iOSSwiftPrepareSegue.swift

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    guard let row = self.tableView.indexPathForSelectedRow?.row,
        let identifier = segue.identifier else { return }
    
    switch (identifier, segue.destinationViewController) {
        case (SPPostDetailViewController.segueIdentifier, let controller as SPPostDetailViewController):
            controller.model = models[row]
        default: return
    }
}