更新2017-11-16
这个方法不是根本解决约束冲突(其实不设置false能正常显示,只不过snapkit控制台打印太多日志),有时候你设置false,也是自动布局了,可能导致布局显示重叠了!,建议你还是从日志中分析原因;
比如设置了 left 和 right 的约束,还提示width == 0 active,你可以尝试,设置left 和width,不要设置right!
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默认是true 自动布局设置为false 否则设置为true,不然导致ui显示错误或者控制台打印一堆信息
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api官方介绍
/* By default, the autoresizing mask on a view gives rise to constraints that fully determine
the view's position. This allows the auto layout system to track the frames of views whose
layout is controlled manually (through -setFrame:, for example).
When you elect to position the view using auto layout by adding your own constraints,
you must set this property to NO. IB will do this for you.
*/
@available(iOS 6.0, *)
open var translatesAutoresizingMaskIntoConstraints: Bool // Default YES
参考文章:
translatesAutoresizingMaskIntoConstraints属性和autolayout有关，如果你定义的view想用autolayout，就将translatesAutoresizingMaskIntoConstraints设为NO，如果你使用的不是autolayout，就将translatesAutoresizingMaskIntoConstraints设为YES,对应关系如下
autolayout translatesAutoresizingMaskIntoConstraints
是 NO
否 YES
作者：小雨hahaha
链接：http://www.jianshu.com/p/aca357d2bfd8
http://ios.jobbole.com/86353/
AutoresizingMask也是一种布局方式。这个想必大家都有了解。默认情况下，translatesAutoresizingMaskIntoConstraints ＝ true, 此时视图AutoresizingMask会被转换成对应效果的约束。这样很可能就会和我们手动添加的其它约束有冲突。此属性设置成false时AutoresizingMask就不会变成约束。也就是说当前视图的AutoresizingMask失效了。
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self.translatesAutoresizingMaskIntoConstraints = false 父view设置这个属性false 控制台就不会打印下面的警告
2017-11-14 17:27:36.448519+0800 SDJGQuestionbankProject[10435:6583063]
注意////////[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.
注意/////////(Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)////////
(
"<NSAutoresizingMaskLayoutConstraint:0x170280230 h=--& v=--& SDJGQuestionbankProject.YKExamRulesMainView:0x13fd2e790.width == 0 (active)>",
"<SnapKit.LayoutConstraint:
0x1702a2c40@YKExamRulesMainView.swif
t#190 UILabel:0x13fd6ff00.width <= SDJGQuestionbankProject.YKExamRulesMainView:0x13fd2e790.width - 114.0>"
)
Will attempt to recover by breaking constraint
<SnapKit.LayoutConstraint:
0x1702a2c40@YKExamRulesMainView.swif
t#190 UILabel:0x13fd6ff00.width <= SDJGQuestionbankProject.YKExamRulesMainView:0x13fd2e790.width - 114.0>
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.
2017-11-14 17:27:36.449982+0800 SDJGQuestionbankProject[10435:6583063] //[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:0x170280230 h=--& v=--& SDJGQuestionbankProject.YKExamRulesMainView:0x13fd2e790.width == 0 (active)>",
"<SnapKit.LayoutConstraint:
0x1702ad920@YKExamRulesMainView.swif
t#162 UILabel:0x13fe35030.width <= SDJGQuestionbankProject.YKExamRulesMainView:0x13fd2e790.width - 90.0>"
)
Will attempt to recover by breaking constraint
<SnapKit.LayoutConstraint:
0x1702ad920@YKExamRulesMainView.swif
t#162 UILabel:0x13fe35030.width <= SDJGQuestionbankProject.YKExamRulesMainView:0x13fd2e790.width - 90.0>
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