返回值未定义

Question

我需要获取我的纬度和经度。在我的函数中，它 returns 非常好，但是如果我尝试调用相同的 this.latitude 但功能失效，它 returns 为未定义。

localizar() {

this.geolocation.getCurrentPosition().then((position) => {

  this.latitude = position.coords.latitude;
  this.longitude = position.coords.longitude;

  // Here it returns
  console.log('teste: ', this.latitude, this.longitude);

})
// Here returns as undefined
console.log('lat: ', this.latitude, 'lng: ', this.longitude)

}

Answer 1

您可以使用 async/await 个功能。

async localizar() {
    const position = await this.geolocation.getCurrentPosition();
    this.latitude = position.coords.latitude;
    this.longitude = position.coords.longitude;

    // your logic here
}

有关 async functions and Promises 的更多信息：

Answer 2

async localizar() {
  const position = await this.geolocation.getCurrentPosition();
  this.latitude = position.coords.latitude;
  this.longitude = position.coords.longitude;

  // your logic here
}

返回值未定义

Value returning as undefined

angularjs

typescript

ionic-framework