Question

当按钮单击触发createPlaylist（）时，该函数无法执行asd（）。我尝试在同一个功能上完成所有操作，但我得到了同样的功能。 console.log（resp）从不记录。那是为什么？

    createPlaylist(token:string = localStorage.getItem('myToken')) {

      const url = `https://api.spotify.com/v1/users/${this.currentUser}/playlists`;
      const headers = new Headers();
      headers.append('Authorization', 'Bearer ' + token);
      headers.append('Content-Type', 'application/json');
      const body = {
        'name': 'searchDDD playlist'
      };
      this.http.post(url, body, { headers } )
      .subscribe(res => {
        console.log(res.json().name);
        console.log(res.status);
        this.playlistID = res.json().id;
        this.asd();
      });


    }

    asd(token:string = localStorage.getItem('myToken')){
      const url = `https://api.spotify.com/v1/users/${this.currentUser}/playlists/${this.playlistID}/tracks?`;
      const body = {'uris': ['spotify:track:4iV5W9uYEdYUVa79Axb7Rh',
      'spotify:track:1301WleyT98MSxVHPZCA6M']};
      const headers = new Headers();
      headers.append('Authorization', 'Bearer ' + token);
      headers.append('Content-type', 'application/json');
      this.http.post(url, body, { headers } ).map(resp => {
        console.log(resp);
    });
}

Answer 1

没有"1.39.25.1".succ #=> "1.39.25.2"（或subscribe()或其他一些实际执行observable的人）observables将不会做任何事情，因为它们是懒惰的

forEach()

函数不在Angular2上执行

1 个答案: