xcode 无法同时满足情节提要中嵌入的 AVPlayerViewController 的约束警告
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时间：2020-09-15 07:58:06 来源:igfitidea点击:
Unable to simultaneously satisfy constraints Warnings with AVPlayerViewController embedded in storyboard
提问by Ishan Handa
I'm trying to set up an AVPlayerViewController completely through storyboards by embedding in a separate View Controller.
我试图通过嵌入一个单独的视图控制器来完全通过故事板设置一个 AVPlayerViewController。
Steps:
脚步：
- Create Single View Application in Xcode.
- Embed VC in navigation Controller.
- Add toolbar at the bottom.(pinned to superView (Leading, Trailing, Bottom Layout Guide, Height(44)).
- Add container View in parent View Controller.(pinned to superView (Leading, Trailing), Top Layout Guide, toolbar Top).
- Remove the default View Controller that comes with container view.
- Drag AV Player View Controller object from Object Library.
- Connect embed segue from Container View to AV Player View Controller.
- 在 Xcode 中创建单视图应用程序。
- 在导航控制器中嵌入 VC。
- 在底部添加工具栏。（固定到超级视图（前导，尾随，底部布局指南，高度（44））。
- 在父视图控制器中添加容器视图。（固定到超级视图（前导，尾随），顶部布局指南，工具栏顶部）。
- 删除容器视图附带的默认视图控制器。
- 从对象库中拖动 AV Player View Controller 对象。
- 将 embed segue 从 Container View 连接到 AV Player View Controller。
NO CODE ADDED.
没有添加代码。
This is what my storyboardlooks like:
这是我的故事板的样子：
View hierarchy:
查看层次结构：
Everything runs fine: BUT THE PROBLEM IS:As soon as i run it I get these warnings in the debugger:
一切都运行良好： 但问题是：一旦我运行它，我就会在调试器中收到这些警告：
2015-09-30 12:58:35.904 AVPlayerTest[9352:446772] 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)
(
"<NSAutoresizingMaskLayoutConstraint:0x7f93259513b0 h=-&- v=-&- _UIBackdropContentView:0x7f9325860000.width == _UIBackdropView:0x7f932585e990.width>",
"<NSLayoutConstraint:0x7f932592bc70 H:|-(14)-[UILabel:0x7f9325925590'Hi-Speed Scrubbing'] (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592bcf0 H:[UILabel:0x7f9325925590'Hi-Speed Scrubbing']-(14)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592b770 H:|-(0)-[_UIBackdropView:0x7f932585e990] (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b7f0 H:[_UIBackdropView:0x7f932585e990]-(0)-| (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b450 H:|-(0)-[UIView:0x7f932585e830] (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592b4d0 H:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932594aa10 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7f932585e310(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f932592bcf0 H:[UILabel:0x7f9325925590'Hi-Speed Scrubbing']-(14)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>
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.
2015-09-30 12:58:35.905 AVPlayerTest[9352:446772] 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)
(
"<NSAutoresizingMaskLayoutConstraint:0x7f93259513b0 h=-&- v=-&- _UIBackdropContentView:0x7f9325860000.width == _UIBackdropView:0x7f932585e990.width>",
"<NSLayoutConstraint:0x7f932592bdd0 H:|-(14)-[UILabel:0x7f9325929bb0'Slide your finger up to a...'] (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592be50 H:[UILabel:0x7f9325929bb0'Slide your finger up to a...']-(14)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592b770 H:|-(0)-[_UIBackdropView:0x7f932585e990] (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b7f0 H:[_UIBackdropView:0x7f932585e990]-(0)-| (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b450 H:|-(0)-[UIView:0x7f932585e830] (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592b4d0 H:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932594aa10 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7f932585e310(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f932592be50 H:[UILabel:0x7f9325929bb0'Slide your finger up to a...']-(14)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>
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.
