Xcode abnormal pictures cause IPA packet size problems

APP Pack and lose weight

cause

Because of doing APP Version update , Because it doesn't add much content , But the size of the package quickly increases after packaging , From the original 39.1M become 53.1M

Check

1、 First check the third party , It is found that no large third party has been added
2、json Document and gif chart , After removing the package , The volume has not decreased
3、 When I remove the picture , The package volume is significantly reduced , from 53.1M -> 44M

reason

After a check , It was found that it was a picture , Because there is a problem with the image cut , It coincides with UI run , Subsequent manual screenshots lead to , As shown in the figure below

Although screenshot 1.1M , Compared with the original 0.2M Not much , But packaged ipa The volumes are
53.1 M and 46.8M, Increasing the 6.5M

The main reason is because of the screenshot 、 Or other tools （ For a little longer , The specific treatment method has been forgotten ）, Caused the picture type to change , It is recommended that UI Cutaway
I made a rough estimate of , No picture packed ,ipa The volume of the package shall be increased by at least two times

solve

Because there is a problem with the cut , But the code is adapted to the problem image , Avoid the excessive increase of package volume

Suggest

1、 Use as much as possible UI Cutaway , Don't use screenshots or non professional screenshot tools , It's best to find a cut tool to deal with
2、 Big picture influence ipa package , It is suggested that the picture should not exceed 100kb, exceed 50kb Also put less

Image resources and resource compression package

Screenshot ：2x and 3x

Blue lake cut file 2x and 3x

Picture compressed file link

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