Swift nil可选字符串=空字符串

Question

This one does not make sense to me at all. I have a struct that takes a few strings:

public struct Organization {
  let id: String
  let name: String
  let legacyID: String?
  let rID: String?

  public init(id: String, name: String, legacyID: String?, rID: String?) {
    self.id = id
    self.name = name
    self.legacyID = legacyID
    self.rID = rID
  }
}

Notice that legacyID and rID are optional. However, if I attempt to set either of them to nil or .None , instead they get set to "" (empty string). Ex:

let org = Organization(id: company.companyID, name: company.name, legacyID: company.context, rID: nil)

And yet, when I attempt to access rID , it shows up as "" instead of nil . I've even tried directly setting nil in the init and it's still set as "" . This is messing up my equality checks. Anyone know what is going on?

Note: This is Swift 1.2

Answer 1

You getting "" as output because your data type is String. So if any String variable is empty or nil it always shows "". You can't get nil as output by using String type. Even if you assign nil directly nothing happen same output will come.

Edited : This is what i got from ur code. Its working properly.

Answer 2

So it turns out the problem was the debugger. If I used the debugger to check the value, even in the debugger prompt, p/po/print org.rID it returned the incorrect value. However, inserting a println(org.rID) in my code printed the correct value nil . I hate it when I can't trust the debugger. Happened when they switched from gcd to lldb too. Hopefully this is straightened out in Xcode 7.