Angular2在訂閱中解析承諾？

Question

有什麼辦法讓這個僞代碼起作用嗎？

private letsSee(): Promise<any> { 
    return new Promise(resolve => { 
    this.someService.someValue.subscribe((nextValue) => { 
     resolve(nextValue); 
    }); 
    }); 
} 

Answer 1

轉換可觀察到Pormise：

private letsSee(): Promise<any> { 
    return this.someService.someValue.toPromise(); 
}