什么是“UIView-Encapsulated-Layout-Width"约束? [英] What is a 'UIView-Encapsulated-Layout-Width' constraint?

问题描述

我不断收到无法同时满足约束"异常(Xcode 5、iOS 7、设备和模拟器)，其中列表中的约束之一是这样的:

I keep getting 'Unable to simultaneously satisfy constraints' exceptions (Xcode 5, iOS 7, both device and simulator), where one of the constraints in the list is something like this:

"<NSLayoutConstraint:0x165b23d0 'UIView-Encapsulated-Layout-Width'
H:[StoryPlayerCell:0x165affc0(0)]>"

我自己没有设置这个约束.它也不是 NSAutoresizingMaskLayoutConstraint.但它来自哪里?我怎样才能摆脱它?

I did not set this constraint myself. It's also not an NSAutoresizingMaskLayoutConstraint. But where does it come from? And how can I get rid of it?

我不知道.而且我在 Apple 的文档中找不到任何关于 'UIView-Encapsulated-Layout-Width' 的信息.甚至 Google 搜索也没有返回任何内容.

I have no idea. And I can't find anything about 'UIView-Encapsulated-Layout-Width' in the Apple's documentation. Even the Google search returns nothing at all.

有什么建议吗?

PS:我在 UICollectionView 中使用此单元格，并带有 UICollectionViewFlowLayout 的自定义子类.也许 'Encapsulated-Layout' 部分与此有关?

PS: I'm using this cell in a UICollectionView with a custom subclass of UICollectionViewFlowLayout. Maybe the 'Encapsulated-Layout' part has something to do with this?

推荐答案

一个快速而好的解决方法，是将 999 优先级值分配给具有高优先级的自定义约束.封装的 &自动生成的约束应该比您的约束具有更高的优先级.

A quick and nice fix, is to assign 999 priority value to the custom constraints with high priority. The encapsulated & auto-generated constraints should dominate with higher priority than your constraints.

https://stackoverflow.com/a/25795758/590010

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