无法将“NSMutableURLRequest"(0x11beb7040)类型的值转换为“Alamofire.URLRequestConvertible"(0x11beb9040) [英] Could not cast value of type 'NSMutableURLRequest' (0x11beb7040) to 'Alamofire.URLRequestConvertible' (0x11beb9040)

问题描述

当构建我的代码时，在 Alamofire.request(request as!URLRequestConvertible).responseJSON() 上崩溃.请建议如何解决此崩溃

when build my code then crash on Alamofire.request(request as! URLRequestConvertible).responseJSON(). pls suggest how to fix this crash

let url = NSURL(string: "https://jsonplaceholder.typicode.com/users")
let request = NSMutableURLRequest(url:url! as URL)
request.httpMethod = "GET"
request.setValue("application/json", forHTTPHeaderField: "Content-Type")

Alamofire.request(request as! URLRequestConvertible).responseJSON(){ response in

       switch response.result
       {
          case .success(let data):                
             print(" i got my Data Yup",data)          
          case .failure(let error):
             print(error)                                
        }
    }

推荐答案

在 Swift 3 中，您只需将 NSMutableURLRequest 更改为 URLRequest 即可.没必要投.此外，设置 var 以便它可以快速可变.:) 谢谢，马库斯发表评论.

In Swift 3, all you have to do is to change NSMutableURLRequest to URLRequest and it will work. No need to cast. Also, set var so it can be swift mutable. :) Thanks, Markus for comment.

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