iOS tab bar did select in second time image goes to smaller in tab Bar controller

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Solution:

 If you are setted the insets in storyBoard you want to set in both sides.Like if you set the inset in bottom 2 then set the top to -2 (or) if you set the left to 2 then set right to -2.

It will solve your problem.Also check that if you set the image in didselect then it might be the problem.So check carefully to set the different image when select the tab bar.

Also check the constraints.

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