//

 //  ViewController5.swift

 //  SwiftBasicDemo

 //

 //  Created by 思 彭 on 16/11/16.

 //  Copyright © 2016年 思 彭. All rights reserved.

 // 错误处理

 import UIKit

 class ViewController5: UIViewController {

     override func viewDidLoad() {

         super.viewDidLoad()

         self.title = "错误处理"

         // 1.函数内的 throws异常处理

         func send(job: Int, toPrinter printrName: String) throws ->String {

             if  printrName == "Never Has Toner" {

                 throw PrintError.noToner

             }

             return  "Job sent"

         }

         // 2.do...catch处理异常   输出： Job sent

         do {

             let  printerresponse = try send(job: , toPrinter: "Bi Sheng")

             print(printerresponse)

         }catch {

             print("error = \(error)")

         }

         // 3.

         do {

             let printerResponse = try send(job: , toPrinter: "Gutenberg")

             print(printerResponse)

         } catch PrintError.onFire {

             print("I'll just put this over here, with the rest of the fire.")

         } catch let printerError as PrintError {

             print("Printer error: \(printerError).")

         } catch {

             print(error)

         }

     }

     // 定义“打印错误”的枚举

     enum PrintError: Error {

         case outOfPaper

         case noToner

         case onFire

     }

 }