Transparent/translucent navigation bar with button items in Swift

Question

I'm trying to get an almost transparent navigation bar. But I don't want the buttons on it to be transparent.

This is my code:

navigationController?.navigationBar.backgroundColor = UIColor.blackColor()
navigationController?.navigationBar.barTintColor = UIColor.blackColor()
navigationController?.navigationBar.translucent = true
navigationController?.navigationBar.alpha = 0.3

This does make it translucent but it also makes the buttons translucent/faded. How can I have a translucent bar but still have the buttons opaque?

Answer 1

尝试这个：

navigationController?.navigationBar.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.3)

Answer 2

navigationController?.navigationBar.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.3) 
navigationController?.navigationBar.barTintColor = UIColor.blackColor() 
navigationController?.navigationBar.translucent = true