You should try this, with which you can set the color of the cell borders, and if you want to change the color of a specific cell border, put it in a state like: if (indexPath.row == yourcell):
tableView.separatorColor = [UIColor blackColor];
You must also put the above method in the CellForRowAtIndexPath method for the table view data source.
Please let me know if it works.
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