2015-09-30 12:58:35.906 AVPlayerTest[9352:446772] 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:0x7f932592b5e0 V:|-(>=0)-[UIView:0x7f932585e830] (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592b660 V:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592af50 V:[UIView:0x7f932585e830(44)]>",
"<NSLayoutConstraint:0x7f9325952c30 'UIView-Encapsulated-Layout-Height' V:[AVAlphaUpdatingView:0x7f932585e310(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f932592b660 V:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>
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.
2015-09-30 12:58:35.907 AVPlayerTest[9352:446772] 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)
(
"<NSAutoresizingMaskLayoutConstraint:0x7f93259513b0 h=-&- v=-&- _UIBackdropContentView:0x7f9325860000.width == _UIBackdropView:0x7f932585e990.width>",
"<NSLayoutConstraint:0x7f932592ba00 H:|-(0)-[UIView:0x7f932585fbc0] (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592ba80 H:[UIView:0x7f932585fbc0]-(0)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592b770 H:|-(0)-[_UIBackdropView:0x7f932585e990] (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b7f0 H:[_UIBackdropView:0x7f932585e990]-(0)-| (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b450 H:|-(0)-[UIView:0x7f932585e830] (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592b4d0 H:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932582a040 H:|-(14)-[AVButton:0x7f93258609b0](LTR) (Names: '|':UIView:0x7f932585fbc0 )>",
"<NSLayoutConstraint:0x7f9325829f90 H:[AVButton:0x7f93258609b0]-(15)-[UILabel:0x7f932347dc20'--:--'](LTR)>",
"<NSLayoutConstraint:0x7f9325839550 H:[UILabel:0x7f932347dc20'--:--']-(12)-[AVScrubber:0x7f93234a4350](LTR)>",
"<NSLayoutConstraint:0x7f932585a2f0 AVScrubber:0x7f93234a4350.right == UILabel:0x7f932583a470'--:--'.left - 12>",
"<NSLayoutConstraint:0x7f932580b390 UILabel:0x7f932583a470'--:--'.right == AVButton:0x7f932585e480.left - 15>",
"<NSLayoutConstraint:0x7f932586f490 AVButton:0x7f932585e480.right == AVButton:0x7f93234d1790.left - 10>",
"<NSLayoutConstraint:0x7f932580b340 AVButton:0x7f93234d1790.right == AVButton:0x7f93234d6540.left - 10>",
"<NSLayoutConstraint:0x7f932584c870 AVButton:0x7f93234d6540.right == UIView:0x7f932585fbc0.right - 14>",
"<NSLayoutConstraint:0x7f932594aa10 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7f932585e310(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f9325829f90 H:[AVButton:0x7f93258609b0]-(15)-[UILabel:0x7f932347dc20'--:--'](LTR)>
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.
2015-09-30 12:58:35.909 AVPlayerTest[9352:446772] 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)
(
"<NSAutoresizingMaskLayoutConstraint:0x7f93259513b0 h=-&- v=-&- _UIBackdropContentView:0x7f9325860000.width == _UIBackdropView:0x7f932585e990.width>",
"<NSLayoutConstraint:0x7f932592ba00 H:|-(0)-[UIView:0x7f932585fbc0] (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592ba80 H:[UIView:0x7f932585fbc0]-(0)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592b770 H:|-(0)-[_UIBackdropView:0x7f932585e990] (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b7f0 H:[_UIBackdropView:0x7f932585e990]-(0)-| (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b450 H:|-(0)-[UIView:0x7f932585e830] (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592b4d0 H:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932582a040 H:|-(14)-[AVButton:0x7f93258609b0](LTR) (Names: '|':UIView:0x7f932585fbc0 )>",
"<NSLayoutConstraint:0x7f932586f490 AVButton:0x7f932585e480.right == AVButton:0x7f93234d1790.left - 10>",
"<NSLayoutConstraint:0x7f932580b340 AVButton:0x7f93234d1790.right == AVButton:0x7f93234d6540.left - 10>",
"<NSLayoutConstraint:0x7f932584c870 AVButton:0x7f93234d6540.right == UIView:0x7f932585fbc0.right - 14>",
"<NSLayoutConstraint:0x7f9325859740 H:[AVButton:0x7f93258609b0]-(>=15)-[UILabel:0x7f93234e53f0'Live Broadcast'](LTR)>",
"<NSLayoutConstraint:0x7f932583bea0 UILabel:0x7f93234e53f0'Live Broadcast'.right <= AVButton:0x7f932585e480.left - 15>",
"<NSLayoutConstraint:0x7f932594aa10 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7f932585e310(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f9325859740 H:[AVButton:0x7f93258609b0]-(>=15)-[UILabel:0x7f93234e53f0'Live Broadcast'](LTR)>
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.
