Check out example codes for "swift uitableview cell spacing". It will help you in understanding the concepts better.
Code Example 1
// Inside UITableViewCell subclass
override func layoutSubviews() {
super.layoutSubviews()
contentView.frame = contentView.frame.inset(by: UIEdgeInsets(top: 8, left: 8, bottom: 8, right: 8))
}
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