Swift检查值是否为数组（任何类型） [英] Swift check if value is of type array (of any type)

问题描述

如果值是一个数组，我该如何检查Swift？问题在于 Int 类型的数组显然不能被转换为 Any 类型的数组。假设我有一个 myArray 类型的 Int 数组并执行以下操作：

 如果让array = myArray as？ [任何] {返回true} 
  

它不会返回true（实际上令我感到意外）。字典出现同样的情况。我想要一个字符串，任何（意味着 Any 可以是任何类型）的字典。我该如何检查它是否是？

预先感谢。 解决方案

 协议数组类型{} $ b我们可以像这样工作，但它并不像我希望的那样美丽： $ b扩展Array：ArrayType {} 
 
 let intArray：Any = [1，2，3] 
 let stringArray：Any = [hi，hello，world] 
 
 intArray是ArrayType // true 
 stringArray是ArrayType // true 
  

编辑：我想我之前误解了你的问题，现在我明白了：

  let intArray = [1，2 ，3] 
 
 let anyArray = intArray.map {$ 0 as Any} 
  

这是我了解的唯一途径。

How can I check in Swift if a value is an Array. The problem is that an array of type Int can apparently not be casted to an array of type Any. Suppose I have an array myArray of type Int and execute the following:

if let array = myArray as? [Any] { return true }

it doesn't return true (which surprises me actually). The same thing appears with dictionaries. I want a dictionary of type String, Any (meaning that Any can be any type). How can I check if it is?

Thanks in advance.

解决方案

Got it working like this, although it's not as beautiful as I would've hoped:

protocol ArrayType {}
extension Array : ArrayType {}

let intArray : Any = [1, 2, 3]
let stringArray : Any = ["hi", "hello", "world"]

intArray is ArrayType       // true
stringArray is ArrayType    // true

EDIT: I think I misunderstood your question before, now I got it though:

let intArray = [1, 2, 3]

let anyArray = intArray.map{ $0 as Any }

This is the only way to my knowledge.

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