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.

Check this : https://stackoverflow.com/questions/6648518/save-images-in-nsuserdefaults — Ramesh Sanghar, Sep 18 '22 at 04:59
No need to use PNG. You can use HEIC which supports transparency as well and it is much lighter. — Leo Dabus, Sep 18 '22 at 05:17

score 2 · Accepted Answer · answered Sep 18 '22 at 18:00

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.

Reduce base64 encoded string size

1 Answers1