In the Navigation Controller bar at the top of the screen we can display a title and bar buttons on the right. Apple has a number of predefined bar buttons we can use directly in Xcode to save time, instead of creating our owns.
Below screenshot shows a list of predefined bar buttons in Xcode 7.1. Each item would have a corresponding icon or text label.
Tip: If you leave the Title field empty, the labels of predefined buttons would be automatically translated to the device’s language.