Question

我在Appdelegate的didFinishLaunchingWithOptions方法中有一些代码，根据代码显示不同的ViewController。添加此代码动画后不显示方向将更改。但如果我删除此代码然后动画显示有人解释我如何解决这个问题？这是代码。

       self.window = UIWindow(frame: UIScreen.main.bounds)
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    var vc:UIViewController

    if (UserDefaults.standard.object(forKey: "Person") as? Bool) == nil {

        vc = storyboard.instantiateViewController(withIdentifier: "FirstNavigationView")

    }else{

        vc = storyboard.instantiateViewController(withIdentifier: "MainView")

    }

    self.window?.rootViewController = vc
    self.window?.makeKeyAndVisible()

Answer 1

在视图控制器中添加以下代码并尝试

override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
    coordinator.animate(alongsideTransition: nil, completion: {
        _ in
        UIView.setAnimationsEnabled(true)
    })
    UIView.setAnimationsEnabled(true)
    super.viewWillTransition(to: size, with: coordinator)
}

Orienatation动画没有显示方向何时会改变ios Swift

1 个答案: