キーボードがポップアップしたときにWKWebViewが問題を引き起こす

Question

WKWebViewの入力にフォーカスがあると、制約エラーがポップアップします。

コード：

class ViewController: UIViewController { 
    override func viewDidLoad() { 
     super.viewDidLoad(); 
     let wv = WKWebView(frame: CGRect(x: 100, y: 100, width: 100, height: 100)); 
     wv.loadHTMLString("<input type='text'/>", baseURL: nil); // it also can be select, it makes no difference 
     view.addSubview(wv); 
    } 
} 

エラーログ：

2017-11-05 00:26:28.861439+0700 achievator[20048:75393577] [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.  (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) (
    "<NSAutoresizingMaskLayoutConstraint:0x60c0000955e0 h=-&- v=-&- UIToolbar:0x7f8540419570.width == 
_UIInputViewContent:0x7f8540411830.width (active)>", 
    "<NSAutoresizingMaskLayoutConstraint:0x60c000095720 h=--& v=--& _UIInputViewContent:0x7f8540411830.width == 0 (active)>", 
    "<NSLayoutConstraint:0x60800009a9a0 H:|-(0)-[_UIButtonBarStackView:0x7f854041b2d0] (active, names: '|':_UIToolbarContentView:0x7f8540402de0)>", 
    "<NSLayoutConstraint:0x60800009a9f0 _UIButtonBarStackView:0x7f854041b2d0.trailing == _UIToolbarContentView:0x7f8540402de0.trailing + 8 (active)>", 
    "<NSLayoutConstraint:0x608000099a00 _UIToolbarContentView:0x7f8540402de0.trailing == UIToolbar:0x7f8540419570.trailing (active)>", 
    "<NSLayoutConstraint:0x608000099aa0 H:|-(0)-[_UIToolbarContentView:0x7f8540402de0] (active, names: '|':UIToolbar:0x7f8540419570)>", 
    "<NSLayoutConstraint:0x6040000981a0 H:|-(0)-[_UIModernBarButton:0x7f854050ef70] (active, names: '|':_UIButtonBarButton:0x7f854050e7f0)>", 
    "<NSLayoutConstraint:0x6040000981f0 H:[_UIModernBarButton:0x7f854050ef70]-(>=8)-| (active, names: '|':_UIButtonBarButton:0x7f854050e7f0)>", 
    "<NSLayoutConstraint:0x6040000999b0 H:|-(8)-[_UIModernBarButton:0x7f8540512450'Done'] (active, names: '|':_UIButtonBarButton:0x7f8540511660)>", 
    "<NSLayoutConstraint:0x604000099a00 H:[_UIModernBarButton:0x7f8540512450'Done']-(0)-| (active, names: '|':_UIButtonBarButton:0x7f8540511660)>", 
    "<NSLayoutConstraint:0x60c000094690 'UISV-canvas-connection' UILayoutGuide:0x6080001a9a00'UIViewLayoutMarginsGuide'.leading == 
_UIButtonBarButton:0x7f854050e7f0.leading (active)>", 
    "<NSLayoutConstraint:0x60c0000946e0 'UISV-canvas-connection' UILayoutGuide:0x6080001a9a00'UIViewLayoutMarginsGuide'.trailing == 
_UIButtonBarButton:0x7f8540511660.trailing (active)>", 
    "<NSLayoutConstraint:0x60c000094780 'UISV-spacing' H:[_UIButtonBarButton:0x7f854050e7f0]-(0)-[UIView:0x7f854050f4c0] (active)>", 
    "<NSLayoutConstraint:0x60c000094960 'UISV-spacing' H:[UIView:0x7f854050f4c0]-(0)-[_UIButtonBarButton:0x7f854050ea30] (active)>", 
    "<NSLayoutConstraint:0x60c000094a00 'UISV-spacing' H:[_UIButtonBarButton:0x7f854050ea30]-(0)-[UIView:0x7f8540511480] (active)>", 
    "<NSLayoutConstraint:0x60c000094a50 'UISV-spacing' H:[UIView:0x7f8540511480]-(0)-[_UIButtonBarButton:0x7f8540511660] (active)>", 
    "<NSLayoutConstraint:0x60800009a6d0 'UIView-leftMargin-guide-constraint' H:|-(0)-[UILayoutGuide:0x6080001a9a00'UIViewLayoutMarginsGuide'](LTR) (active, names: '|':_UIButtonBarStackView:0x7f854041b2d0)>", 
    "<NSLayoutConstraint:0x60800009a770 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x6080001a9a00'UIViewLayoutMarginsGuide']-(0)-|(LTR) (active, names: '|':_UIButtonBarStackView:0x7f854041b2d0)>") 

Will attempt to recover by breaking constraint <NSLayoutConstraint:0x6040000981f0 H:[_UIModernBarButton:0x7f854050ef70]-(>=8)-| (active, names: '|':_UIButtonBarButton:0x7f854050e7f0)> 

