Ios 在控制台上获取奇怪的日志消息（自动布局）
嗨，伙计们 我有一个600*450大小的视图，现在我把一个集合视图放在一个600*430大小的视图中。当我运行应用程序时，我在控制台上收到了这个奇怪的消息Ios 在控制台上获取奇怪的日志消息（自动布局）,ios,autolayout,uicollectionview,size-classes,Ios,Autolayout,Uicollectionview,Size Classes,嗨，伙计们 我有一个600*450大小的视图，现在我把一个集合视图放在一个600*430大小的视图中。当我运行应用程序时，我在控制台上收到了这个奇怪的消息 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 an
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)
(
"<NSLayoutConstraint:0x600000285960 V:|-(0)-[UICollectionView:0x7fb133860800] (Names: '|':UIView:0x60000019df60 )>",
"<NSLayoutConstraint:0x600000285a50 V:[UICollectionView:0x7fb133860800]-(20)-| (Names: '|':UIView:0x60000019df60 )>",
"<NSLayoutConstraint:0x600000285dc0 V:[_UILayoutGuide:0x6000001b5b60]-(0)-[UIView:0x60000019dc20]>",
"<NSLayoutConstraint:0x600000285e10 UIView:0x60000019dc20.height == 0.25*UIView:0x60000019db50.height>",
"<NSLayoutConstraint:0x6000002860e0 V:[_UILayoutGuide:0x6000001b5b60]-(0)-[UIView:0x60800019d5a0]>",
"<NSLayoutConstraint:0x600000286180 UIView:0x60000019df60.bottom == UIView:0x60000019ddc0.bottom>",
"<NSLayoutConstraint:0x600000286220 UIView:0x60000019df60.top == UIView:0x60800019d5a0.top>",
"<NSLayoutConstraint:0x600000286540 UIView:0x60000019dcf0.height == 0.25*UIView:0x60000019db50.height>",
"<NSLayoutConstraint:0x600000286590 V:[UIView:0x60000019dc20]-(0)-[UIView:0x60000019dcf0]>",
"<NSLayoutConstraint:0x6000002867c0 UIView:0x60000019ddc0.height == 0.25*UIView:0x60000019db50.height>",
"<NSLayoutConstraint:0x6000002868b0 V:[UIView:0x60000019dcf0]-(0)-[UIView:0x60000019ddc0]>",
"<NSLayoutConstraint:0x600000288d40 'UIView-Encapsulated-Layout-Height' V:[UIView:0x60000019db50(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x600000285a50 V:[UICollectionView:0x7fb133860800]-(20)-| (Names: '|':UIView:0x60000019df60 )>
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
无法同时满足约束。
可能下面列表中至少有一个约束是您不想要的。试着这样做：（1）看看每个约束，试着找出你不期望的约束；（2） 找到添加了不需要的约束的代码，然后修复它。（注意：如果您看到不理解的NSAutoresizingMaskLayoutConstraints，请参阅UIView属性TranslatesAutoResizingMaskToConstraints的文档）
(
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)
将尝试通过打破约束进行恢复
在UIViewAlertForUnsatifiableConstraints处创建一个符号断点，以便在调试器中捕获该断点。
中列出的UIView上UIConstraintBasedLayoutDebugging类别中的方法也可能会有所帮助。
我已将这4个约束应用于UICollectionView。出现这种情况是因为您添加的约束很少，因此最好选择视图，然后选择“重置为建议的约束” 如果该约束未达到标记，则最好查找每个控制约束，并检查哪个约束显示标记（黄色），然后尝试手动删除，然后添加
希望它有帮助。是否尝试添加宽度/高度约束？这可能会解决您的问题。我已经应用了@Rafalare，但没有使用@Rafalare将集合视图直接添加到控制器或任何其他视图中，如果您使用其他视图进行添加，请确保该视图也正确应用了约束。您的错误表明您正在使用比例高度约束，并且导致此日志。请尝试单击界面生成器中的“解决自动布局问题”，然后选择“更新约束”或“添加缺少的约束”。这可能会提示您问题出在哪里。