2015-09-30 12:58:35.910 AVPlayerTest[9352:446772] 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)
(
"<NSAutoresizingMaskLayoutConstraint:0x7f93259513b0 h=-&- v=-&- _UIBackdropContentView:0x7f9325860000.width == _UIBackdropView:0x7f932585e990.width>",
"<NSLayoutConstraint:0x7f9323520650 H:|-(0)-[UIActivityIndicatorView:0x7f93234e6ee0] (Names: '|':UIView:0x7f93234e6120 )>",
"<NSLayoutConstraint:0x7f93235206a0 H:[UIActivityIndicatorView:0x7f93234e6ee0]-(10)-[UILabel:0x7f93235203b0'Loading\U2026']>",
"<NSLayoutConstraint:0x7f9323520740 H:[UILabel:0x7f93235203b0'Loading\U2026']-(0)-| (Names: '|':UIView:0x7f93234e6120 )>",
"<NSLayoutConstraint:0x7f9323521f90 H:|-(>=0)-[UIView:0x7f93234e6120] (Names: '|':AVLoadingIndicatorView:0x7f93234e5fb0 )>",
"<NSLayoutConstraint:0x7f9323510da0 UIView:0x7f93234e6120.centerX == AVLoadingIndicatorView:0x7f93234e5fb0.centerX>",
"<NSLayoutConstraint:0x7f932592ba00 H:|-(0)-[UIView:0x7f932585fbc0] (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592ba80 H:[UIView:0x7f932585fbc0]-(0)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592b770 H:|-(0)-[_UIBackdropView:0x7f932585e990] (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b7f0 H:[_UIBackdropView:0x7f932585e990]-(0)-| (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b450 H:|-(0)-[UIView:0x7f932585e830] (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592b4d0 H:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932582a040 H:|-(14)-[AVButton:0x7f93258609b0](LTR) (Names: '|':UIView:0x7f932585fbc0 )>",
"<NSLayoutConstraint:0x7f932586f490 AVButton:0x7f932585e480.right == AVButton:0x7f93234d1790.left - 10>",
"<NSLayoutConstraint:0x7f932580b340 AVButton:0x7f93234d1790.right == AVButton:0x7f93234d6540.left - 10>",
"<NSLayoutConstraint:0x7f932584c870 AVButton:0x7f93234d6540.right == UIView:0x7f932585fbc0.right - 14>",
"<NSLayoutConstraint:0x7f932583bbc0 H:[AVButton:0x7f93258609b0]-(>=15)-[AVLoadingIndicatorView:0x7f93234e5fb0](LTR)>",
"<NSLayoutConstraint:0x7f932583bc10 AVLoadingIndicatorView:0x7f93234e5fb0.right <= AVButton:0x7f932585e480.left - 15>",
"<NSLayoutConstraint:0x7f932594aa10 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7f932585e310(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f93235206a0 H:[UIActivityIndicatorView:0x7f93234e6ee0]-(10)-[UILabel:0x7f93235203b0'Loading…']>
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.
