如何在 Swift 中使用相同的变量名，但使用不同的数据类型

Question

I get error when I was assigned the different value in same variable name.

This is the error: cannot assign value of type '[String]' to type 'String' and this is the code:

var data: String

data = "datas|datas"
data = data.components(separatedBy: "|") as! [String]
debugPrint(data.first!)

or, this is for image in code type:

I think, in PHP language, is more easier than Swift language. Because, in PHP language, this code is run as it should.

hope somebody help me out

Answer 1

No you can't

let other = data.components(separatedBy: "|") as! [String]

you have to set a variable to only 1 type at a time , makeing data of type any will do the job but you have to cast

Answer 2

I would suggest just use array of strings always:

var data: [String]

data = ["datas|datas"]
data = data.flatMap { $0.components(separatedBy: "|") }
debugPrint(data.first!)