It is very difficult to say without seeing your code in cellForRowAtIndexPath and not seeing your cells and their corresponding code. Here are some common questions that I would investigate:
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, , ,
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, (UIImage imageNamed:), , , . , .
cellForRowAtIndexPath?
, cellForRowAtIndexPath, ?
cellForRowAtIndexPath?
, , , xib, .., . , . , - cellForRowAtIndexPath, initWith... awakeFromNib (.. , , , , )
, ,