從方法Typescript訪問全局變量

Question

嘿傢伙我想知道如何從2個方法中訪問全局範圍（this）中的變量。幫助讚賞

location: any; 

    doSomethingOne() { 
    Geolocation.getCurrentPosition().then((resp) => { 
       this.location = resp; 
       this.doSomething(); 

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

    doSomething() { 
     return new Promise(resolve => { 
     this.http.get('http://xxxxxxxxx.xxxx/api/' + this.location.coords.latitude + '/' + this.location.coords.longitude + '/5') 
      .map(res => res.json()) 
      .subscribe(data => { 
       this.data = data; 
       resolve(this.data); 
      }); 
    }); 
    } 

如何從Promise中訪問this.location？控制檯顯示 '未定義' 訪問它

Answer 1

試試這個

doSomethingOne(): Observalbe<any> { 
    Geolocation.getCurrentPosition().then((resp) => { 
       return new Promise(resolve => { 
     return this.http.get('http://xxxxxxxxx.xxxx/api/' + resp.coords.latitude + '/' + resp.coords.longitude + '/5') 
      .map(res => res.json()) 
      .subscribe(data => { 
       this.data = data; 
       return resolve(this.data); 
      }); 
     }); 

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