如何在Swift的方法中将字典作为参数传递? [英] How to pass dictionary as a parameter in the method in Swift?

问题描述

我在代码中创建了以下方法:

I have created following method in my code:

func SignIn(objDictionary:Dictionary<String,String>)
{
    //Body of method
}

在此方法中，我需要将以下字典作为参数传递，该参数定义如下:

I need to pass the following dictionary as a parameter in this method which is defined below:

let objSignInDictionary:Dictionary = ["email":emailTextField.text, "password":passwordTextField.text]

如何通过上述方法将此字典作为参数传递?

How can I pass this dictionary in the above method as a parameter?

应该注意，方法在另一个类中，我通过如下创建其对象来调用该方法:

This should be noted that method is in another class and I am calling the method by creating its object as follows:

let obj = Services()

SignIn在Services.swift类中定义 所以我想这样称呼它

SignIn is defined in Services.swift class so I am trying to call it like

obj.SignIn(objSignInDictionary) 

但出现以下错误

"String!" is not identical to "String"

我错在哪里以及如何解决.几天以来，我一直被困在这里.

Where I am wrong and how it can be fixed. I am stuck here since couple of days.

推荐答案

如果您按住ALT键并单击Xco​​de中的objSignInDictionary，您将看到其推断为[String : String!].您可以通过显式设置objSignInDictionary类型来解决此问题:

If you alt+click objSignInDictionary in Xcode you will see its inferred as [String : String!]. You can fix this by explicitly setting objSignInDictionary type:

let objSignInDictionary:[String:String] = ["email":emailTextField.text, "password":passwordTextField.text]

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