Rotate UIBarButtonItem Swift - ios

Question

In Swift, I have a hamburger bar button, so when tapped I want that hamburger Bar button to rotate 90 degrees (so that the lines are vertical) and then when you click it again I would like it to go back to it's original state (horizontal)
NOTE: Can you make sure that this works for a UIBarButtonItem, because some solution to a normal UIButton does not work.

Answer 1

I use a UIButton inside of UIBarButtonItem to achieve this, and a variable with state vertical or not
this is my storyboard setup
Here is the code of simple view controller
import UIKit
class ViewController: UIViewController {
var isVertical : Bool = false
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBAction func rotateAction(_ sender: Any) {
if(!self.isVertical)
{
UIView.animate(withDuration: 0.2, animations: {
self.navigationItem.leftBarButtonItem?.customView?.transform = CGAffineTransform(rotationAngle: 90 * .pi / 180)
}, completion: { (finished) in
self.isVertical = true
})
}else{
UIView.animate(withDuration: 0.2, animations: {
self.navigationItem.leftBarButtonItem?.customView?.transform = CGAffineTransform.identity
}, completion: { (finished) in
self.isVertical = false
})
}
}
}
Result
Hope this helps

Answer 2

#IBAction func rotateAction1(_ sender: Any) {
if (!self.isVertical) {
UIView.animate(withDuration: 0.2, animations: {
self.navigationItem.leftBarButtonItem?.customView?.transform = CGAffineTransform(rotationAngle: 90 * .pi / 180)
}, completion: {
(finished) in
self.isVertical = true
})
revealViewController().revealToggle(true)
} else {
UIView.animate(withDuration: 0.2, animations: {
self.navigationItem.leftBarButtonItem?.customView?.transform = CGAffineTransform.identity
}, completion: {
(finished) in
self.isVertical = false
})
revealViewController().revealToggle(false)
}
}

Answer 3

Swift 4:
func rotateBarButton() {
let button = UIButton(frame: CGRect(x: 0, y: 0, width: 40, height: 40)) // Create new button & set its frame
button.setImage(#imageLiteral(resourceName: "settings"), for: UIControlState()) // Assign an image
let lef = UIBarButtonItem(customView: button)
self.navigationItem.leftBarButtonItem = lef// Set as barButton's customView
// Gets you half way there //
UIView.animate(withDuration: 0.8, delay: 0.1, options: UIViewAnimationOptions.curveEaseIn, animations: {
self.navigationItem.leftBarButtonItem?.customView?.transform = CGAffineTransform(rotationAngle: CGFloat(M_PI))
}, completion: nil)
// Rotates all the way around //
UIView.animate(withDuration: 0.5, delay: 0.5, options: UIViewAnimationOptions.curveEaseIn, animations: {
self.navigationItem.leftBarButtonItem?.customView?.transform = CGAffineTransform(rotationAngle: CGFloat(M_PI * 2))
}, completion: nil)
}