Angular 2 typecript调用void方法等待该方法执行完成，然后再执行下一步

Question

我们需要在typescript中调用返回类型为void的方法，但类型脚本不应该继续执行下一行代码void方法执行完成。我们怎样才能做到这一点。

在下面的例子中，我们必须从closeWindow调用saveEventDetails，但是在关闭窗口中var win = window.open（“about：blank”，“_self”）; win.close（）;在saveEventDetails方法执行完成之前不应执行。

EX： -

saveEventDetails(buttonClick: string = "") {   
     this.eventForm.markAsUntouched(false); 
     this.eventForm.value.claimNumber = this.appContext.claimNumber; 
     this.eventsService.patch(this.eventForm.value).subscribe(res => { 
      this.loadUserTrackingDetails(); 
      this.userTrackingService.saveUserTrackingDetails(this.userTrackingModel).subscribe(r => { 
       if (buttonClick == "") { 
        this.showSuccess(); 
       } 
       return Observable.of(); 
      }); 
     }, (errResp: any) => { 
     this.errorMessage = "Unable to load EVENT, invalid user or claim number"; 
      return Observable.of(); 
     }); 
    } 




    closeWindow() { 
     this.eventForm.value.cmResidentStateLicensed = false; 
     Observable.create((observer: Observer<any>) => { 
      this.saveEventDetails("popup") 
      var v = true; 
     })    
      .subscribe(data => {     
       var win = window.open("about:blank", "_self"); 
       win.close(); 
      }, 
      (errResp: any) => { 
       this.errorMessage = "Unable to Save EVENT, Please try after soemtime"; 
      });  



    } 

Answer 1

为什么你不订阅由该saveEventDetails返回的观察，（）？

closeWindow() { 
    this.eventForm.value.cmResidentStateLicensed = false; 
    this.saveEventDetails("popup").subscribe(data => {     
     var v = true; 
     var win = window.open("about:blank", "_self"); 
     win.close(); 
    }, 
    (errResp: any) => { 
     this.errorMessage = "Unable to Save EVENT, Please try after soemtime"; 
    });  
}