Why they have 1 pixel between 2 objects. (Affinity designer)

[pangloy]

Hello. 🙏
Why they have 1 pixel between 2 objects. (Affinity designer)

Same as when I use DIVIDE, they have 1 pixel between 2 objects too

Thank you so much. 🙏

[pangloy]

It has 1 pixel between objects 🙏

[ashf]

Short answer: just ignore it.

This is artifacts caused by antialiasing and common thing in many vector software but not only Affinity.
Export the artwork to PNG or PDF. you won't see the gap if you created the artwork properly.
It's only on the editing screen.

[ashf]

11 minutes ago, anto said:

How to know when ignore it? In my case white line is in PDF.

 

As I mentioned, you will see the gap on the editing screen of Affinity.
But you won't see the gap in Acrobat Reader.
I opened Untitled.pdf you uploaded in Acrobat, there's no gap.

[ashf]

1 minute ago, anto said:

Open Untitled5.pdf

That's because you created the object as an image(raster format).
If you want to export an artwork in raster format:
1. use pixel unit
2. objects should not have sub-pixel(decimal point) size/position.
3. align objects to pixel grid.

[ashf]

See the attached pictures.
Also I amended your file as sample.

Untitled-pixel.afdesign