Generate a UUID on iOS from Swift

2018-07-02 19:39:51

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?

Try this one:

let uuid = NSUUID().UUIDString
print(uuid)

Swift 3

let uuid = UUID().uuidString
print(uuid)

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.

对于Swift 3，许多Foundation类型已经放弃了'NS'前缀，因此您可以通过UUID().uuidString访问它。

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