How can I convert a string to Unicode in swift?

Question

I need convert String to Unicode,like this: let str = "哈哈123abc" Because I send data is limited, so I need the most saving way，what should i do

What String representation are you starting with? What is the String representation that you want to convert to? Take a look at the Strings and Characters documentation and see if it helps to improve your question. — user887210
– user887210, Commented Oct 19, 2016 at 11:25
I am used to BLE peripheral. The name, will be limited to 18 byte, including Chinese characters, Numbers and characters, Chinese characters 3 byte, because unicode is a 2 byte, so need to string converted to unicode — sumberWang
– sumberWang, Commented Oct 19, 2016 at 11:31
What encoding does the Chinese characters have? Do you want to end up with UTF-8? — user887210
– user887210, Commented Oct 19, 2016 at 11:42

Pramod Tapaniya · Accepted Answer · 2017-01-20 09:14:39Z

19

This way you can convert String to Unicode in swift3

var str : String = "哈哈123abc"

//String to Unicode
var dataenc = str.data(using: String.Encoding.nonLossyASCII)
var encodevalue = String(data: dataenc!, encoding: String.Encoding.utf8)

//Unicode to String
var datadec  = encodevalue?.data(using: String.Encoding.utf8)
var decodevalue = String(data: datadec!, encoding: String.Encoding.nonLossyASCII)

edited Jan 20, 2017 at 9:14

Pramod Tapaniya

1,26612 silver badges32 bronze badges

answered Oct 19, 2016 at 13:22

Chirag Desai

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3 Comments

sumberWang Over a year ago

oh,thanks,but,how convert Unicode to String in swift3?

Ishika Over a year ago

How do we do this for attributed string?

Vignesh Over a year ago

encode value gives two slash and it's not working, please check your answer again

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