• 在调试面板增加符号调试，simbol输入 UIViewAlertForUnsatisfiableConstraints
• 在action处点击并添加
  objective-c

po [[UIWindow keyWindow] _autolayoutTrace]

swift

expr -l objc++ -O -- [[UIWindow keyWindow] _autolayoutTrace]

在log中找到 “ AMBIGUOUS”相关对象并修正

http://blog.163.com/fisher_zhang/blog/static/244839009201662293637155/
https://www.jianshu.com/p/a668e6402b59

不过我试了并没有这种问题，但为啥抱错？

UIWindow:0x100c0ef90
|   •UILayoutContainerView:0x100c10d70
|   |   UINavigationTransitionView:0x100b06380
|   |   |   UIViewControllerWrapperView:0x100c16f90
|   |   |   |   UIView:0x100c05c20
|   |   |   |   |   •UIView:0x100c161d0
|   |   |   |   |   |   UIImageView:0x100b0c450
|   |   |   |   |   |   UIButton:0x100b0cc00'VIDEOS'
|   |   |   |   |   |   |   UIButtonLabel:0x100b144e0'VIDEOS'
|   |   |   |   |   |   UIImageView:0x100c16370
|   |   |   |   |   |   UIButton:0x100b0b790'TIP'
|   |   |   |   |   |   |   UIButtonLabel:0x100b13910'TIP'
|   |   |   |   |   |   UIButton:0x100c15f00'CAMERA'
|   |   |   |   |   |   |   UIButtonLabel:0x100c19ea0'CAMERA'
|   |   |   |   |   |   *_UILayoutGuide:0x100c16a10
|   |   |   |   |   |   *_UILayoutGuide:0x100c16dd0
|   |   |   |   _UIParallaxDimmingView:0x100b21090
|   |   |   |   UIView:0x100c05a80
|   |   |   |   |   _UIParallaxDimmingView:0x100b1b170
|   |   |   |   |   |   UIImageView:0x100b1bad0
|   |   |   |   |   |   •UIView:0x100c1d880
|   |   |   |   |   |   |   UICollectionViewPlus:0x10100a800
|   |   |   |   |   |   |   |   EmptyVideoCollection:0x100c1ba10
|   |   |   |   |   |   |   |   |   UILabel:0x100c200b0'Loading..'
|   |   |   |   |   |   |   |   UIImageView:0x100c23b70
|   |   |   |   |   |   |   |   UIImageView:0x100c23d60
|   |   |   |   |   |   |   UIToolbar:0x100c1da20
|   |   |   |   |   |   |   |   UIToolbarTextButton:0x100c20340
|   |   |   |   |   |   |   |   |   _UIToolbarNavigationButton:0x100c20600'Goto Local'
|   |   |   |   |   |   |   |   |   |   UIButtonLabel:0x100c01710'Goto Local'
|   |   |   |   |   |   |   UIButton:0x100c1c2c0'Goto Local'
|   |   |   |   |   |   |   |   UIImageView:0x100b1b370
|   |   |   |   |   |   |   *_UILayoutGuide:0x100b0d3f0
|   |   |   |   |   |   |   *_UILayoutGuide:0x100b12680
|   |   |   |   |   |   |   ToolLayer:0x100b13fc0
|   |   |   |   |   |   |   |   UICollectionViewPlus:0x10107e400
|   |   |   |   |   |   |   |   |   UIImageView:0x100b22100
|   |   |   |   |   |   |   |   |   UIImageView:0x100c246f0
|   |   |   |   |   |   |   UIView:0x100b1c660
|   |   |   |   |   |   |   |   VideoPlayer:0x100b1c800
|   |   |   |   |   |   |   |   |   UIProgressView:0x100b1e320
|   |   |   |   |   |   |   |   |   |   UIImageView:0x100b1e740
|   |   |   |   |   |   |   |   |   |   UIImageView:0x100b1e930
|   |   +UINavigationBar:0x100c0bdc0
|   |   |   _UIBarBackground:0x100c0d240
|   |   |   |   UIImageView:0x100c0d850
|   |   |   |   UIVisualEffectView:0x100c0da40
|   |   |   |   |   _UIVisualEffectBackdropView:0x100c0e480
|   |   |   |   |   _UIVisualEffectFilterView:0x100c119b0
|   |   |   +UIButton:0x100b1fec0
|   |   |   |   UIImageView:0x100b257f0
|   |   |   UINavigationButton:0x100c24e70'< Back'
|   |   |   |   UIButtonLabel:0x100c270a0'< Back'
|   |   |   UIView:0x100c278c0
|   |   |   |   UINavigationItemView:0x100b20820'ALBUM'
|   |   |   |   |   UILabel:0x100b20c00'ALBUM'
|   |   |   _UINavigationBarBackIndicatorView:0x100c0dc80