我使用ionic / angular和cordova并使用HTML5视频标签播放视频，但在Xcode中我在播放视频时收到以下错误。我第二次点击播放后出现错误。所以实际上，PLAY - ＆gt;完成 - ＆gt;播放 - ＆gt; ERROR。
虽然虽然它会引发错误，但视频会按预期播放，但似乎没有任何问题，但我不知道这个错误在ObjC的背景下意味着什么，所以如果有人能告诉我它是否值得担心？
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:0x7fbfcdd69150 h=-&- v=-&- _UIBackdropContentView:0x7fbfcdf8a510.width == _UIBackdropView:0x7fbfcde9ad80.width>",
"<NSLayoutConstraint:0x7fbfcdd477a0 H:|-(0)-[UIView:0x7fbfcde996c0] (Names: '|':_UIBackdropContentView:0x7fbfcdf8a510 )>",
"<NSLayoutConstraint:0x7fbfcdd477f0 H:[UIView:0x7fbfcde996c0]-(0)-| (Names: '|':_UIBackdropContentView:0x7fbfcdf8a510 )>",
"<NSLayoutConstraint:0x7fbfcdd473b0 H:|-(0)-[_UIBackdropView:0x7fbfcde9ad80] (Names: '|':UIView:0x7fbfcde46fb0 )>",
"<NSLayoutConstraint:0x7fbfcdd479c0 H:[_UIBackdropView:0x7fbfcde9ad80]-(0)-| (Names: '|':UIView:0x7fbfcde46fb0 )>",
"<NSLayoutConstraint:0x7fbfcdd47ad0 H:|-(0)-[UIView:0x7fbfcde46fb0] (Names: '|':AVAlphaUpdatingView:0x7fbfcde47c80 )>",
"<NSLayoutConstraint:0x7fbfcdd478b0 H:[UIView:0x7fbfcde46fb0]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7fbfcde47c80 )>",
"<NSLayoutConstraint:0x7fbfcdcaa410 H:|-(14)-[AVButton:0x7fbfcde49c30'Done'](LTR) (Names: '|':UIView:0x7fbfcde996c0 )>",
"<NSLayoutConstraint:0x7fbfcdcab350 H:[AVButton:0x7fbfcde49c30'Done']-(0)-[UILabel:0x7fbfcde7c370'0:03'](LTR)>",
"<NSLayoutConstraint:0x7fbfcdcaab20 H:[UILabel:0x7fbfcde7c370'0:03'(55)]>",
"<NSLayoutConstraint:0x7fbfcdcdbf20 H:[UILabel:0x7fbfcde7c370'0:03']-(6)-[AVScrubber:0x7fbfcde98ff0](LTR)>",
"<NSLayoutConstraint:0x7fbfcdcdbf70 AVScrubber:0x7fbfcde98ff0.right == UILabel:0x7fbfcde52ba0'\U200e-0:43'.left - 6>",
"<NSLayoutConstraint:0x7fbfcdc84860 UILabel:0x7fbfcde52ba0'\U200e-0:43'.right == AVButton:0x7fbfcde3f680.left>",
"<NSLayoutConstraint:0x7fbfcdc848b0 H:[UILabel:0x7fbfcde52ba0'\U200e-0:43'(59)]>",
"<NSLayoutConstraint:0x7fbfcdcdbfc0 AVButton:0x7fbfcde3f680.right == UIView:0x7fbfcde996c0.right - 15>",
"<NSLayoutConstraint:0x7fbfcd90eda0 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7fbfcde47c80(0)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x7fbfcdd477f0 H:[UIView:0x7fbfcde996c0]-(0)-| (Names: '|':_UIBackdropContentView:0x7fbfcdf8a510 )>
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.