UITableViewAlertForLayoutOutsideViewHierarchy错误:仅警告一次(iOS 13 GM)

问题描述

在执行Segue时，iOS13出现了一个奇怪的错误，我无法弄清这是什么意思，也找不到针对此错误的任何文档.问题在于，这似乎会导致很多延迟(几秒钟)，直到执行segue为止.

I am getting a strange error with iOS13 when performing a Segue and I can't figure out what it means, nor can I find any documentation for this error. The problem is that this seems to cause a lot of lag (a few seconds) until the segue is performed.

我正在使用Hero，但是我尝试禁用它并使用常规的Segue，但这并没有阻止这种滞后.

I am using Hero but I tried disabling it and using a regular Segue and this hasn't stopped the lag.

启动segue的代码是didSelectRowAt

The code to initiate the segue is didSelectRowAt

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        if indexPath.section == 0 {
            selectedCell = realIndexFor(activeGoalAt: indexPath)
            performSegue(withIdentifier: "toGoalDetails", sender: nil)
        } else if indexPath.section == 1 {
            selectedCell = indexPath.row
            performSegue(withIdentifier: "toIdeaDetails", sender: nil)
        } else {
            selectedDecision = indexPath.row
            hero(destination: "DecisionDetails", type: .zoom)
        }
    }

然后来自目标VC的viewDidLoad或viewWillAppear中的任何代码都不会以任何方式影响这一点(我尝试将它们全部注释掉，没有任何区别.

And then none of the code in viewDidLoad or viewWillAppear from the destination VC affects this in any way (I tried commenting it all out with no difference.

知道这是什么原因吗?我可以分享任何其他需要的细节.

Any idea what's causing this? I can share whatever other details are needed.

谢谢.

推荐答案

发生在我身上是因为我在viewWillAppear( :)方法中注册了用于更改方向通知的设备.我将注册移到了viewDidAppear( :)中，并且Xcode不再在断点处停止.

It happened to me because I registered the device for change orientation notification in the viewWillAppear(:) method.I moved the registration in the viewDidAppear(:) and Xcode it's not stopping at the breakpoint anymore.

我可以说的是，当视图已经可见时，布局更改可能会运行...

What I can say is that layout changes might be run when the view is already visible...

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