如何在leftBarButtonItem上更改pushViewController上的动画方向

Question

我已经向NavigationBar添加了一个leftBarButtonItem(与NavigationController一起(。leftBarButtonItem位于ViewController的顶部。

当我使用pushViewController函数转到下一个ViewController时，动画是从右到左的，与按下导航栏右侧的按钮时相同。

如何将动画方向更改为从左向右，例如在Tinder中按下导航栏上的左按钮时？

这是代码：

let profileButton = UIBarButtonItem(image: #imageLiteral(resourceName: "profile"), style: .plain, target: self, action: #selector(self.showProfile))
self.navigationItem.leftBarButtonItem = profileButton
@objc func showProfile() {
let profileViewController = storyboard?.instantiateViewController(withIdentifier: "profile") as! ProfileViewController
self.navigationController?.pushViewController(profileViewController, animated: true)
}

Answer 1

要在推送到另一个viewController时设置动画，可以使用CATransition

@objc func showProfile() {
let profileViewController = storyboard?.instantiateViewController(withIdentifier: "profile") as! ProfileViewController
let transition = CATransition()
transition.duration = 0.5
transition.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
transition.type = CATransitionType.push
transition.subtype = CATransitionSubtype.fromLeft       
navigationController?.view.layer.add(transition, forKey: kCATransition)
self.navigationController?.pushViewController(profileViewController, animated: true)
}

您可以将动画方向更改为fromRight，fromTopfromBottom

Answer 2

您不能更改UINavigationController的方向。为了实现这一点，你必须自己创造它。如果您想实现菜单，可以查看SideMenu。