2015-09-30 12:58:35.912 AVPlayerTest[9352:446772] 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)
(
"<NSAutoresizingMaskLayoutConstraint:0x7f93259513b0 h=-&- v=-&- _UIBackdropContentView:0x7f9325860000.width == _UIBackdropView:0x7f932585e990.width>",
"<NSLayoutConstraint:0x7f9323521f90 H:|-(>=0)-[UIView:0x7f93234e6120] (Names: '|':AVLoadingIndicatorView:0x7f93234e5fb0 )>",
"<NSLayoutConstraint:0x7f9323510da0 UIView:0x7f93234e6120.centerX == AVLoadingIndicatorView:0x7f93234e5fb0.centerX>",
"<NSLayoutConstraint:0x7f932592ba00 H:|-(0)-[UIView:0x7f932585fbc0] (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592ba80 H:[UIView:0x7f932585fbc0]-(0)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592b770 H:|-(0)-[_UIBackdropView:0x7f932585e990] (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b7f0 H:[_UIBackdropView:0x7f932585e990]-(0)-| (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b450 H:|-(0)-[UIView:0x7f932585e830] (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592b4d0 H:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932582a040 H:|-(14)-[AVButton:0x7f93258609b0](LTR) (Names: '|':UIView:0x7f932585fbc0 )>",
"<NSLayoutConstraint:0x7f932586f490 AVButton:0x7f932585e480.right == AVButton:0x7f93234d1790.left - 10>",
"<NSLayoutConstraint:0x7f932580b340 AVButton:0x7f93234d1790.right == AVButton:0x7f93234d6540.left - 10>",
"<NSLayoutConstraint:0x7f932584c870 AVButton:0x7f93234d6540.right == UIView:0x7f932585fbc0.right - 14>",
"<NSLayoutConstraint:0x7f932583bbc0 H:[AVButton:0x7f93258609b0]-(>=15)-[AVLoadingIndicatorView:0x7f93234e5fb0](LTR)>",
"<NSLayoutConstraint:0x7f932583bc10 AVLoadingIndicatorView:0x7f93234e5fb0.right <= AVButton:0x7f932585e480.left - 15>",
"<NSLayoutConstraint:0x7f932594aa10 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7f932585e310(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f9323510da0 UIView:0x7f93234e6120.centerX == AVLoadingIndicatorView:0x7f93234e5fb0.centerX>
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.
2015-09-30 12:58:35.912 AVPlayerTest[9352:446772] 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)
(
"<NSAutoresizingMaskLayoutConstraint:0x7f93259513b0 h=-&- v=-&- _UIBackdropContentView:0x7f9325860000.width == _UIBackdropView:0x7f932585e990.width>",
"<NSLayoutConstraint:0x7f9323521f90 H:|-(>=0)-[UIView:0x7f93234e6120] (Names: '|':AVLoadingIndicatorView:0x7f93234e5fb0 )>",
"<NSLayoutConstraint:0x7f9323510d10 H:[UIView:0x7f93234e6120]-(>=0)-| (Names: '|':AVLoadingIndicatorView:0x7f93234e5fb0 )>",
"<NSLayoutConstraint:0x7f932592ba00 H:|-(0)-[UIView:0x7f932585fbc0] (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592ba80 H:[UIView:0x7f932585fbc0]-(0)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592b770 H:|-(0)-[_UIBackdropView:0x7f932585e990] (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b7f0 H:[_UIBackdropView:0x7f932585e990]-(0)-| (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b450 H:|-(0)-[UIView:0x7f932585e830] (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592b4d0 H:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932582a040 H:|-(14)-[AVButton:0x7f93258609b0](LTR) (Names: '|':UIView:0x7f932585fbc0 )>",
"<NSLayoutConstraint:0x7f932586f490 AVButton:0x7f932585e480.right == AVButton:0x7f93234d1790.left - 10>",
"<NSLayoutConstraint:0x7f932580b340 AVButton:0x7f93234d1790.right == AVButton:0x7f93234d6540.left - 10>",
"<NSLayoutConstraint:0x7f932584c870 AVButton:0x7f93234d6540.right == UIView:0x7f932585fbc0.right - 14>",
"<NSLayoutConstraint:0x7f932583bbc0 H:[AVButton:0x7f93258609b0]-(>=15)-[AVLoadingIndicatorView:0x7f93234e5fb0](LTR)>",
"<NSLayoutConstraint:0x7f932583bc10 AVLoadingIndicatorView:0x7f93234e5fb0.right <= AVButton:0x7f932585e480.left - 15>",
"<NSLayoutConstraint:0x7f932594aa10 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7f932585e310(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f9323510d10 H:[UIView:0x7f93234e6120]-(>=0)-| (Names: '|':AVLoadingIndicatorView:0x7f93234e5fb0 )>
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.
