ios - Project确实还没有像样的约束，为什么每次都给我这个约束警告？

Question

每次我运行我的项目时，我都会在控制台中收到此警告:

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) ( "<_UIScrollViewAutomaticContentSizeConstraint:0x8cc6830 UITableView:0xb3f5c00.contentHeight{id: 112} == -7.000000>" )

Will attempt to recover by breaking constraint <_UIScrollViewAutomaticContentSizeConstraint:0x8cc6830 UITableView:0xb3f5c00.contentHeight{id: 112} == -7.000000>

Break on objc_exception_throw to catch this in the debugger. The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in may also be helpful.

它来自 UITableView，我绝对没有直接接触 UIScrollView。它在具有以下约束的每个单元格中只有一个标签:

我用谷歌搜索了又用谷歌搜索，但找不到任何东西。有谁知道它为什么提示 UIScrollView？

Answer 1

如果你想删除警告，最快的方法是在 Storyboard中。

选择导致显示警告的 View Controller 并选择:clear all constrains in yourViewControllersName。

另一个选项是选择:重置为您的 ViewControllersName 中建议的约束。

这些操作将清除所有约束，或者将 Xcode 认为最合适的约束添加到 View Controller 。

依赖于建议的约束有时会(或者总是这样？)添加不符合您需求的约束..