约束冲突提示 self.translatesAutoresizingMaskIntoConstraints = false

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)////////

(

"",

"

[email protected]

t#190 UILabel:0x13fd6ff00.width <= SDJGQuestionbankProject.YKExamRulesMainView:0x13fd2e790.width - 114.0>"

)

Will attempt to recover by breaking constraint

[email protected]

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 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)

(

"",

"

[email protected]

t#162 UILabel:0x13fe35030.width <= SDJGQuestionbankProject.YKExamRulesMainView:0x13fd2e790.width - 90.0>"

)

Will attempt to recover by breaking constraint

[email protected]

t#162 UILabel:0x13fe35030.width <= SDJGQuestionbankProject.YKExamRulesMainView:0x13fd2e790.width - 90.0>

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