如何正确删除SFSafariViewController作为子视图控制器? [英] How to remove SFSafariViewController as a child view controller correctly?

问题描述

我正在使用此SO答案提供的技术，将某些URL预先加载到SFSafariViewController中，如下所示:

I am using the technique provided by this SO answer to preload some URL in SFSafariViewController like this:

addChildViewController(svc)
svc.didMoveToParentViewController(self)
view.addSubview(svc.view)

然后我尝试使用以下代码删除Safari View控制器:

And I try to remove the Safari View controller with following code:

svc.willMoveToParentViewController(nil)
svc.view.removeFromSuperview()
svc.removeFromParentViewController()

现在，我可以预加载URL并显示Safari View，而不会出现问题.但是，当我重复几次该过程(预加载/显示/删除)(大约30次以上)后，由于某些内存问题，该应用将崩溃，因为当应用崩溃时日志显示Memory level is not normal or this app was killed by jetsam.

Now I can preload the URL and show the Safari View without problem. However, after I repeat the process (preload/show/remove) several times (probably 30+ times) , the app will crash due to some memory issue because the log shows Memory level is not normal or this app was killed by jetsam when the app crashes.

在崩溃之前，我看到了一些有关可能的泄漏警告的日志:

Before crash, I saw some logs about possible-leak warnings:

<Warning>: notify name "UIKeyboardSpringBoardKeyboardShow" has been registered 20 times - this may be a leak

<Warning>: notify name "com.apple.SafariViewService-com.apple.uikit.viewService.connectionRequest" has been registered 20 times - this may be a leak

在删除Safari View控制器时我可以正确执行吗?我想念什么吗?或有任何解决此问题的建议?

Am I doing it correctly when removing the Safari View controller? Am I missing something? Or any suggestion to work around this issue?

推荐答案

您可能正在泄漏svc.删除后将其清除.

you are probably leaking svc. nil it out after removing it.

svc.willMoveToParentViewController(nil)
svc.view.removeFromSuperview()
svc.removeFromParentViewController()
svc = nil

如果这不能解决问题，请尝试启用僵尸或使用泄漏工具

if this doesn't solve it, try enabling zombies or use the leaks instrument

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