Question

我正在使用一个包含两个UITextFields的UIView创建一个iPad-App。
每当我运行我的App时，我单击UITextFields中的一个，然后单击另一个（顺序无关紧要），它总是会引发错误，它必须打破约束。
我什至将两个全新的UITextFields放在UIView上，完全没有任何约束，它仍然向我显示该错误。

[LayoutConstraints] Unable to simultaneously satisfy constraints.
(
    "<NSLayoutConstraint:0x600003db4c80 'assistantHeight' TUISystemInputAssistantView:0x7fdc1f423400.height == 55   (active)>",
    "<NSLayoutConstraint:0x600003dae940 'assistantView.bottom' TUISystemInputAssistantView:0x7fdc1f423400.bottom == _UIKBCompatInputView:0x7fdc1f21bb20.top   (active)>",
    "<NSLayoutConstraint:0x600003dae8f0 'assistantView.top' V:|-(0)-[TUISystemInputAssistantView:0x7fdc1f423400]   (active, names: '|':UIInputSetHostView:0x7fdc1f432480 )>",
    "<NSLayoutConstraint:0x600003da4d70 'inputView.top' V:|-(0)-[_UIKBCompatInputView:0x7fdc1f21bb20]   (active, names: '|':UIInputSetHostView:0x7fdc1f432480 )>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x600003dae940 'assistantView.bottom' TUISystemInputAssistantView:0x7fdc1f423400.bottom == _UIKBCompatInputView:0x7fdc1f21bb20.top   (active)>

我什至尝试了象征性的断点之类的东西，在这里您可以获得更详细的报告，但是我找不到任何线索，这里有什么问题：

UIWindow:0x7fa39f3092a0
|   UITransitionView:0x7fa39f20f360
|   |   UIDropShadowView:0x7fa39f20fa40
|   |   |   UIView:0x7fa39f20f880
|   |   |   |   •UIView:0x7fa39f20b690
|   |   |   |   |   *<UILayoutGuide: 0x6000010e47e0 - "UIViewSafeAreaLayoutGuide", layoutFrame = {{0, 24}, {834, 1088}}, owningView = <UIView: 0x7fa39f20b690; frame = (0 0; 834 1112); autoresize = W+H; layer = <CALayer: 0x600002914fa0>>>
|   |   |   |   |   *UILabel:0x7fa39f20c590'Patient:'
|   |   |   |   |   *UITextField:0x7fa3a1025c00
|   |   |   |   |   |   _UITextFieldRoundedRectBackgroundViewNeue:0x7fa39f20ba90
|   |   |   |   |   |   *_UIBaselineLayoutStrut:0x7fa3a190a320
|   |   |   |   |   |   _UITextFieldCanvasView:0x7fa39f20b340
|   |   |   |   |   *UITextField:0x7fa39f83be00
|   |   |   |   |   |   _UITextFieldRoundedRectBackgroundViewNeue:0x7fa39f20b140
|   |   |   |   |   |   *_UIBaselineLayoutStrut:0x7fa3a1909cb0
|   |   |   |   |   |   UIFieldEditor:0x7fa3a2815000
|   |   |   |   |   |   |   _UITextFieldCanvasView:0x7fa39f20c1f0
|   |   |   |   |   |   |   |   UITextSelectionView:0x7fa39e40a100
|   |   |   |   |   *UIButton:0x7fa39f708b60'Start'
|   |   |   |   |   |   UIButtonLabel:0x7fa3a19063d0'Start'
|   |   |   |   |   *UILabel:0x7fa39f20d200'Sitzung:'
|   |   |   |   |   *UILabel:0x7fa39f709de0'Felder dürfen nicht leer ...'
|   |   |   |   |   *UIButton:0x7fa39f20d480'Daten'
|   |   |   |   |   |   UIButtonLabel:0x7fa3a1909300'Daten'

我在项目中是否遇到其他TextField同样的问题，我尝试了所有操作，包括将TextField放入新的View或添加/删除约束。

Answer 1

问题在于您还分配了一个高度限制，因此可以删除高度限制或底部限制。否则，还有另一种解决方案，您可以将高度限制设置为“不等于”，而设置为“大于”，以确保文本字段永远不会与下面的视图重叠

Answer 2

布局约束错误消息与您的布局无关。

输入助手视图是键盘内部显示的内部问题（可以认为是错误）。

Swift：TextFields总是显示布局约束错误

2 个答案: