xcode - How to add a background image -

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i have image view on storyboard, , when trying use background. no matter do, stays on top. how change background image, don't care weather programmatically through swift or through way.

by moving of item up/down can set layer state. first 1 on second appear on first 1 then.... last 1 appear on top most.

i hope you.

by moving of item up/down can set layer state


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