无法同时满足约束条件。可能至少有一个制约因素 [英] Unable to simultaneously satisfy constraints. Probably at least one of the constraints
本文介绍了无法同时满足约束条件。可能至少有一个制约因素的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用Swift 5和故事板做iOS聊天应用程序，我的一个视图包含一个表视图和单元格，但是我收到了这种错误，我不清楚它是什么，我如何才能修复它！
显然，只要调用tableView.reload()函数，就会发生此问题。
这是我的观点
正如您在图像中看到的，有一个表视图，在表单元格内，有一个包含用于显示用户名的标签的视图，在右侧有一个用于显示用户照片的图像视图
2020-10-14 14:59:17.638363+0200 Chatiw[17620:455807] [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.
(
"<NSLayoutConstraint:0x6000000e7840 UILabel:0x7fafbe739be0.width >= 261 (active)>",
"<NSLayoutConstraint:0x6000000e7930 UIImageView:0x7fafbe73a4d0.width == 62 (active)>",
"<NSLayoutConstraint:0x6000000e7b10 UILabel:0x7fafbe739be0.leading >= UITableViewCellContentView:0x7fafbe739850.leadingMargin (active)>",
"<NSLayoutConstraint:0x6000000e7c50 H:[UILabel:0x7fafbe739be0]-(51)-[UIImageView:0x7fafbe73a4d0] (active)>",
"<NSLayoutConstraint:0x6000000e7ca0 UIImageView:0x7fafbe73a4d0.trailing == UITableViewCellContentView:0x7fafbe739850.trailingMargin (active)>",
"<NSLayoutConstraint:0x600000096580 'UIView-Encapsulated-Layout-Width' UITableViewCellContentView:0x7fafbe739850.width == 375 (active)>",
"<NSLayoutConstraint:0x6000000e7e80 'UIView-leftMargin-guide-constraint' H:|-(16)-[UILayoutGuide:0x600001a9cb60'UIViewLayoutMarginsGuide'](LTR) (active, names: '|':UITableViewCellContentView:0x7fafbe739850 )>",
"<NSLayoutConstraint:0x6000000e7f20 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x600001a9cb60'UIViewLayoutMarginsGuide']-(16)-|(LTR) (active, names: '|':UITableViewCellContentView:0x7fafbe739850 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x6000000e7840 UILabel:0x7fafbe739be0.width >= 261 (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.
2020-10-14 14:59:17.642314+0200 Chatiw[17620:455807] [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.
(
"<NSLayoutConstraint:0x600000096710 UILabel:0x7fafbe43e0f0.width >= 261 (active)>",
"<NSLayoutConstraint:0x6000000968f0 UIImageView:0x7fafbe43e360.width == 62 (active)>",
"<NSLayoutConstraint:0x6000000ea620 UILabel:0x7fafbe43e0f0.leading >= UITableViewCellContentView:0x7fafbe43dd60.leadingMargin (active)>",
"<NSLayoutConstraint:0x6000000eb8e0 H:[UILabel:0x7fafbe43e0f0]-(51)-[UIImageView:0x7fafbe43e360] (active)>",
"<NSLayoutConstraint:0x6000000eb7f0 UIImageView:0x7fafbe43e360.trailing == UITableViewCellContentView:0x7fafbe43dd60.trailingMargin (active)>",
"<NSLayoutConstraint:0x600000097250 'UIView-Encapsulated-Layout-Width' UITableViewCellContentView:0x7fafbe43dd60.width == 375 (active)>",
"<NSLayoutConstraint:0x6000000eb9d0 'UIView-leftMargin-guide-constraint' H:|-(16)-[UILayoutGuide:0x600001a9a5a0'UIViewLayoutMarginsGuide'](LTR) (active, names: '|':UITableViewCellContentView:0x7fafbe43dd60 )>",
"<NSLayoutConstraint:0x6000000eac60 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x600001a9a5a0'UIViewLayoutMarginsGuide']-(16)-|(LTR) (active, names: '|':UITableViewCellContentView:0x7fafbe43dd60 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x600000096710 UILabel:0x7fafbe43e0f0.width >= 261 (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.
2020-10-14 14:59:17.644909+0200 Chatiw[17620:455807] [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.
(
"<NSLayoutConstraint:0x6000000eb930 UILabel:0x7fafc084b7c0.width >= 261 (active)>",
"<NSLayoutConstraint:0x6000000ea8f0 UIImageView:0x7fafc084bb60.width == 62 (active)>",
"<NSLayoutConstraint:0x6000000eab20 UILabel:0x7fafc084b7c0.leading >= UITableViewCellContentView:0x7fafc084b630.leadingMargin (active)>",
"<NSLayoutConstraint:0x6000000ea8a0 H:[UILabel:0x7fafc084b7c0]-(51)-[UIImageView:0x7fafc084bb60] (active)>",
"<NSLayoutConstraint:0x6000000ea990 UIImageView:0x7fafc084bb60.trailing == UITableViewCellContentView:0x7fafc084b630.trailingMargin (active)>",
"<NSLayoutConstraint:0x6000000cf700 'UIView-Encapsulated-Layout-Width' UITableViewCellContentView:0x7fafc084b630.width == 375 (active)>",
"<NSLayoutConstraint:0x6000000d3250 'UIView-leftMargin-guide-constraint' H:|-(16)-[UILayoutGuide:0x600001a9a760'UIViewLayoutMarginsGuide'](LTR) (active, names: '|':UITableViewCellContentView:0x7fafc084b630 )>",
"<NSLayoutConstraint:0x6000000d2df0 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x600001a9a760'UIViewLayoutMarginsGuide']-(16)-|(LTR) (active, names: '|':UITableViewCellContentView:0x7fafc084b630 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x6000000eb930 UILabel:0x7fafc084b7c0.width >= 261 (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.
