iOS 自动布局 Autolayout 报错:Unable to simultaneously satisfy constraints.
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在使用自动布局时,不断的报下面的错误:
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:0x8c67c10 V:[UIButton:0x8c67320]-(2)-| (Names: '|':UIView:0x8c65ad0 )>",
"<NSAutoresizingMaskLayoutConstraint:0x8e166b0 h=--& v=--& UIButton:0x8c67320.midY ==>",
"<NSAutoresizingMaskLayoutConstraint:0x8e166e0 h=--& v=--& V:[UIButton:0x8c67320(0)]>",
"<NSAutoresizingMaskLayoutConstraint:0x8e130d0 h=-&- v=-&- UIView:0x8c65ad0.height == PicCollectionViewCell:0x8c65a00.height>",
"<NSLayoutConstraint:0x8e13710 'UIView-Encapsulated-Layout-Height' V:[PicCollectionViewCell:0x8c65a00(100)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x8c67c10 V:[UIButton:0x8c67320]-(2)-| (Names: '|':UIView:0x8c65ad0 )>
Break on objc_exception_throw to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.
这种错误,一般就两个原因:
1,约束设置错误,或者约束设置重复,但是数据却不一致。
2,忘记设置控件的:setTranslatesAutoresizingMaskIntoConstraints 等于NO 。
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