Question

在一个运行良好的应用程序中，我只是在代码和故事板中进行了字符串转换，然后，我得到了“无法同时满足约束”错误。

错误是：

    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:0x1d5408d0 V:[UIView:0x1d540c40(0)]>",
 "<NSLayoutConstraint:0x1d540910 V:|-(0)-[UIView:0x1d540c40]   (Names: '|':UIView:0x1d541100 )>",
 "<NSLayoutConstraint:0x1d540fd0 V:[UILabel:0x1d541040(21)]>",
 "<NSLayoutConstraint:0x1d5407d0 V:[UIView:0x1d540c40]-(20)-[UILabel:0x1d541040]>",
 "<NSLayoutConstraint:0x1d540710 V:[LTSelectView:0x1d542210]-(360)-|   (Names: '|':UIView:0x1d541100 )>",
 "<NSAutoresizingMaskLayoutConstraint:0x1d5928b0 h=--& v=--& V:[UIView:0x1d541100(416)]>",
 "<NSLayoutConstraint:0x1d540690 V:[UILabel:0x1d541040]-(19)-[LTSelectView:0x1d542210]>"
 )

Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x1d540fd0 V:[UILabel:0x1d541040(21)]>

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.

翻译负责吗？

我读了很多关于这个主题的帖子，但对我来说理由真的不容易理解。

所以我的目标是：

的UILabel：身高等于21 宽度等于：220 顶部空间顶部布局：17 将中心X对齐：superview Selectview的底部空间：22

LTSelectView：宽度等于：160 高度等于：30 将中心X对齐：superview UILabel的顶级空间：22 到UIButton的底部空间：67

的UIButton：宽度等于：100 高度等于：30 SelectView的顶部空间：67 将中心对齐：superview

事实上我可以看到UILabel，UIButton而不是LTSelectView。所以问题肯定在这里。我试图使用obj_exception_throw但我确实得到了任何东西。

经过其他测试，我只是iOS6上的问题。 iOS7上的情况很顺利。

Answer 1

你的一个标签有太多的垂直约束而且它们不能同时满足。

更改某些约束的优先级或重建它们。

字符串转换后AutoLayout约束冲突

1 个答案: