Can anyone advise me on how I can create a border around photos (like what you see in the screen shot below)? It seems like there is a thin grey border and a drop shadow at the back.
Appreciate any advise here.

Simple way: wrap the photo into a UIImageView, setup the borderColor, cornerRadius, shadowColor, shadowOffset, shadowPath etc. for the layer of the UIImageView.
Complex way: subclass the UIView and draw the border and shadow by yourself in -drawRect:.
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