在iPhone X上停用时触发applicationDidBecomeActive [英] applicationDidBecomeActive firing on deactivation on iPhone X

问题描述

是否有其他人遇到applicationDidBecomeActive在新iPhone X上应用程序的停用时错误地触发?

Is anyone else having trouble with applicationDidBecomeActive incorrectly firing on deactivation of the app on the new iPhone X?

这是我的测试应用程序:

Here's my test app:

class ViewController: UIViewController {

    required init?(coder aDecoder: NSCoder) {
        super.init(coder:aDecoder)
        NotificationCenter.default.addObserver(
            self,
            selector: #selector(fired),
            name: .UIApplicationDidBecomeActive,
            object: nil
        )
    }

    @objc func fired(_:Any) {
        print("fired")
    }

}

在iPhone X模拟器上运行该应用程序.自然，我在控制台中看到被解雇".到目前为止，一切都很好.现在从侧面或向上滑动主页指示器，以切换到其他应用程序或调出应用程序切换器.我看到解雇"再次出现在控制台中！

Run the app on the iPhone X simulator. Naturally, I see "fired" in the console. So far, so good. Now swipe the home indicator sideways or up, to switch to a different app or to bring up the app switcher. I see "fired" appear again in the console!

这似乎是错误的，并且将我所有的应用都丢进了混乱之中.我该如何应对停用时收到激活通知?

This seems just wrong, and is throwing all of my apps into a kerfuffle. How can I cope with getting an activation notification on deactivation?

推荐答案

实际上，当在iPhone X Simulator中停用该应用程序时，会迅速连续触发三个通知:

In fact there are three notifications fired in rapid succession when the application is deactivated in the iPhone X Simulator:

1. UIApplicationWillResignActive
2. UIApplicationDidBecomeActive
3. UIApplicationWillResignActive

这是错误的(您可能要提交错误报告)，但是如果用户使用，这是可能发生的事情 停用-激活-快速停用应用程序，因此该应用程序 无论如何应该应对这种情况.

This is wrong (and you might want to file a bug report), but it is something that could happen if a user deactivates - activates – deactivates the app quickly, so the app should cope with that situation anyway.

两个通知都必须以对称的方式进行处理(即使存在该错误，它们也要保持适当的平衡):完成的操作 在激活"状态下，必须反转为停用"状态.

Both notifications must be handled in a symmetric fashion (and they come properly balanced, even with that bug): Actions done on "activate" must be reversed on "deactivate".

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