Create navigation item with default Icon programatically IOS - ios

Question

I want to create a navigation item "Refresh" with the default XCode refresh Icon programmatically. I know how to create one with the word "Refresh" with the following code. However, I want to have the icon insetead of the word "Refresh" Thanks for helping in advance
let refreshButton = UIBarButtonItem(title: "Refresh", style: UIBarButtonItemStyle.Plain, target: self, action: #selector(FollowVC.refresh))

Answer 1

Superb question.I tried sample one for your question.I got the solution and It works fine.
what you made mistake in your coding is
First your
let refreshButton = UIBarButtonItem(title: "Refresh", style: UIBarButtonItemStyle.Plain, target: self, action: #selector(FollowVC.refresh))
is wrong.You have to use or write
UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem, target: AnyObject?, action:Selector)
Second you used UIBarButtonItemStyle.Plain.If you want refresh button you have to set UIBarButtonSystemItem.Refresh.
SWIFT
override func viewDidLoad()
{
// Create the navigation bar
let navigationBar = UINavigationBar(frame: CGRect(origin: CGPoint(x: 0, y: 0), size: CGSize(width: self.view.frame.size.width, height: 64))) // set frame here
//set the background color
navigationBar.backgroundColor = UIColor.white
navigationBar.delegate = self as? UINavigationBarDelegate;
// Create a navigation item with a title
let navigationItem = UINavigationItem()
navigationItem.title = "title" //If you want to set a tilte set here.Whatever you want set here.
// Create button for navigation item with refresh
let refreshButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.refresh, target: self, action: Selector(("actionRefresh:")))
// I set refreshButton for the navigation item
navigationItem.leftBarButtonItem = refreshButton
// Assign the navigation item to the navigation bar
navigationBar.items = [navigationItem]
// Make the navigation bar a subview of the current view controller
self.view.addSubview(navigationBar)
}
#pragma action method
func actionRefresh(sender: UIBarButtonItem)
{
print("The action button is refreshed")
}
Print statement is
The action button is refreshed
OBJECTIVE C
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UINavigationBar *navbar = [[UINavigationBar alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 64)];
navbar.backgroundColor = [UIColor whiteColor];
navbar.delegate = self;
UINavigationItem * navItem = [[UINavigationItem alloc] init];
navItem.title = #"Title"; //Set Title Here Wahtever You Want Here
UIBarButtonItem *buttonRefresh = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh
target:self
action:#selector(actionRefresh:)];
navItem.leftBarButtonItem = buttonRefresh;
navbar.items = #[navItem];
[self.view addSubview:navbar];
}
The NSLog statement is
The button action refresh is performed
See the refresh button in screenshot
Good Solutions
Add Default Icons to Navigation Bar
Navigation Bar Item Programmatically
Adding Navigation Bar item Programmatically

Answer 2

Instead of using .Plain, you should be using .Refresh.
let refreshButton = UIBarButtonItem(barButtonSystemItem: .Refresh, target: self, action: #selector(FollowVC.refresh))
Also you should be using the init(barButtonSystemItem:target:action:) instead of the init(title:style:target:action:).