Explain the differences between layoutSubviews, layoutIfNeeded, and setNeedsLayout methods in the process of automatic layout and interface update.

• setNeedsLayout — informs the system that the current view needs a layout update. Calling this method requests an update, but the update will occur later, in the next rendering cycle.

• layoutIfNeeded — forces an immediate layout update if there is a pending layout request. If setNeedsLayout was called earlier, calling layoutIfNeeded will apply the changes immediately.

• layoutSubviews — is a method overridden in a UIView subclass to define how its subviews should be laid out. It is called automatically by the system during layout updates, or can be called manually.

Example usage:

view.setNeedsLayout() // Mark that layout needs to be updated
view.layoutIfNeeded() // Immediately update layout if needed

// Overriding layoutSubviews
override func layoutSubviews() {
    super.layoutSubviews()
    // Layout of subviews
}