reactjs 解决拨打电话时在react中冻结的问题

kqhtkvqz  于 2023-03-29  发布在  React
关注(0)|答案(1)|浏览(126)

我正在尝试设置一个微调器,而我的React应用程序进行了几次调用。我正在用Web3和Solidity编写一个DApp。在调用我的智能合约时,我试图设置状态以显示微调器,但在调用合约时,整个应用程序冻结了。在进行调用并返回值之后,它会快速设置微调器并取消设置微调器(你可以看到值更改控制台记录布尔值)。应用程序解冻并继续。我如何让微调器设置和应用程序不冻结,而调用:

onSubmit(e) {
    e.preventDefault();
    // inProcessOfCalling sh
    this.setState({ inProcessOfCalling: true });
    ...
    const contractData = callContract(parseTestJson.steps, web3);
    Promise.all(contractData).then((values) => {
        ...
        // turn spinner off
        this.setState({ inProcessOfCalling: false });
    });
}

function callContract(callInfo, web3) {
    const dataArr = [];
    for (let i = 0; i < callInfo.length; i += 1) {
        // ...
        const getData = thisContract[callInfo[i].func].getData(
            ...callInfo[i].args,
            { from: callInfo[i].from },
        );
        // ...
        const trans = web3.eth.sendTransaction({
          to: callInfo[i].contract,
          from: callInfo[i].from,
          data: getData,
        });
        let receipt = web3.eth.getTransactionReceipt(trans);
        returnObj = {
          receipt,
          testName: callInfo[i].name,
          expectPassed: callInfo[i].expects.success === transactionPassed,
          expectMessage: callInfo[i].expects.message,
        };
        dataArr.push({ error: false, returnObj });
    }
    return dataArr;
}

我不认为这是一个web3的问题。我会假设它会冻结应用程序与作出任何多个提取调用的api。

46scxncf

46scxncf1#

您已经调用了callContract函数,该函数很重,这里的请求〈-这是导致hang的请求
const contractData = callContract(parseTestJson.steps, web3);在你把它放入Promise之前就已经被调用了。all
contractData根本不是Promise,你可以这样在函数内部返回Promise对象

function callContract(callInfo, web3) {
  return new Promise((resolve, reject) => {
      const dataArr = [];
      for (let i = 0; i < callInfo.length; i += 1) {
        // ...
        const getData = thisContract[callInfo[i].func].getData(
          ...callInfo[i].args, {
            from: callInfo[i].from
          },
        );
        // ...
        const trans = web3.eth.sendTransaction({
          to: callInfo[i].contract,
          from: callInfo[i].from,
          data: getData,
        });
        let receipt = web3.eth.getTransactionReceipt(trans);
        returnObj = {
          receipt,
          testName: callInfo[i].name,
          expectPassed: callInfo[i].expects.success === transactionPassed,
          expectMessage: callInfo[i].expects.message,
        };
        dataArr.push({
          error: false,
          returnObj
        });
      }
      resolve(dataArr);
    }
  }

了解更多关于promise的信息https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise

相关问题