On Sep 2, 2016, at 22:02 , Gerriet M. Denkmann <gerr...@mdenkmann.de> 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. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com