Generate a UUID on iOS from Swift

Question

In my iOS Swift app I want to generate random UUID  GUID  strings for use as a table key  and this snippet appears to work   let uuid   CFUUIDCreateString nil  CFUUIDCreate nil     Is this safe    Or is there perhaps a better  recommended  approach

User · Answer

For Swift 4   let uuid   NSUUID   uuidString lowercased

User · Answer

Try this one   let uuid   NSUUID   uuidString print uuid    Swift 3 4 5  let uuid   UUID   uuidString print uuid

User · Answer

You could also just use the NSUUID API   let uuid   NSUUID     If you want to get the string value back out  you can use uuid UUIDString   Note that NSUUID is available from iOS 6 and up

User · Answer

Each time the same will be generated   if let uuid   UIDevice current identifierForVendor  uuidString       print uuid      Each time a new one will be generated   let uuid   UUID   uuidString print uuid

User · Answer

For Swift 3  many Foundation types have dropped the  NS  prefix  so you d access it by UUID   uuidString

User · Answer

Also you can use it lowercase under below  let uuid   NSUUID   UUIDString lowercaseString print uuid    Output     68b696d7-320b-4402-a412-d9cee10fc6a3   Thank you

[ios] Generate a UUID on iOS from Swift

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