2020-10-14 14:59:17.647864+0200 Chatiw[17620:455807] [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.
(
"<NSLayoutConstraint:0x6000000efb60 UILabel:0x7fafc0d0a3d0.width >= 261 (active)>",
"<NSLayoutConstraint:0x6000000d2da0 UIImageView:0x7fafc084c430.width == 62 (active)>",
"<NSLayoutConstraint:0x6000000d3b60 UILabel:0x7fafc0d0a3d0.leading >= UITableViewCellContentView:0x7fafc0d09aa0.leadingMargin (active)>",
"<NSLayoutConstraint:0x6000000d3840 H:[UILabel:0x7fafc0d0a3d0]-(51)-[UIImageView:0x7fafc084c430] (active)>",
"<NSLayoutConstraint:0x6000000d37a0 UIImageView:0x7fafc084c430.trailing == UITableViewCellContentView:0x7fafc0d09aa0.trailingMargin (active)>",
"<NSLayoutConstraint:0x6000000eac10 'UIView-Encapsulated-Layout-Width' UITableViewCellContentView:0x7fafc0d09aa0.width == 375 (active)>",
"<NSLayoutConstraint:0x6000000d05f0 'UIView-leftMargin-guide-constraint' H:|-(16)-[UILayoutGuide:0x600001a9a840'UIViewLayoutMarginsGuide'](LTR) (active, names: '|':UITableViewCellContentView:0x7fafc0d09aa0 )>",
"<NSLayoutConstraint:0x6000000d3f20 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x600001a9a840'UIViewLayoutMarginsGuide']-(16)-|(LTR) (active, names: '|':UITableViewCellContentView:0x7fafc0d09aa0 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x6000000efb60 UILabel:0x7fafc0d0a3d0.width >= 261 (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.
2020-10-14 14:59:17.650367+0200 Chatiw[17620:455807] [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.
(
"<NSLayoutConstraint:0x6000000978e0 UILabel:0x7fafbe442740.width >= 261 (active)>",
"<NSLayoutConstraint:0x6000000979d0 UIImageView:0x7fafbe4429b0.width == 62 (active)>",
"<NSLayoutConstraint:0x600000097bb0 UILabel:0x7fafbe442740.leading >= UITableViewCellContentView:0x7fafbe4425b0.leadingMargin (active)>",
"<NSLayoutConstraint:0x600000097cf0 H:[UILabel:0x7fafbe442740]-(51)-[UIImageView:0x7fafbe4429b0] (active)>",
"<NSLayoutConstraint:0x600000097d40 UIImageView:0x7fafbe4429b0.trailing == UITableViewCellContentView:0x7fafbe4425b0.trailingMargin (active)>",
"<NSLayoutConstraint:0x60000009c780 'UIView-Encapsulated-Layout-Width' UITableViewCellContentView:0x7fafbe4425b0.width == 375 (active)>",
"<NSLayoutConstraint:0x600000097f20 'UIView-leftMargin-guide-constraint' H:|-(16)-[UILayoutGuide:0x600001ade840'UIViewLayoutMarginsGuide'](LTR) (active, names: '|':UITableViewCellContentView:0x7fafbe4425b0 )>",
"<NSLayoutConstraint:0x6000000efc00 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x600001ade840'UIViewLayoutMarginsGuide']-(16)-|(LTR) (active, names: '|':UITableViewCellContentView:0x7fafbe4425b0 )>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x6000000978e0 UILabel:0x7fafbe442740.width >= 261 (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.
推荐答案
解决这些问题或警告极其困难。
这里有一个关键提示。
您实际上可以将名称添加到每个！约束。执行此操作。
让名称清晰明了，就像第二个框的顶部约束一样。
您不必在应用程序中执行所有约束，只需执行相关区域中可能出现问题的约束。
首先，你必须做到这一点。：/
请注意，本网站上有大量关于此问题的讨论，有数百个问题，例如https://stackoverflow.com/a/31833436/294884
基本上，您的约束有一个小问题，具体地说，您可能在某个地方有一个过多的约束(或者更微妙地，您必须更改其中一个约束的优先级)。
您的第一步是命名技巧，至少要找出Apple指的是什么地狱约束：/
有些人建议这样做！http://wtfautolayout.com
对于此特定问题：
在这个特殊情况下，在许多可能的问题中，OP的问题是两个约束和问题：
如果您有/需要两个约束，则其中一个的优先级必须与另一个不同。
这篇关于无法同时满足约束条件。可能至少有一个制约因素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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