='select-cards'>
<Card cardStyle="f1" ability={SorcererShield} desc="Sorcerers Shield" title={WizardTitle} name={1} onClick={handleFactionSelect} />
<Card cardStyle="f3" ability={Berserk} desc="Berserk" title={KnightTitle} name={2} onClick={handleFactionSelect} />
<Card cardStyle="f2" ability={Barrage} desc="Barrage" title={ElfTitle} name={0} onClick={handleFactionSelect} />
<Card cardStyle="f4" ability={Weaken} desc="Weaken" title={GoblinTitle} name={3} onClick={handleFactionSelect} />
</div>
</div> :
<div className='fade-in-slow sub-select-wrapper flex-just-center'>
<div className='cracked'></div>
</div>
}
</div>
)
}
export default Selection;
如您所見,我正在嘗試從我的 redux 存儲中調用setInit
減速器,然后在此之后記錄新的 state。 我也知道嘗試在之后直接記錄 state 並不總是反映最新的數據,但我嘗試通過將 state 更改添加到我的組件並記錄播放器 Z9ED39E2EA931586B6A985A6942EF57 之后再次獲取相同的數據並返回。 沒有什么變化。
您嘗試通過執行export const selectPlayer = (state) => state.player;
,但您的 state 不包含播放器。
還要使用帶有useSelector()
export const selectPlayer = createSelector((state) => state, (state) => state.player);
選擇器,您必須使用createSelector()
方法創建選擇器,如下所示:
我認為你的initialState
就是你的player
,所以如果你想訪問它,你只需要返回你的state
。
這可能會對您有所幫助: https://redux-toolkit.js.org/api/createSelector
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