2015-09-30 12:58:35.913 AVPlayerTest[9352:446772] 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)
(
"<NSAutoresizingMaskLayoutConstraint:0x7f93259513b0 h=-&- v=-&- _UIBackdropContentView:0x7f9325860000.width == _UIBackdropView:0x7f932585e990.width>",
"<NSLayoutConstraint:0x7f932592ba00 H:|-(0)-[UIView:0x7f932585fbc0] (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592ba80 H:[UIView:0x7f932585fbc0]-(0)-| (Names: '|':_UIBackdropContentView:0x7f9325860000 )>",
"<NSLayoutConstraint:0x7f932592b770 H:|-(0)-[_UIBackdropView:0x7f932585e990] (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b7f0 H:[_UIBackdropView:0x7f932585e990]-(0)-| (Names: '|':UIView:0x7f932585e830 )>",
"<NSLayoutConstraint:0x7f932592b450 H:|-(0)-[UIView:0x7f932585e830] (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932592b4d0 H:[UIView:0x7f932585e830]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7f932585e310 )>",
"<NSLayoutConstraint:0x7f932582a040 H:|-(14)-[AVButton:0x7f93258609b0](LTR) (Names: '|':UIView:0x7f932585fbc0 )>",
"<NSLayoutConstraint:0x7f932586f490 AVButton:0x7f932585e480.right == AVButton:0x7f93234d1790.left - 10>",
"<NSLayoutConstraint:0x7f932580b340 AVButton:0x7f93234d1790.right == AVButton:0x7f93234d6540.left - 10>",
"<NSLayoutConstraint:0x7f932584c870 AVButton:0x7f93234d6540.right == UIView:0x7f932585fbc0.right - 14>",
"<NSLayoutConstraint:0x7f932583bbc0 H:[AVButton:0x7f93258609b0]-(>=15)-[AVLoadingIndicatorView:0x7f93234e5fb0](LTR)>",
"<NSLayoutConstraint:0x7f932583bc10 AVLoadingIndicatorView:0x7f93234e5fb0.right <= AVButton:0x7f932585e480.left - 15>",
"<NSLayoutConstraint:0x7f932594aa10 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7f932585e310(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7f932583bbc0 H:[AVButton:0x7f93258609b0]-(>=15)-[AVLoadingIndicatorView:0x7f93234e5fb0](LTR)>
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.
Sorry for the long Log, but all of it comes up at once so including it. What am I missing? Auto layout is working great. Even on rotation. Why am I seeing these warnings?
很抱歉很长的日志，但所有这些都是一次出现的，所以包括它。我错过了什么？自动布局效果很好。即使在轮换。为什么我会看到这些警告？
Added Sample Project
添加示例项目
P.S.: Using Xcode Version 7.0
PS：使用 Xcode 7.0 版
UPDATE
更新
Unchecking Shows Playback Controlson the AVPlayerViewControllerin the Attributes Inspector fixes it somehow and I see no warnings. But I need the controls. Seems more and more like a bug.
取消选中Shows Playback Controls的AVPlayerViewController在属性检查器修复它在某种程度上，我看不出有任何警告。但我需要控件。似乎越来越像一个错误。
回答by gbitaudeau
In fact, I think it's bug on Apple side.
