我有一个 TableView ,并在单元格内设置约束...我收到一个我不理解的约束错误。这是控制台打印:
2019-07-08 01:10:56.377538-0400 TableCellDynamicHeight[5827:393085] [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.
(
"<_UILayoutSupportConstraint:0x2835000a0 _UILayoutGuide:0x135e164f0.height == 20 (active)>",
"<_UILayoutSupportConstraint:0x283500000 V:|-(0)-[_UILayoutGuide:0x135e164f0] (active, names: '|':UIView:0x135e16310 )>",
"<NSLayoutConstraint:0x283517e80 V:[_UILayoutGuide:0x135e164f0]-(0)-[UITableView:0x13682e800] (active)>",
"<NSLayoutConstraint:0x2835001e0 V:|-(0)-[UITableView:0x13682e800] (active, names: '|':UIView:0x135e16310 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x283517e80 V:[_UILayoutGuide:0x135e164f0]-(0)-[UITableView:0x13682e800] (active)>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.
这就是我的 viewController 和约束的样子:
最佳答案
它基本上告诉您您的约束有冲突,它必须自动删除其中的一个。
假设您有一个高度为 40 的 View 。然后你在里面放一个 View ,并告诉它距离顶部 10,高度 20,距离底部 0。这将导致它告诉您 1 个约束是错误的,必须删除才能工作。因为您命令它的高度为 30,而实际高度为 40。
另一件事是,如果在上述情况下您实际上有 10 个底部。这也会造成冲突,因为 View 已经知道它是 10 到底部,这意味着你基本上告诉编译器它的 10 到底部两次
关于ios - 这个控制台警告对我的约束意味着什么?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56928887/