PS for help!

This is very simple. I'll tell you how to do it myself

Draw a path with rounded corners, and select 19 as rounded corners according to the size of the icon.

Copy add path to each icon.

Convert the path into a selection;

Ctrl+j, the corner icons are all out, very clean.

The quick selection tool selects the weather icon CTRL+J at the top.

At this point, all the icons have been pulled out.

On the icon layer of transparent background, file-automatically-cuts and trims photos, and each icon becomes an independent file.

If you want to concentrate all these files in one PSD file, you can drag them in one by one, or you can choose a single icon path to change the selection and then ctrl+j, and repeat them one by one.

Note that the rectangular path of the corner must be slightly smaller than the icon to ensure that the blue background is clean. I just did it again, and the effect is very good. Forgot to save it.