try 通过React state management更新数组时，会填充状态数组，但用户界面无法更新.用户界面只有在我点击导航栏并重新路由到当前页面后才会更新(在这种情况下，useEffect不会再次运行，但UI会更新).

State Code

 const[isFetched, setIsFetched] = useState(false);
  const[balances, setBalances] = useState<IBalance[]>([]);
  
  const[num, setNum] = useState(0);

  useEffect(() => {
    console.log(balances);
    // LOGS A POPULATED ARRAY
    console.log(balances.length);
    // LOGS 0
  }, [balances]);
  
  useEffect(() => {
      const fetchBalances = async() =>{
        let bals:IBalance[] = await kryptikService.getBalanceAllNetworks(kryptikWallet);
        console.log("RECIEVED BALANCES:");
        console.log(bals);
        console.log(bals.length);
        setBalances(bals);
        setIsFetched(true);
      }
      fetchBalances();
    }, []);

UI Code

      <h2>Your Balances</h2>
      <Divider/>
      {
        !isFetched?<p>Loading Balances.</p>:
        <ul role="list" className="divide-y divide-gray-200 dark:divide-gray-700">
          {balances.map((balance:IBalance) => (
              <ListItem title={balance.fullName} imgSrc={balance.iconPath} subtitle={balance.ticker} amount={balance.amountCrypto}/>
          ))}
        </ul>
      }
    </div>

Fetch Handler (called in UseEffect)

    getBalanceAllNetworks = async(walletUser:IWallet):Promise<IBalance[]> =>{
    let networksFromDb = this.getSupportedNetworkDbs();
    // initialize return array
    let balances:IBalance[] = [];
    networksFromDb.forEach(async nw => {
        let network:Network = new Network(nw.fullName, nw.ticker);
        let kryptikProvider:KryptikProvider = await this.getKryptikProviderForNetworkDb(nw);
        if(network.getNetworkfamily()==NetworkFamily.EVM){
            if(!kryptikProvider.ethProvider) throw Error(`No ethereum provider set up for ${network.fullName}.`);
            let ethNetworkProvider:JsonRpcProvider = kryptikProvider.ethProvider;
            console.log("Processing Network:")
            console.log(nw.fullName);
            // gets all addresses for network
            let allAddys:string[] = await walletUser.seedLoop.getAddresses(network);
            // gets first address for network
            let firstAddy:string = allAddys[0];
            console.log(`${nw.fullName} Addy:`);
            console.log(firstAddy);
            console.log(`Getting balance for ${nw.fullName}...`);
            // get provider for network
            let networkBalance = await ethNetworkProvider.getBalance(firstAddy);
            console.log(`${nw.fullName} Balance:`);
            console.log(networkBalance);
            // prettify ether balance
            let networkBalanceAdjusted:Number = BigNumber.from(networkBalance)
            .div(BigNumber.from("10000000000000000"))
            .toNumber() / 100;
            let networkBalanceString = networkBalanceAdjusted.toString();
            let newBalanceObj:IBalance = {fullName:nw.fullName, ticker:nw.ticker, iconPath:nw.iconPath, 
                amountCrypto:networkBalanceString}
            // add adjusted balance to balances return object
            balances.push(newBalanceObj);
        }
    });
    return balances;
}

注意:数组是另一个引用，因此浅层相等性判断应该没有问题.当代码段显示为0时，数组中的第一个对象也会显示为0.任何帮助都将不胜感激！