Question

getData() {
this.http.get(`https://api.covid19api.com/total/country/${this.country}/status/confirmed?from=2020-04-01T00:00:00Z&to=2020-05-01T00:00:00Z`).subscribe(res => {
  console.log('Res: ', res);

  this.chartData[0].data = [];
  this.chartLabels = [];

  for (let entry of res) {
    // splitting Date from Date and Time that was provided from dataset
    this.chartLabels.push(entry.Date.split('T')[0]);
    this.chartData[0].data.push(entry['Cases']);
  }
  console.log('data: ', this.chartData);
});
}

Error message

大约2天前，让此函数从API调用数据，但是当我今天再次尝试“离子服务”该项目时，我遇到了编译错误。之前曾出现此错误，但我寻求帮助，我的一位朋友告诉我，这是TS的侧边错误，可以忽略。

该错误似乎来自“ res”对象。我是一名新编码员，所以简单的说明将非常有帮助！

我很困惑，请问是否需要更多信息。

谢谢！

新的stackoverflow用户

Answer 1

问题在您的放置对象中，检查该对象

//sample object and it goes iterator
let res = [1,2,3,4,4];

  for (let entry of res) {
    console.log('data: ', entry);
  }

Answer 2

getData() {
this.http.get(`https://api.covid19api.com/total/country/${this.country}/status/confirmed?from=2020-04-01T00:00:00Z&to=2020-05-01T00:00:00Z`).subscribe((res:any) => 
{
  console.log('Res: ', res);

  this.chartData[0].data = [];
  this.chartLabels = [];

  for (let entry of res) {
    // splitting Date from Date and Time that was provided from dataset
    this.chartLabels.push(entry.Date.split('T')[0]);
    this.chartData[0].data.push(entry['Cases']);
  }
  console.log('data: ', this.chartData);
});
}

将第2行从“ .subscribe（res => {” 至 “ .subscribe（（res：any）=> {”似乎有效。

IONIC错误TS2488：类型“对象”必须具有返回迭代器的“ [Symbol.iterator]（）”方法

2 个答案: