我試圖更新存儲在數組中的對象。但得到 TypeError: prevState.blockHash 是不可迭代的。這是我的構造函數constructor(props) {  super(props)  this.state = {    dir:"",    account: '',    name: [],    fido: [{      logIndex: [],      transactionIndex: [],      transactionHash: [],      blockHash: []    }],    loading: true  }我以這種方式設置狀態-showusingBot= () => {  this.setState(this.initialState)  this.state.instance.events.Artworkcreated({    filter: { purchased: false},    fromBlock: 0  }).on('data', event => {    this.setState(prevState =>({      fido:[...prevState.fido.map({blockHash: [        ...prevState.blockHash,           event.blockHash              ]} )]}));    })  }我在控制臺上的 ABI 響應如下。{logIndex: 0, transactionIndex: 0, transactionHash: "0x94f6d8671988ceb8ef1da862257637a198f4afefc3aef6cf3eb992dfcafb0eb1", blockHash: "0xd26937f8535a335663c9af57335f7cc783aba0e9e376408cbb92c1b3f1b28166", blockNumber: 20, …}logIndex: 0transactionIndex: 0transactionHash: "0x94f6d8671988ceb8ef1da862257637a198f4afefc3aef6cf3eb992dfcafb0eb1"blockHash: "0xd26937f8535a335663c9af57335f7cc783aba0e9e376408cbb92c1b3f1b28166"blockNumber: 20address: "0x20B40e09b75a21E0B857F695dE5De92a5A5b5AD0"type: "mined"id: "log_0d967aac"returnValues: Result0: "1"1: "bhavin"2: "masterpiece"3: "1000000000000000000"4: "100"5: "200"6: "blah blah blah!!"7: "0x04f78093E2a1C07BF6c4527Aaa00807d3132A1Df"8: falseid: "1"Artistname: "bhavin"Artname: "masterpiece"price: "1000000000000000000"width: "100"height: "200"Description: "blah blah blah!!"owner: "0x04f78093E2a1C07BF6c4527Aaa00807d3132A1Df"purchased: false__proto__: Objectevent: "Artworkcreated"signature: "0xf912339172a3b7eda9cb10ecdef181d10a74fc4411fe5d7e62f550ef3698d845"raw: {data: "0x000000000000000000000000000000000000000000000000…16820626c6168212100000000000000000000000000000000", topics: Array(4)}__proto__: Object我需要將一個字符串推送到數組blockHash。