无法为类型为nsdictionary的类型的参数列表(对象:字符串?用于键[]字符串)调用初始化程序 [英] Cannot invoke initializer for type nsdictionary with an argument list of type(objects:String?for key [] string)

问题描述

我想将我的数据以键值对的形式添加到字典中.但是他们给了我上面提到的错误.这是我的代码

I want to add my data in dictionary in form of key value pair. But They give me error mentioned above. Here is my Code

let dictionary = NSDictionary(objects: [getStringAt(selectStmt, column: 0), getStringAt(selectStmt, column: 1)], forKeys: ["username", "image"])

推荐答案

错误消息提示您将创建带有可选String值的字典.

The error message says that you're going to create an dictionary with optional String values.

由于字典中的所有值都必须是非可选的，因此必须解开它们.

Since all values in a dictionary must be non-optional you have to unwrap them.

let dictionary = NSDictionary(objects: [getStringAt(selectStmt, column: 0)!, getStringAt(selectStmt, column: 1)!], forKeys: ["username", "image"])

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