How to convert Data received from UIImagePNGRepresentation() to String and vice versa?

Question

This is how I create Data from UIImage:

let data = UIImagePNGRepresentation(image)

And then I need to convert it to String;

    if let data = data {
        let stringFromData = String(data: data, encoding: .utf8)
    }

but stringFromData is nil. Why?

use this if you want image reverse back :let image : UIImage = UIImage(data: data) — KKRocks, May 08 '17 at 13:54
I need to pass imageData when sharing some info using Branch.io for Universal Links. — Bartłomiej Semańczyk, May 08 '17 at 13:54
http://stackoverflow.com/questions/11251340/convert-between-uiimage-and-base64-string — MAhipal Singh, May 08 '17 at 13:55
@BartłomiejSemańczyk Not regarding the question but if you save your image data as png it will not save the image orientation and it is uncompressed data. The easiest solution is to use jpeg or if the size doesn't matter you can flatten your png image. http://stackoverflow.com/questions/42098390/swift-png-image-being-saved-with-incorrect-orientation/42098812#42098812 — Leo Dabus, May 08 '17 at 14:28

score 4 · Answer 1 · answered May 08 '17 at 13:55

You can get it using the Data method base64EncodedString()

if let data = data {
    let stringFromData = data.base64EncodedString()
    //  to decode base 64 string you can use Data base64Encoded String initializer
    if let dataFromBase64 = Data(base64Encoded: stringFromData) {
        print(data)
    }
}

Jignesh Mayani · Answer 2 · 2017-05-08T13:52:37.513

0

Convert Your image data in Base64 string

For Encode

let stringFromData : Data = Data(base64Encoded: strBase64, options: .ignoreUnknownCharacters)!

And decode

let strBase64 = imageData.base64EncodedStringWithOptions(.allZeros)

edited May 08 '17 at 13:52

answered May 08 '17 at 13:50

Jignesh Mayani

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how do I get `strBase64`? – Bartłomiej Semańczyk May 08 '17 at 13:51
check i have put both method – Jignesh Mayani May 08 '17 at 13:53

How to convert Data received from UIImagePNGRepresentation() to String and vice versa?

2 Answers2

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