TSLint返回期望的任務或函數調用

Question

我正在用tslint檢查我的角度項目，並且我得到了這個錯誤，我不明白原因。錯誤是：預計轉讓或函數調用

getInfoPrinting() { 
this.imprimirService.getInfoPrinting().subscribe(
    response => { 
    this.loading = false; 
    this.printingOrders = response.data; 
    this.totalNumberOfCharacters = 0; 
    this.totalNumberOfCharactersNext = 0; 
    if (this.printingOrders.labelPresentOrder && this.printingOrders.labelPresentOrder.lines) { 
     this.printingOrders.labelPresentOrder.lines.forEach(
     line => { 
      this.totalNumberOfCharacters += line.length; 
     } 
    ); 
    } 
    if (this.printingOrders.labelNextOrder && this.printingOrders.labelNextOrder.lines) { 
     this.printingOrders.labelNextOrder.lines.forEach(
     line => { 
      this.totalNumberOfCharactersNext += line.length; 
     } 
    ); 
    } 
    if (this.printingOrders.printing) { 
     this.suscribeNotifications(); 
    } 
    } 
), err => { 
    this.loading = false; 
    this.alertService.error(INFO_NO_EXISTEN_ORDEN_PREPARADA); 
    this.hasAlert = true; 
}; 

}

的錯誤是在這一行：

this.imprimirService.getInfoPrinting().subscribe(

我在做什麼錯？

謝謝。

Answer 1

您的代碼不正確。取而代之的

getInfoPrinting() { 
    this.imprimirService.getInfoPrinting().subscribe(
     response => { 
     ... 
     } 
    ), err => { 
     ... 
    }; 
} 

應該

getInfoPrinting() { 
    this.imprimirService.getInfoPrinting().subscribe(
     response => { 
     ... 
     }, 
     err => { 
     ... 
    }); 
} 

的錯誤將是很容易被發現，如果方法體爲短。你應該委託給你的回調中的一個單獨的方法。