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. 2017-11-05 00:26:28.863156+0700 achievator[20048:75393577] [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.  (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) (
    "<NSAutoresizingMaskLayoutConstraint:0x60c0000955e0 h=-&- v=-&- UIToolbar:0x7f8540419570.width == 
_UIInputViewContent:0x7f8540411830.width (active)>", 
    "<NSAutoresizingMaskLayoutConstraint:0x60c000095720 h=--& v=--& _UIInputViewContent:0x7f8540411830.width == 0 (active)>", 
    "<NSLayoutConstraint:0x60800009a9a0 H:|-(0)-[_UIButtonBarStackView:0x7f854041b2d0] (active, names: '|':_UIToolbarContentView:0x7f8540402de0)>", 
    "<NSLayoutConstraint:0x60800009a9f0 _UIButtonBarStackView:0x7f854041b2d0.trailing == _UIToolbarContentView:0x7f8540402de0.trailing + 8 (active)>", 
    "<NSLayoutConstraint:0x608000099a00 _UIToolbarContentView:0x7f8540402de0.trailing == UIToolbar:0x7f8540419570.trailing (active)>", 
    "<NSLayoutConstraint:0x608000099aa0 H:|-(0)-[_UIToolbarContentView:0x7f8540402de0] (active, names: '|':UIToolbar:0x7f8540419570)>", 
    "<NSLayoutConstraint:0x604000098560 H:|-(>=5)-[_UIModernBarButton:0x7f8540510b40] (active, names: '|':_UIButtonBarButton:0x7f854050ea30)>", 
    "<NSLayoutConstraint:0x604000098650 H:[_UIModernBarButton:0x7f8540510b40]-(>=5)-| (active, names: '|':_UIButtonBarButton:0x7f854050ea30)>", 
    "<NSLayoutConstraint:0x6040000999b0 H:|-(8)-[_UIModernBarButton:0x7f8540512450'Done'] (active, names: '|':_UIButtonBarButton:0x7f8540511660)>", 
    "<NSLayoutConstraint:0x604000099a00 H:[_UIModernBarButton:0x7f8540512450'Done']-(0)-| (active, names: '|':_UIButtonBarButton:0x7f8540511660)>", 
    "<NSLayoutConstraint:0x60c000094690 'UISV-canvas-connection' UILayoutGuide:0x6080001a9a00'UIViewLayoutMarginsGuide'.leading == 
_UIButtonBarButton:0x7f854050e7f0.leading (active)>", 
    "<NSLayoutConstraint:0x60c0000946e0 'UISV-canvas-connection' UILayoutGuide:0x6080001a9a00'UIViewLayoutMarginsGuide'.trailing == 
_UIButtonBarButton:0x7f8540511660.trailing (active)>", 
    "<NSLayoutConstraint:0x60c000094780 'UISV-spacing' H:[_UIButtonBarButton:0x7f854050e7f0]-(0)-[UIView:0x7f854050f4c0] (active)>", 
    "<NSLayoutConstraint:0x60c000094960 'UISV-spacing' H:[UIView:0x7f854050f4c0]-(0)-[_UIButtonBarButton:0x7f854050ea30] (active)>", 
    "<NSLayoutConstraint:0x60c000094a00 'UISV-spacing' H:[_UIButtonBarButton:0x7f854050ea30]-(0)-[UIView:0x7f8540511480] (active)>", 
    "<NSLayoutConstraint:0x60c000094a50 'UISV-spacing' H:[UIView:0x7f8540511480]-(0)-[_UIButtonBarButton:0x7f8540511660] (active)>", 
    "<NSLayoutConstraint:0x60800009a6d0 'UIView-leftMargin-guide-constraint' H:|-(0)-[UILayoutGuide:0x6080001a9a00'UIViewLayoutMarginsGuide'](LTR) (active, names: '|':_UIButtonBarStackView:0x7f854041b2d0)>", 
    "<NSLayoutConstraint:0x60800009a770 'UIView-rightMargin-guide-constraint' H:[UILayoutGuide:0x6080001a9a00'UIViewLayoutMarginsGuide']-(0)-|(LTR) (active, names: '|':_UIButtonBarStackView:0x7f854041b2d0)>") 

Will attempt to recover by breaking constraint <NSLayoutConstraint:0x604000098650 H:[_UIModernBarButton:0x7f8540510b40]-(>=5)-| (active, names: '|':_UIButtonBarButton:0x7f854050ea30)> 

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. 

Answer 1

これは私の前提ですが、これはios 11のバグです。苦情は、すべてosで設定されたデフォルト値を使用しているキーボードのボタンバーのコンポーネントに関するものです。私は両方のアイオス9とアイオス10で同じコードを実行し、エラーメッセージが表示されません。

Answer 2

つ以上の制約は、キーボードが開いていると同時に、互換性がありません。

フレームを手動で行うのではなく、ur WKWebViewに制約を設定してみてください。 U uがしたいWkWebViewを設定するために、あなたの制約で遊んでする必要が

private func addWKWebView(){ 
    let wv = WKWebView() 
    view.addSubview(wv); 
    wv.translatesAutoresizingMaskIntoConstraints = false 


    wv.widthAnchor.constraint(equalToConstant: 100).isActive = true 
    wv.heightAnchor.constraint(equalToConstant: 100).isActive = true 
    wv.widthAnchor.constraint(equalToConstant: 100).isActive = true 
    wv.heightAnchor.constraint(equalToConstant: 100).isActive = true 
} 

：

private func addWKWebView(){ 
    let wv = WKWebView() 
    view.addSubview(wv); 
    wv.translatesAutoresizingMaskIntoConstraints = false 


    wv.widthAnchor.constraint(equalTo: view.widthAnchor ).isActive = true 
    wv.heightAnchor.constraint(equalTo: view.heightAnchor).isActive = true 
    wv.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true 
    wv.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true 
} 

またはこのような何か。