<Error>: ImageIO: PNG invalid PNG file: extra chunks between iDOT and IDAT

Question

Just got this funny looking error in my swift project debugger.

There is probably an invalid name of an image somewhere, but I am not sure what extra chunks between iDOT and IDAT mean.

Do you have any idea what causes it?

Answer 1

Product > Clean Build Folder (with pressed Option) fixed it for me

Keyboard shortcut - Shift+Option+Command+K

Answer 2

This issue is completely random and happened to me too with a few images. Probably another Xcode bug.

1. My image is called "[email protected]"
2. I renamed it to "back2.png"
3. Ran the project (the image will appear stretched)
4. Changed it back to "[email protected]"
5. Ran project
6. FIXED?!

Good-luck hope it helps!

Answer 3

In XCode 8, I cleaned the project (Product->Clean). Then quit XCode. Open it again. Then it works. I haven't changed name of the image. I guess it is just because XCode has some problem. Nothing is wrong with your code.