Reduce base64 encoded string size

Question

I am using the following method to save the PNG image to UserDefaults:

func convertImageToBase64String (img: UIImage) -> String { return img.pngData()?.base64EncodedString() ?? "" }

The issues are that this data is using significantly Documents & Data storage:

And for some reason even if this data is removed from UserDefaults, this amount do not change.

I would like to fix this issues, but need to use PNG images as transparent background is important.

No need to use PNG. You can use HEIC which supports transparency as well and it is much lighter. — Leo Dabus
– Leo Dabus, Commented Sep 18, 2022 at 5:17

Didami · Accepted Answer · 2022-09-18 18:00:52Z

After some research, I found out PNG files were not using significant storage. The issue was that original images were being stored in temporary data. I managed to fix this issue following this suggestion: https://stackoverflow.com/a/37043842/14880207

I followed Ramesh Sanghar suggestion as well and stored images in the way he suggested.

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