Question

请，我想通过API遍历此json响应，当我将其登录到控制台时，我一直未定义。

   {
              "results": {
                  "AF": {
                      "alpha3": "AFG",
                      "currencyId": "AFN",
                      "currencyName": "Afghan afghani",
                      "currencySymbol": "؋",
                      "id": "AF",
                      "name": "Afghanistan"
                  },
                  "AI": {
                      "alpha3": "AIA",
                      "currencyId": "XCD",
                      "currencyName": "East Caribbean dollar",
                      "currencySymbol": "$",
                      "id": "AI",
                      "name": "Anguilla"
                  },
                  "AU": {
                      "alpha3": "AUS",
                      "currencyId": "AUD",
                      "currencyName": "Australian dollar",
                      "currencySymbol": "$",
                      "id": "AU",
                      "name": "Australia"
                  }
                }
            }

这是我的代码：

async function currency() {
    const response = await fetch(`https://free.currencyconverterapi.com/api/v5/currencies`);
    const json = await response.json();
    //console.log(json.results);
    for (key in json.results) {
    
        for(x in key){
            console.log(x)
        }

    
    }
    
}

请问我在做什么错

Answer 1

我相信下面的小修改就足够了...让我知道它是否有效。

async function currency() {
    const response = await fetch(`https://free.currencyconverterapi.com/api/v5/currencies`);
    const json = await response.json();
    //console.log(json.results);
    for (key in json.results) {

       for(x in json.results[key]){
           console.log(json.results[key][x])
       }

    }

}

Answer 2

将您的json obj转换为Map Object或Set Object。然后您可以尝试遍历

var myMap = new Map（）; myMap.set（jsonResp）;

用于（让myMap.keys（）的数据）{console.log（data）; }

Check here for more information

然后。 More details here

Answer 3

我不是异步/等待的经常用户，但我认为正确的方法是

async function currency() {
    const response = await fetch(`https://free.currencyconverterapi.com/api/v5/currencies`);
    const json = await response.json();  
    return json;      
}
currency().then(data=>{
    console.log(data);
});

遍历JSON响应对象

3 个答案: