Add character to specific index in string - swift 3

Question

I'm trying to insert a specific character in a specific index in a string lets say

var text = "1234567890"

i want that variable to add the country code of the phone number:

text = text.replacingCharacters(in: text.startIndex..<text.index(after: text.startIndex), with: "+593\\U00a0")

Then i have to format that string into something like this: "+593 23-456-7890", so i have to insert "-" into the index 8 and 11 but i have only found answers with swift 2.0. Strings had a method called insert that doesn't exists anymore. i've tried this:

text = text.insert("-", at: text.index(text.startIndex, offsetBy: +8))

but I have the following error "Cannot assign value of type '()' to type 'String'

If my answer was helpful, I would appreciate it if you accept my answer. This will mark this question as "answered" and it will give you, as well as me, some reputation. — Sumner Evans
– Sumner Evans, Commented Jul 20, 2017 at 15:13

Sumner Evans · Accepted Answer · 2016-11-01 01:22:06Z

10

Insert operates on the actual string itself. Therefore, there is no need to assign back to it. You can just use the following:

text.insert("-", at: text.index(text.startIndex, offsetBy: +8))

More information about inserting into a string can be found in the Swift documentation from Apple.

answered Nov 1, 2016 at 1:22

Sumner Evans

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