简单的 UIContextMenuConfiguration 导致无法同时满足约束答案

【问题标题】：Simple UIContextMenuConfiguration causes Unable to simultaneously satisfy constraints简单的 UIContextMenuConfiguration 导致无法同时满足约束
【发布时间】：2020-07-16 22:01:40
【问题描述】：

我创建了一个简单的 ContextMenu

override func collectionView(_ collectionView: UICollectionView, contextMenuConfigurationForItemAt indexPath: IndexPath, point: CGPoint) -> UIContextMenuConfiguration? {
        let configuration = UIContextMenuConfiguration(identifier: nil, previewProvider: nil){ action in
            let delete = UIAction(title: "Delete", image: UIImage(systemName: "trash.fill"), identifier: nil,discoverabilityTitle: nil, attributes: .destructive, handler: {action in
                self.deleteItem(index: indexPath.item)
            })
            
            return UIMenu(title: "", image: nil, identifier: nil, children: [delete])
        }
        
        return configuration
    }

它会在控制台中引发以下警告。

2020-07-16 22:58:16.227394+0200 RunPersonalRecord[8410:2186970] [LayoutConstraints] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want. 
Try this: 
    (1) look at each constraint and try to figure out which you don't expect; 
    (2) find the code that added the unwanted constraint or constraints and fix it. 
(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
"<NSAutoresizingMaskLayoutConstraint:0x280eec230 h=--& v=--& UIInterfaceActionGroupView:0x1658ca700.height == 0   (active)>",
"<NSLayoutConstraint:0x280ed7e80 groupView.actionsSequence....height >= 44   (active, names: groupView.actionsSequence...:0x158340200 )>",
"<NSLayoutConstraint:0x280ed4a00 UIInterfaceActionGroupView:0x1658ca700.top == _UIContentConstraintsLayoutGuide:0x157d4dae0''.top   (active)>",
"<NSLayoutConstraint:0x280ed4140 V:[_UIContentConstraintsLayoutGuide:0x157d4dae0'']-(0)-|   (active, names: '|':UIInterfaceActionGroupView:0x1658ca700 )>",
"<NSLayoutConstraint:0x280ed6710 groupView.actionsSequence....top == _UIContentConstraintsLayoutGuide:0x157d4dae0''.top   (active, names: groupView.actionsSequence...:0x158340200 )>",
"<NSLayoutConstraint:0x280ed6760 groupView.actionsSequence....bottom == _UIContentConstraintsLayoutGuide:0x157d4dae0''.bottom   (active, names: groupView.actionsSequence...:0x158340200 )>") Will attempt to recover by breaking constraint <NSLayoutConstraint:0x280ed7e80 groupView.actionsSequence....height >= 44   (active, names: groupView.actionsSequence...:0x158340200 )>

这可能是苹果的错误还是有可能以某种方式修复？谢谢！

【问题讨论】：

您能否分享您将UIMenu 附加到主视图的代码部分？
这段代码不太可能是您的问题。检查您的groupView 约束
我在 contextMenuConfigurationForItemAt 中创建了 ContextMenu
在 GitHub 上找到了 2 个具有相同功能的项目，并且都导致了我描述的问题。看起来像苹果虫。

标签： ios swift xcode uikit ios13

【解决方案1】：

根据苹果论坛，这是一个系统错误。现在我们应该忽略这些警告。对最终用户没有影响。 https://developer.apple.com/forums/thread/654647?page=1#621883022

【讨论】：