Why Apps icon disappear after update iOS 7. [duplicate] - ios

This question already has answers here:
How do you update the app icons and launch images to support IOS 6 and 7 simultaneously?
(6 answers)
Closed 9 years ago.
I match a strange problem,when device update iOS 7, my Apps icon disappear and iOS 6 is ok.
Anything setting error? or miss piex image ?
Thanks advance!

For IOS 7 you need to add a new icons.
Add new images in the size of 76x76 , 120 x 120 and 152x 152
Refer this

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This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
How to deal with iPhone 5 screen size?
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