iOS 10:NSInvalidLayoutConstraintException:约束不适当地关联了不兼容类型的锚点 [英] iOS 10: NSInvalidLayoutConstraintException: Constraint improperly relates anchors of incompatible types

问题描述

更新到iOS 10后，我的一个应用中出现了很多错误

After updating to iOS 10 Im getting this error a bunch on one of my apps

NSInvalidLayoutConstraintException:约束关系不正确不兼容类型的锚点:

NSInvalidLayoutConstraintException: Constraint improperly relates anchors of incompatible types:

<NSLayoutConstraint:0x170495270 UIView:0x1010e1d90.top == AppName.OtherView:0x1010dc6f0.centerX (active)>

我以前从来没有遇到过使用这样的约束的问题，我只能在我的iOS 10设备上使用它.有什么想法吗?

I've never had an issue using a constraint like this before and I'm only getting it on my iOS 10 devices. Any ideas?

推荐答案

您可能正在执行以下操作:

You perhaps are doing something like this:

NSLayoutConstraint(item: viewA, attribute:
                .leading , relatedBy: .equal, toItem: parentView, attribute: .top, multiplier: 1.0, constant: 20)

因此，请勿将正确的锚点缝合在一起，例如 .leading 和 .top .在这种情况下，它必须是 .leading 和.Leading .

So you do not stitch the correct anchors together like .leading and .top. In this case it must be .leading and .leading.

有趣的是，这不是iOS9的问题.

Interestingly this wasn't a problem with iOS9.

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