'NSInvalidArgumentException'，原因:“带有Alamofire swift3的JSON写入(

本文介绍了'NSInvalidArgumentException'，原因:“带有Alamofire swift3的JSON写入(_SwiftValue)中的无效类型"的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

使用XCode8上传Swift3时遇到以下错误.

I've encountered following error while uploading Swift3 using XCode8.

'NSInvalidArgumentException'，原因:'JSON写入中的类型无效 (_SwiftValue)'

'NSInvalidArgumentException', reason: 'Invalid type in JSON write (_SwiftValue)'

let param: Parameters = [ "email":txrNRC.text as AnyObject, "password":txtPassword.text as AnyObject ]

请让我知道如何解决该问题.我已经尝试使用let param: NSDictionary，但收到了相同的错误消息.

Please let me know how to solve that issue. I've already tried with let param: NSDictionary but got same error message.

推荐答案

首先，在Swift 3中，id的Objective-C等效项是Any而不是AnyObject，这也避免了AnyObject强制转换

First of all in Swift 3 the Objective-C equivalent of id is Any rather than AnyObject, that avoids also the AnyObject castings.

错误消息表明使用了非法类型(Parameters)，JSON仅支持string，number，<null>和array/dictionary.

The error message indicates that an illegal type is used (Parameters), JSON supports only string, number, <null> and array / dictionary.

如果您的词典是[String:String]，则根本不需要类型注释

In your case the dictionary is [String:String], a type annotation is not needed at all

let param = [ "email" : txrNRC.text, "password" : txtPassword.text ]

如果txrNRC和txtPassword是可选的，则您需要解开它们，或者如果值是nil

If txrNRC and txtPassword are optionals you need to unwrap them or use the nil coalescing operator to assign a placeholder if the value is nil