事实上，我认为这是苹果方面的错误。
I found a workaround : set showsPlaybackControls to YES after the AVPlayerViewController.player have been set.
我找到了一个解决方法：在设置 AVPlayerViewController.player 后将 showsPlaybackControls 设置为 YES。
I modify your sample with the following lines and no more Constraint error appears :
我使用以下几行修改了您的示例，并且不再出现约束错误：
@interface ViewController ()
@property(weak, nonatomic) AVPlayerViewController * playerViewController;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSString *path = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"mp4"];
NSURL *url = [[NSURL alloc] initFileURLWithPath: path];
AVPlayer * player = [AVPlayer playerWithURL:url];
self.playerViewController.player = player;
self.playerViewController.showsPlaybackControls = YES;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:@"AVPlayerSegue"]) {
self.playerViewController = segue.destinationViewController;
}
}
@end
Please note that the file test.mp4have been added to the project.
请注意，该文件test.mp4已添加到项目中。
回答by DevAndArtist
In my case I allow on iPhones only the portrait mode while I want the AVPlayerViewControllerto have all directions.
就我而言，我在 iPhone 上只允许纵向模式，而我希望AVPlayerViewController拥有所有方向。
In AppDelegateI have code that looks like this:
在AppDelegate我有这样的代码：
public func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> UIInterfaceOrientationMask {
if self.window?.rootViewController?.presentedViewController is AVPlayerViewController {
return .All
}
return Device.current.contains(.iPhone) ? [.Portrait, .PortraitUpsideDown] : .All
}
When AVPlayerViewControlleris presented modally, rotated to landscape and dismissed I'll get a very smiler error stack that some constraints broke.
当AVPlayerViewController以模态呈现，旋转到横向并被解雇时，我会得到一个非常微笑的错误堆栈，其中一些约束被破坏了。
To workaround I added this code to my RootViewController, which also presents any instance of AVPlayerViewControllerin my application:
为了解决这个问题，我将此代码添加到 my 中RootViewController，它也显示AVPlayerViewController了我的应用程序中的任何实例：
public override func dismissViewControllerAnimated(flag: Bool, completion: (() -> Void)?) {
if let playerViewController = self.presentedViewController as? AVPlayerViewController {
playerViewController.showsPlaybackControls = false
}
super.dismissViewControllerAnimated(flag, completion: completion)
}
Basically I'm catching the moment when the user taps on the dismiss button and use the workaround found in original question post.
基本上我抓住了用户点击关闭按钮并使用原始问题帖子中找到的解决方法的那一刻。
回答by Marius Tanasoiu
Unfortunately this bug is still present in ios 10.1. Anyway, I have observed that if I present the view controller with the seekTime set to 0, the bug is not present. So, my solution was to pause the player, retain the currentTime, seek the player to 0, present the controller and on the completion do the following: seek to the retained time and play again.
不幸的是，这个错误仍然存在于 ios 10.1 中。无论如何，我观察到，如果我将seekTime 设置为0 的视图控制器显示出来，则该错误不存在。因此，我的解决方案是暂停播放器，保留 currentTime，将播放器定位到 0，呈现控制器并在完成时执行以下操作：定位到保留的时间并再次播放。
AVPlayer *player;
AVPlayerViewController *avPlayerController;
CMTime currentTime;
- (void)viewDidLoad {
[super viewDidLoad];
NSURL *videoURL = [NSURL URLWithString:@"https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"];
player = [AVPlayer playerWithURL:videoURL];
AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
[self.playerView.layer addSublayer:playerLayer];
playerLayer.frame = self.playerView.bounds;
avPlayerController = [[AVPlayerViewController alloc] init];
avPlayerController.player = player;
}
- (IBAction)fullScreen:(id)sender {
[player pause];
currentTime = player.currentTime;
[player seekToTime:CMTimeMake(0, 1)];
[self presentViewController:avPlayerController animated:YES completion:^{
[avPlayerController.player seekToTime:currentTime];
[avPlayerController.player play];
}];
}
回答by Danny Bravo
I downloaded your code and took a look at it. You are not doing anything wrong. The fact that you can uncheck "Shows Playback Control" seems to indicate that the problem lies with the AVKit framework. I've even tried setting the value to false in the XIB file and then calling [self setShowsPlaybackControls:YES];after viewDidAppear:with the same results. This is most definitely an Apple bug and you should raise a bug report.
