On Sep 2, 2016, at 22:02 , Gerriet M. Denkmann <[email protected]> wrote:
>
> Did in a playground:
>
> let s = String(format: "%2s → %2s", "a", "b")
> print(“formatted = \"\(s)\"")
>
> But this prints random garbage (e.g.: formatted = “‡“S → ‡“S”) (no error
> message or compiler warning).
>
> Why?
Because %s is the specifier for a C-string, and "a", "b" are Swift strings.
> How to create a formatted string?
Use the %@ specifier as you would for NSString, or use a string interpolation
expression:
let s = “\(a) → \(b)”
If you absolutely must use %2s, the following works too (in a playground):
let s = String(format: "%2s → %2s", ("a" as NSString).utf8String!, ("b"
as NSString).utf8String!)
but that’s a lot of ugly.
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