Swift Bar Button Item 60 Spin？(Swift Bar Button Item 60 Spin?)

Swift Bar Button Item 60 Spin？(Swift Bar Button Item 60 Spin?)

我之前在这里看到过类似的问题，但它们只涉及简单的按钮，而不是条形按钮项。 请记住，栏按钮项和常规按钮具有不同的属性，因此其他帖子的答案在这种情况下不起作用。

有一种方法，在swift中，我可以使我的刷新条按钮项目旋转一次60度（以显示发生了一个动作）？

I have seen similar questi on here before, but they relate to just simple butt, not bar button items. Keep in mind- bar button items and regular butt have different properties, thus the answers on the other posts will not work in this situation.

Is there a way, in swift, that I can make my refresh bar button item spin 60 degrees one time (to show that an action occurred)?

最满意答案

为了动画化UIBarButtonItem ，我们需要为它分配一个customView并为其设置动画。

我在下面做的是创建一个普通的UIButton ，并将它的图像分配给名为“refresh”的刷新图标。 接下来，我将我的UIBarButtonItem的customView设置为我的新按钮。 现在barButton有一个customView ，我可以调用我的rotateBarButton()方法来执行动画代码。

import UIKit class ViewController: UIViewController { @IBOutlet weak var barButton: UIBarButtonItem! override func viewDidLoad() { super.viewDidLoad() let button = UIButton(frame: CGRectMake(0, 0, 40, 40)) // Create new button & set its frame button.setImage(UIImage(named: "refresh"), forState: .ormal) // Assign an image = button // Set as barButton's customView } func rotateBarButton() { // Gets you half way there // UIView.animateWithDuration(0.05, delay: 0.0, opti: UIViewAnimationOpti.CurveEaseIn, animati: { self.?.transform = CGAffineTransformMakeRotation(CGFloat(M_PI)) }, completion: nil) // Rotates all the way around // UIView.animateWithDuration(0.5, delay: 0.5, opti: UIViewAnimationOpti.CurveEaseIn, animati: { self.?.transform = CGAffineTransformMakeRotation(CGFloat(M_PI * 2)) }, completion: nil) } }

In order to animate a UIBarButtonItem, we need to assign it a customView and animate that instead.

What I've done below is create an ordinary UIButton, and I've assigned it's image to a refresh icon named "refresh". ext, I set my UIBarButtonItem's customView to be my new button. ow that barButton has a customView, I can call my rotateBarButton() method to perform the animation code.

import UIKit class ViewController: UIViewController { @IBOutlet weak var barButton: UIBarButtonItem! override func viewDidLoad() { super.viewDidLoad() let button = UIButton(frame: CGRectMake(0, 0, 40, 40)) // Create new button & set its frame button.setImage(UIImage(named: "refresh"), forState: .ormal) // Assign an image = button // Set as barButton's customView } func rotateBarButton() { // Gets you half way there // UIView.animateWithDuration(0.05, delay: 0.0, opti: UIViewAnimationOpti.CurveEaseIn, animati: { self.?.transform = CGAffineTransformMakeRotation(CGFloat(M_PI)) }, completion: nil) // Rotates all the way around // UIView.animateWithDuration(0.5, delay: 0.5, opti: UIViewAnimationOpti.CurveEaseIn, animati: { self.?.transform = CGAffineTransformMakeRotation(CGFloat(M_PI * 2)) }, completion: nil) } }