我下载了你的代码并查看了它。你没有做错任何事。您可以取消选中“显示播放控制”这一事实似乎表明问题出在 AVKit 框架上。我甚至试过值设置为在XIB文件错误，然后调用[self setShowsPlaybackControls:YES];后viewDidAppear:具有相同的结果。这绝对是 Apple 的错误，您应该提交错误报告。
回答by jomafer
I realised this is happening when you try to present the same AVPlayerViewController instance (using a strong reference property) the second, third...etc time and the player controls are not reset (i.e. the progress is not at the beginning).
当您尝试在第二次、第三次...等时间呈现相同的 AVPlayerViewController 实例（使用强引用属性）并且播放器控件未重置（即进度不在开始时）时，我意识到会发生这种情况。
Actually, if you are facing the same scenario, before tapping "Done" try to drag the progress bar to the beginning and present AVPlayerViewController again. Then the auto layout issue should disappear!
实际上，如果您遇到相同的情况，请在点击“完成”之前尝试将进度条拖到开头并再次呈现 AVPlayerViewController。那么自动布局问题应该会消失！
So basically the Autolayout issue (Apple issue by the way) can be fixed if you reset the controls before dismissing AVPlayerViewController. But, what if you want to present the same video? In my case I want to keep the reference to AVPlayerItem:
因此，如果您在解除 AVPlayerViewController 之前重置控件，基本上可以修复 Autolayout 问题（顺便说一下 Apple 问题）。但是，如果您想呈现相同的视频怎么办？就我而言，我想保留对 AVPlayerItem 的引用：
@property (strong, nonatomic) AVPlayerItem *playerItem;
But I don't want this crash to happen:
但我不希望发生这种崩溃：
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'An AVPlayerItem cannot be associated with more than one instance of AVPlayer'
*** First throw call stack:
(0x184035900 0x1836a3f80 0x18a254958 0x18a23fc14 0x100054a2c 0x188d5fe50 0x188d5fdcc 0x188d47a88 0x188d5f6e4 0x188d18294 0x188d58820 0x188d57e1c 0x188d284cc 0x188d26794 0x183fecefc 0x183fec990 0x183fea690 0x183f19680 0x185428088 0x188d90d90 0x1000eea78 0x183aba8b8)
libc++abi.dylib: terminating with uncaught exception of type NSException
So my workaround was to create a copy of the AVPLayerItem every time I push AVPlayerViewController. With that way, the crash and auto layout issue are gone. However, the video is reset every time you push the player.
所以我的解决方法是每次推送 AVPlayerViewController 时都创建一个 AVPlayerItem 的副本。这样，崩溃和自动布局问题就消失了。但是，每次按下播放器时，视频都会重置。
AVPlayerViewController *playerViewController = [AVPlayerViewController new];
playerViewController.player = [[AVPlayer alloc] initWithPlayerItem:self.playerItem.copy];
回答by baydi
This warning is saying that you have used one constraint extra that didn't need to be use.
此警告表示您使用了一个不需要使用的额外约束。
ToolBarHeightby default is 44for all iphone devices here you have used height constraint for UIToolBar. So the Toolbar Height Constraint is extra here , Remove this constraint the warning will be remove automatically
默认情况下，所有 iphone 设备的ToolBarHeight为44，您在这里使用了高度约束UIToolBar。所以工具栏高度约束在这里是额外的，删除这个约束警告将被自动删除
