ios – 旋转UIBarButtonItem Swift

在 Swift中,我有一个汉堡棒按钮,所以当点击时我想要汉堡棒按钮旋转90度(使线条垂直)然后当你再次点击它时我希望它回到原来的状态(水平)

注意：您能否确保这适用于UIBarButtonItem,因为对普通UIButton的某些解决方案不起作用.

我在UIBarButtonItem中使用UIButton来实现这一点,并使用状态为vertical的变量

这是我的故事板设置

这是简单视图控制器的代码

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
            })
        }

    }


}

结果

希望这可以帮助