当我尝试以全屏模式运行视频时，YTPlayer iOS帮助程序会显示以下警告。我在iOS8中没有看到这些警告。
更新 - 这似乎是来自苹果的iOS 9错误，iOS 9设备上的UIWebView播放的全屏视频会在控制台中显示这些警告。
Unable to simultaneously satisfy constraints.
(
"<NSAutoresizingMaskLayoutConstraint:0x7fa51ea86cd0 h=-&- v=-&- _UIBackdropContentView:0x7fa51e92b600.width == _UIBackdropView:0x7fa51e9187f0.width>",
"<NSLayoutConstraint:0x7fa51defa670 H:|-(14)-[UILabel:0x7fa51ea4d030'Slide your finger down to...'] (Names: '|':_UIBackdropContentView:0x7fa51e92b600 )>",
"<NSLayoutConstraint:0x7fa51defa6c0 H:[UILabel:0x7fa51ea4d030'Slide your finger down to...']-(14)-| (Names: '|':_UIBackdropContentView:0x7fa51e92b600 )>",
"<NSLayoutConstraint:0x7fa51def9e10 H:|-(0)-[_UIBackdropView:0x7fa51e9187f0] (Names: '|':UIView:0x7fa51dddfd70 )>",
"<NSLayoutConstraint:0x7fa51def9e60 H:[_UIBackdropView:0x7fa51e9187f0]-(0)-| (Names: '|':UIView:0x7fa51dddfd70 )>",
"<NSLayoutConstraint:0x7fa51defa110 H:|-(0)-[UIView:0x7fa51dddfd70] (Names: '|':AVAlphaUpdatingView:0x7fa51dad7140 )>",
"<NSLayoutConstraint:0x7fa51defa160 H:[UIView:0x7fa51dddfd70]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7fa51dad7140 )>",
"<NSLayoutConstraint:0x7fa51ea8d1a0 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7fa51dad7140(0)]>"
）
"<NSAutoresizingMaskLayoutConstraint:0x7fa51ea86cd0 h=-&- v=-&- _UIBackdropContentView:0x7fa51e92b600.width == _UIBackdropView:0x7fa51e9187f0.width>",
"<NSLayoutConstraint:0x7fa51defa770 H:|-(14)-[UILabel:0x7fa51ea48b40'Hi-Speed Scrubbing'] (Names: '|':_UIBackdropContentView:0x7fa51e92b600 )>",
"<NSLayoutConstraint:0x7fa51defa7f0 H:[UILabel:0x7fa51ea48b40'Hi-Speed Scrubbing']-(14)-| (Names: '|':_UIBackdropContentView:0x7fa51e92b600 )>",
"<NSLayoutConstraint:0x7fa51def9e10 H:|-(0)-[_UIBackdropView:0x7fa51e9187f0] (Names: '|':UIView:0x7fa51dddfd70 )>",
"<NSLayoutConstraint:0x7fa51def9e60 H:[_UIBackdropView:0x7fa51e9187f0]-(0)-| (Names: '|':UIView:0x7fa51dddfd70 )>",
"<NSLayoutConstraint:0x7fa51defa110 H:|-(0)-[UIView:0x7fa51dddfd70] (Names: '|':AVAlphaUpdatingView:0x7fa51dad7140 )>",
"<NSLayoutConstraint:0x7fa51defa160 H:[UIView:0x7fa51dddfd70]-(0)-| (Names: '|':AVAlphaUpdatingView:0x7fa51dad7140 )>",
"<NSLayoutConstraint:0x7fa51ea8d1a0 'UIView-Encapsulated-Layout-Width' H:[AVAlphaUpdatingView:0x7fa51dad7140(0)]>"
）