Question

我试图获取位置，所以一开始我尝试保存纬度和经度，但是声明的变量从不返回任何内容。

这是我的代码：

public device_location: any = {};

constructor(private geolocation: Geolocation) {
this.setGeolocation();
this.getGeolocation();
}

setGeolocation(){
   this.geolocation.getCurrentPosition().then((resp) => {
       // resp.coords.latitude
       this.device_location.latitude = resp.coords.latitude;
       this.device_location.longitude = resp.coords.longitude;
       console.log( this.device_location.longitude);
       }).catch((error) => {
   console.log('Error getting location', error);
 });

 let watch = this.geolocation.watchPosition();
 watch.subscribe((data) => {
// data can be a set of coordinates, or an error (if an error occurred).
// data.coords.latitude
// data.coords.longitude
 });
}

getGeolocation(){
    console.log( JSON.stringify(this.device_location) );
    return this.device_location;
}

这是输出：

123.45600 {}

Answer 1

从构造函数中删除它：

this.getGeolocation();

，然后在此方法中这样调用它：

setGeolocation(){
this.geolocation.getCurrentPosition().then((resp) => {
   // resp.coords.latitude
   this.device_location.latitude = resp.coords.latitude;
   this.device_location.longitude = resp.coords.longitude;

   this.getGeolocation();



   console.log( this.device_location.longitude);
   }).catch((error) => {
   console.log('Error getting location', error);
});

Ionic v4-为什么我的get函数返回未定义？

1 个答案: