'advancedBy' is unavailable in Xcode 8

Question

Currently, I've been using XCode 8 and on the line

let range = key.startIndex...key.startIndex.advancedBy(0)

I get the error:

error: 'advancedBy' is unavailable: To advance an index by n steps call 'index(_:offsetBy:)' on the CharacterView instance that produced the index.

How can I fix this?

A screenshot of the error is below:

Please include your code in the question as well as the screenshot. — Paulw11, Jul 19 '16 at 04:09
You need to use index offsetBy http://stackoverflow.com/a/38215613/2303865 — Leo Dabus, Jul 19 '16 at 04:11
See https://github.com/apple/swift-evolution/blob/master/proposals/0065-collections-move-indices.md — HAS, Sep 03 '16 at 06:33

score 23 · Answer 1 · edited Jun 03 '17 at 03:40

23

advancedBy(_:) has been deprecated in Swift v3 and replaced by index(_:offsetBy:). Refer to Apple's migration guide for more info.

The solution to your error:

let range = key.startIndex...key.index(key.startIndex, offsetBy: 0)

edited Jun 03 '17 at 03:40

Anjan Biswas

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answered Sep 03 '16 at 05:27

yohannes

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score 0 · Answer 2 · answered Jul 19 '16 at 06:33

You can achieve what you are after more simply by building a new string rather than manipulating the old one:

let upperCasedFirstCharacter = String(key.characters.first!).uppercased()

let remainder = key.substring(from: key.characters.index(after: key.characters.startIndex))

let selector = "set\(upperCasedFirstCharacter)\(remainder)"

'advancedBy' is unavailable in Xcode 8

2 Answers2

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